1,115 results on '"Ictiología"'
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2. Revisión taxonómica de la ictiología marina de Galicia: Clases Cephalaspidomorphi y Elasmobranchi.
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BAÑÓN, RAFAEL and MAÑO, TOÑO
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HISTORICAL chronology ,HISTORY of publishing ,SPECIES ,RAYS (Fishes) ,TREATIES ,ICHTHYOLOGY - Abstract
Copyright of Nova Acta Científica Compostelana is the property of Universidad de Santiago de Compostela, Servicio de Publicaciones and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2022
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3. Anatomia do tubo digestório da espécie Leporinus taeniatus Lütken, 1875 (Ostaryohisi, Characiformes).
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França Guedes, Walter, Marques Silva, Rosana, Castro Moreira, Michel, Bezerra Pessoa, Lourdes Marina, and Rodrigues de Souza Castro, Elis Regina
- Abstract
Copyright of Revista Academica Ciencia Animal is the property of Revista Academica Ciencia Animal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
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4. Community of macroparasites of the Pacific barracuda Sphyraena ensis Jordan and Gilbert, 1882 (Perciformes, Sphyraenidae) from the north coast of Peru
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D. Minaya, D. Ferre, M. García, L. Alvariño, and J. Iannacone
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Ecologia ,Ectoparàsits ,Helmints ,Ictiologia ,Parasitologia ,Zoology ,QL1-991 - Abstract
Comunitat de macroparàsits de la barracuda del Pacífic Sphyraena ensis Jordan and Gilbert, 1882 (Perciformes, Sphyraenidae) de la costa nord del Perú L’objectiu d’aquest estudi és informar sobre la comunitat de macroparàsits de la barracuda del Pacífic Sphyraena ensis Jordan and Gilbert, 1882 (Perciformes, Sphyraenidae) de la costa nord del Perú. De setembre a octubre de 2019 vam adquirir 138 exemplars de S. ensis a Caleta de Zorritos, província Contraalmirante Villar, Tumbes, a la costa nord del Perú. La comunitat de paràsits trobada va estar constituïda per nou espècies de monogenis, copèpodes, trematodes i nematodes. La longitud corporal total dels peixos es va correlacionar negativament amb la intensitat mitjana d’infestació per Pseudochauhanea sp. D’altra banda, l’abundància mitjana de Pseudochauhanea sp. va mostrar una marcada diferència significativa entre les poblacions de peixos mascles i femelles i estava més associada als mascles. Proporcionem una llista de macroparàsits registrats en peixos del gènere Sphyraena presents a l’oceà Pacífic Oriental. Llista de dades publicades a GBIF (Doi: 10.15470/5htffh)
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- 2021
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5. Revisión taxonómica de la ictiología marina de Galicia: Clase Actinopteri (Orden Trachiniformes al Orden Tetraodontiformes).
- Author
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BAÑÓN, RAFAEL and MAÑO, TOÑO
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OSTEICHTHYES ,HISTORY of publishing ,SCIENTIFIC literature ,EPINEPHELUS ,MACKERELS ,PERCIFORMES ,PUFFERS (Fish) - Abstract
Copyright of Nova Acta Científica Compostelana is the property of Universidad de Santiago de Compostela, Servicio de Publicaciones and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
6. Revisión taxonómica de la ictiología marina de Galicia: Clase Actinopteri (Orden Acipenseriformes al Orden Scorpaeniformes).
- Author
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BAÑÓN, RAFAEL and MAÑO, TOÑO
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OSTEICHTHYES ,HISTORICAL chronology ,HISTORICAL literacy ,CLASSIFICATION of fish ,HISTORY of publishing - Abstract
Copyright of Nova Acta Científica Compostelana is the property of Universidad de Santiago de Compostela, Servicio de Publicaciones and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
7. Profundulus chimalapensis, una nueva especie de pez ciprinodóntido (Cyprinodontiformes: Profundulidae) del Río Coatzacoalcos, México.
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Fernando Del Moral-Flores, Luis, López-Segovia, Eduardo, and Hernández-Arellano, Tao
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ALVEOLAR process , *WATERSHEDS , *ENDEMIC fishes , *GENETIC speciation , *KILLIFISHES - Abstract
Introduction: The genus Profundulus is considered a Mesoamerican endemic fish which spreading occurs, from the center-south of the state of Guerrero, Mexico, to the central part of Honduras. They mainly inhabit the upper basins and headwaters of the rivers of the Pacific slope, with less diversity in the Atlantic. Objective: This paper, based on morphological comparison we propose a new species, Profundulus chimalapensis sp. nov., confined to Mexico. Methods: Specimens were collected in the tributaries of the upper basin of the Coatzacoalcos River and were deposited in scientific collections. Morphological data (counts, measurements and skeletal features) were taken and compared with related species. Results: The new species differs from its congeners by having the following combination of characters: 12-15 dorsal-fin rays, 14-17 anal- and 13-16 pectoral-fin rays; dark colored stripe on the flanks; anal fin with a clear distal margin; anterior and posterior margin of the alveolar process of the premaxilla concave; pair of short and wide epiotic processes; and large anal fin base, equal to or greater than length of caudal peduncle. Conclusion: The description of this new Profundulus species from Atlantic side of the Isthmus of Tehuantepec suggests that this area has been a center of speciation for the genus. [ABSTRACT FROM AUTHOR]
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- 2020
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8. An inventory of Ichthyofauna of the Pindaré River drainage, Mearim River basin, Northeastern Brazil.
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Guimarães, Erick C., de Brito, Pâmella S., Gonçalves, Cléverson S., and Ottoni, Felipe P.
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DRAINAGE , *FRESHWATER animals , *FISH communities , *FRESHWATER fishes , *INVENTORIES , *RIVERS - Abstract
In the present work, we conducted an extensive long-lasting inventory of the fishes, using different collection methodologies, covering almost the entire Pindaré River drainage, one of the principal tributaries of the Mearim River basin, an area included in the Amazônia Legal region, northeastern Brazil. We reported 101 species, just three of them being non-native, demonstrating that the composition of this studied fish community is majority composed of native species. We found a predominance of species of the orders Characiformes and Siluriformes, corroborating the pattern usually found for the Neotropical fish fauna. Similar to other studies, this inventory was mainly dominated by small characids, representing 21% of the species herein recorded. When comparing the present survey with other species lists published for this region (including the States of Maranhão and Piaui), we can conclude that the freshwater fish fauna of the State of Maranhão is probably still underestimated. We reported 41 more species, and one more species than Soares (2005, 2013) and Abreu et al. (2019) recorded for the entire Mearim River basin, respectively. We believe, however, that the number of species presented by Abreu et al. (2019) is overestimated. We compared our results with all other freshwater fish species inventories performed for the hydrological units Maranhão and Parnaíba sensu Hubbert & Renno (2006). With these comparisons, we concluded that our results evidenced that a high effort was put in the inventory here presented. The two works including more species recorded from coastal river basins of the hydrological units Maranhão and Parnaíba were the works published by Ramos et al. (2014) for the Parnaíba River basin, one of the main and larger river basin of Brazil, and the compiled data published by Castro & Dourado (2011) for the Mearim, Pindaré, Pericumã, and upper Turiaçu River drainages, including 146 and 109 species, respectively. Our survey recorded only 45 less species than Ramos et al. (2014), and eight less species than Castro & Dourado (2011). However, it is essential to emphasize that the number of species presented by Castro & Dourado (2011) is probably overestimated since they did not update and check the taxonomic status of the species of their compiled data. In several cases, they considered more than one name for the same species. [ABSTRACT FROM AUTHOR]
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- 2020
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9. Pasos y escalas de peces (escalas salmoneras).
- Author
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Díaz, Ricardo García
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AQUATIC plants ,FISH migration ,FISH populations ,DIADROMOUS fishes ,FISH conservation ,FISH speciation - Abstract
Copyright of Montes is the property of Colegio y Asociación de Ingenieros de Montes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
10. Description of Thorichthys panchovillai sp. n., a new species of cichlid (Actinopterygii: Cichlidae) from the River Coatzacoalcos Basin, Mexico
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Luis Fernando Del Moral-Flores, Eduardo López-Segovia, and Tao Hernández-Arellano
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Cichliformes ,ictiología ,Neotrópico ,sistemática ,taxonomía ,agua dulce ,nueva especie. ,Science ,Biology (General) ,QH301-705.5 - Abstract
Thorichthys panchovillai, new species, is described, from distinctive of the tributaries of the River Coatzacoalcos basin, Mexico. The new species is diagnosed by a set of characters: dorsal fin rays XVI, 8 – 9; anal fin rays VII, 6 – 7; pectoral fin rays, I, 11 – 12; total gill-rakers on the first branchial cleft 11 – 12; subopercular stain present although weakly intensified, it exposes a notable sexual dimorphism that distinguishes it from others: the female possess a black blotch between the fifth and sixth dorsal spine.
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- 2017
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11. Distribuição das ampolas de lorenzini de isogomphodon oxyrhynchus (Muller & Henle, 1839) (Elasmobranchii, Carcharhinidae) e sua relação com a história natural
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Reis, Roberto Esser dos and Reis, Roberto Esser dos
- Abstract
Isogomphodon oxyrhynchus é um Carcharhinidae de porte médio, endêmico da costa norte oriental da América do Sul, intimamente associado à plataforma continental. Seus olhos pequenos e presença em águas turvas revelam que a percepção do ambiente e detecção de presas através da eletrorrecepção é fundamental para a sua sobrevivência. No entanto, há escassez de estudos em relação à eletrorrecepção da espécie. Categorizada como Criticamente em Perigo pela IUCN, é capturada acidentalmente na pesca artesanal e sua população vem declinando com uma redução de mais de 80% nos últimos 30 anos. Portanto, é necessário investir esforços para a obtenção de dados relativos à sua história natural, constituindo um importante subsídio para a sua conservação. A partir disso, o presente trabalho teve como objetivo analisar a distribuição dos poros eletrossensoriais de I. oxyrhynchus identificando sua importância no modo de vida da espécie. A análise da distribuição, abundância e densidade dos poros foi realizada com base em fotografias e filmagens com microscópio digital. Isogomphodon oxyrhynchus possui a mais alta abundância de poros entre todos os Carcharhiniformes revelando que esta espécie de olhos pequenos e habitante de ambientes de alta turbidez tem seu sistema eletrorreceptor bem desenvolvido o que pode ter maximizado seu sucesso evolutivo nesse tipo de ambiente. Ainda, essa alta abundância pode também ser justificada por ser um gênero morfologicamente derivado, constituindo um sistema eletrossensorial mais complexo e especializado se comparado com as demais espécies. Possui um sistema eletrossensorial de alta resolução e grande densidade de poros no focinho, enfatizando a importância do alongamento dessa estrutura ao expandir o alcance da área de detecção eletrossensorial. Há variação ontogenética na abundância de poros, destacando a importância de um sistema de alta resolução para os adultos. A maior densidade de poros na região ventral indicou preferência alimentar por presas, Isogomphodon oxyrhynchus is a medium-sized Carcharhinidae, endemic to the north eastern coast of South America, closely associated with the continental shelf. The perception of the environment and detection of prey through electroreception is fundamental for its survival, since it has small eyes and lives in murky waters. However, there are few studies on the electroreception of the species. Categorized as Critically Endangered by the IUCN, it is caught in fishery bycatch and its population has been declining with a reduction of more than 80% in the last 30 years. Therefore, it is necessary to invest efforts to obtain data on its natural history, constituting an important subsidy for its conservation. The present work aimed to analyze the distribution of the electrosensory pores of I. oxyrhynchus identifying its importance in the natural history of the species. The analysis of the distribution, abundance and density of the pores was carried out based on photographs and digital microscope videos. Isogomphodon oxyrhynchus possesses the highest abundance of pores among all Carcharhiniformes, revealing that this species with small eyes and high turbidity habitats have a well-developed electroreceptor system that may have amplified its evolutionary success in this type of environment. Furthermore, this high abundance can also be explained by being a morphologically derived genus, comprising a more complex and specialized electrosensory system compared to the other species. It has a high-resolution electrosensory system and a high density of pores on the snout, which emphasizes the importance of the elongated snout since it expands the search area coverage to maximize the possibility of detecting prey. There is ontogenetic variation in pore abundance, highlighting the importance of a high-resolution system for adults. The higher density of pores in the ventral region indicates a preference for benthic prey, despite also feeding on pelagic prey. Evolutionary convergence wa
- Published
- 2023
12. Freshwater fishes of the Parque Nacional dos Lençóis Maranhenses and adjacent areas.
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de Brito, Pâmella Silva, Cristofore Guimarães, Erick, Abreu Ferreira, Beldo Rywllon, Polivanov Ottoni, Felipe, and Magalhães Piorski, Nivaldo
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FRESHWATER fishes , *WATERSHEDS , *BODIES of water , *INTRODUCED species , *FRESHWATER animals , *BRACKISH waters - Abstract
We present here an embracing freshwater fish inventory of the Parque Nacional dos Lençóis Maranhenses and adjacent areas, reporting 49 fish species, 33 of which were identified accurately at the species level, representing ten orders and 25 fish families that range from obligate freshwater to estuarine organisms. This number of species is much larger than two previous studies for the park, each reporting just 12 and 33 fishes occurring on freshwater environments. Among the 49 freshwater species recorded in this study, 14 are new records for the Parque Nacional dos Lençóis Maranhenses, and just one corresponds to an introduced species. Some of the 14 new records in the Parque Nacional dos Lençóis Maranhenses, cited above, as well as some of the 16 species which we are not able to identify accurately at the species level, could include undescribed species, but more study is necessary before sorting out which species are truly undescribed, and which are already described ones. The orders reported by this survey which comprise the highest percentage of species richness, excluding introduced species, were: Characiformes, Cichliformes and Siluriformes, in the same ranking position, and Gymnotiformes, as expected for Neotropical freshwater surveys. The families with the highest number of species, excluding non-native species, were: Characidae, followed by Cichlidae, and Loricariidae. Out of the 33 species herein identified accurately at the species level, five of them are species typically found in brackish water environments, and when occurring on freshwater environments, are restricted mainly to estuaries, or, occasionally, the lower portions of the rivers. Thus, we will not address them in our biogeographical comments. From the remaining 28 species, eight did not occur in the Amazon River basin, six of them being endemic to the Maranhão-Piauí ecoregion. The remaining species herein reported also have their distribution recorded for the Amazon River basin, which shows the great influence of the Amazon basin. In the last two decades efforts to inventory the freshwater fish fauna and to taxonomically solve some groups occurring on the Maranhão state have been made. However the knowledge regarding the composition of the Maranhão freshwater fishes is still insufficient and underestimated, with several groups still lacking adequate taxonomic and systematic resolution, and with many gaps of knowledge, something that is not appropriate for our current picture of "biodiversity crisis". As well as, the other Brazilian protected areas, the PNLM fails to preserve its freshwater environment properly, since it includes only fragments of the major river systems of the area, not including and conserving the hole river drainages, mainly excluding their headwaters. Thus, its water bodies are exposed to typical human impacts. [ABSTRACT FROM AUTHOR]
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- 2019
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13. A history of the biogeography of Amazonian fishes
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Fernando C. P. Dagosta and Mário C. C. de Pinna
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Amazonas ,América do Sul ,Biodiversidade ,Ictiologia ,Neotropical ,Zoology ,QL1-991 - Abstract
ABSTRACT The history of knowledge about Amazonian biogeography is as rich as its fish community, and a fascinating theme of study in itself. Several current paradigms and controversies about Amazonian fish biogeography are rooted in principles dating from the second half of the 18th to the first half of the 19th centuries. The present work establishes a relationship between current biogeographical ideas and their old predecessors, on the basis of a chronologically-oriented historical continuity analysis. The advent of evolutionary theory has not contributed significantly to a transformation of the knowledge on the biogeography of Amazonian fishes. On the other hand, the two main schools of biogeographical thought (dispersalist and vicariant) had major implications on how Amazonian fish distribution is interpreted. The process was gradual and many hypotheses have combined elements from each of the two schools. Chronologically, practically the entire tradition of Amazonian biogeography takes place within the evolutionary paradigm, although its founder Louis Agassiz was himself an anti-evolutionist. The birth of Amazonian biogeography is Agassiz´s travel in Amazon. That document makes it clear that the author did not consider dispersal as a valid explanation for the biogeographical patterns he found. Later, Carl Eigenmann helps to spread the dispersalist tradition as a model for biogeographical explanations in fish distributions, a phase which lasted until the late 20th century. A major shift occurs with the contributions of Marylin Weitzman, Stanley Weitzman and Richard Vari, who associated the temporal framework of phylogenetic hypotheses with distribution patterns, underscoring the predictive power of vicariant biogeography. The present-day paradigm begins with the work of John Lundberg and attempts to incorporate geomorphological and phylogenetic information into integrative biogeographical hypotheses. Some emblematic problems have delayed proposition of general hypotheses on the phylogenetic biogeography of South American fishes, such as the poor state of knowledge of their species-level systematics; an incomplete distributional record for most species and sparse or non-existent data on the phylogenetic history of most supraspecific taxa. Such drawbacks are now being corrected at a fast pace. Recent advances on geographical distribution and an increasing number of phylogenetic hypotheses will allow unprecedented large-scale biogeographic analyses, including those based on event models and Bayesian inference. Thus, the biogeography of South American fishes, especially Amazonian ones, should soon experiment a new age of progress. The success of that new phase will depend on its ability to recognize and segregate multiple overlapping temporal layers of hydrological changes, and to develop analytical tools that can deal with temporal mixing.
- Published
- 2018
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14. Diversidad de la ictiofauna de la laguna Hule, Costa Rica
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José Pablo Barquero-González, Ronald Mora-Vargas, Jorge Valerio-Vargas, and Juan Ulloa-Rojas
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Laguna Hule ,ictiología ,diversidad de peces ,peces de agua dulce ,General Works - Abstract
La laguna Hule es un cráter de origen volcánico que se ha inundado con el tiempo, dando como resultado una gran masa de agua, sin estudios previos sobre su comunidad de peces. Muestreamos durante cinco meses la laguna y una quebrada (Pata de Gallo) con redes, gancho y línea. Los especímenes capturados se identificaron in situ al nivel taxonómico posible más bajo. La laguna tenía especies que normalmente se encuentran cerca de la vegetación acuática: Amatitlania siquia, Amphilophus alfari, Astyanax aeneus, Cynodonichthys sp., Parachromis dovii, Phallichthys amates y Poecilia gillii (dominante: A. aeneus, P. gillii y P. amates). La quebrada estaba dominada por Brachyrhaphis olomina pero también tenía Rhamdia laticauda. Los índices de baja diversidad (1,48 en la laguna y 0,26 en la quebrada) son característicos de los ecosistemas lacustres. Las hembras fueron, como se esperaba, más grandes y abundantes en P. amates y B. olomina; mientras que en P. gilli, algunos machos eran más grandes. El área se ve afectada por la contaminación, la introducción de especies invasoras, la pesca incontrolada y el uso de equipo destructivo de pesca. Proponemos la demarcación del estado de protección del sitio y la organización de un grupo comunitario para proteger a esta comunidad de peces.
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- 2018
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15. Implicación del Sistema de Melanocortinas en la Reproducción del Pez Cebra
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Navarro Rojas, Sandra Ximena, Cerdà-Reverter, José Miguel, Rocha, Ana Maria dos Santos, and Universitat de Barcelona. Departament de Biologia Cel·lular, Fisiologia i Immunologia
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Zebra danio ,Peix zebra ,Aqüicultura ,Hormones peptídiques ,Aquaculture ,Ichthyology ,Ictiologia ,Peptide hormones - Abstract
[spa] El sistema de melanocortinas es probablemente uno de los sistemas hormonales más complejos involucrados en la regulación de la ingesta de alimentos y la homeostasis energética. Las melanocortinas son péptidos derivados de un complejo precursor peptídico denominado proopiomelanocortina (POMC). Su procesado genera diversos péptidos de melanocortina entre los que se encuentran las hormonas estimulantes de melanocitos (MSHs) y la hormona adrenocorticotrópica (ACTH). Las funciones de las melanocortinas se median a través de 5 receptores diferentes (MC1R-MC5R). Tanto ACTH como MSH activan los MCRs con diferente afinidad, pero MC2R solo es activado por ACTH. La señalización de melanocortinas también puede ser modulada por dos antagonistas endógenos, la proteína de señalización de agutí (ASIP) y la proteína relacionada con agutí (AGRP) que compiten con los péptidos de melanocortina al unirse a MCR. Entre los MCR, el MC4R está involucrado en el control de la ingesta y la reproducción. Las mutaciones negativas dominantes de Mc4r se han relacionado con un tamaño corporal más grande y un inicio tardío de la pubertad en Xiphophorus. Investigaciones en el pez cebra demuestran que la supresión de la actividad central del Mc4r es esencial para el crecimiento larvario. De forma similar, la supresión del Mc4r resulta en una disminución de la expresión de fshb y lhb. Esto sugiere que, en los peces, el Mc4r participa no solo en el control de la ingesta de alimentos, sino que también en la reproducción. Experimentos desarrollados en nuestro laboratorio, han demostrado que Asip1 funciona como un antagonista endógeno tanto de Mc1R como de Mc4R. Además, la generación de una cepa transgénica de pez cebra que sobreexpresa asip1 de pez dorado (asip1-Tg), demostró la participación del sistema de melanocortinas en la regulación del patrón pigmentario dorsoventral y estimulación del crecimiento. En consecuencia, este modelo transgénico supone una excelente oportunidad para estudiar la relación entre el sistema de melanocortinas, el crecimiento y la reproducción. Los resultados presentados en esta tesis demuestran que la disminución de la actividad del sistema de melanocortina inducida por la sobreexpresión de asip1 retrasa significativamente el crecimiento temprano de los animales transgénicos, exhibiendo un crecimiento reducido hasta completar el desarrollo gonadal. Además, no tuvo efecto fenotípico sobre la pubertad y mermó el potencial reproductivo en comparación con los peces WT, lo que se refleja en una menor calidad del huevo y diámetro del vitelo, un retraso en el tiempo de eclosión y el crecimiento larvario. La caracterización de los niveles de expresión relativa de los receptores de melanocortinas, proteínas accesorias, agonistas y antagonistas en gónadas de pez cebra así como la expresión de mc1r y mc4r en oocitos previtelogénicos y vitelogénicos y en células germinales masculinas, respalda el papel del sistema de melanocortinas en la fisiología gonadal. Además, nuestros experimentos in vitro sugieren que los pétidos de melanocortinas pueden modular la síntesis de esteroides gonadales. Finalmente, la expresión de mc4r en gonadotropos y la modulación de la síntesis de gonadotropinas por los péptidos melanocortina sugiere un posible rol paracrino en la síntesis y liberación de hormonas reproductivas desde la adenohipófisis., [eng] The melanocortin system is probably one of the most complex hormonal systems involved in the regulation of food intake and energy homeostasis. Melanocortins are peptides processed from a complex precursor named proopiomelanocortin (POMC). Its processing generates different melanocortin peptides, including melanocyte-stimulating hormones (MSHs) and adrenocorticotropic hormone (ACTH). Melanocortin functions are mediated by five receptors (MC1R-5). ACTH and MSHs activate MCRs with different affinities, while MC2R only binds ACTH. Melanocortin signaling can also be modulated by two endogenous antagonists, agouti signaling protein (ASIP) and agouti-related protein (AGRP), that compete with melanocortin peptides for binding to MCRs. Among the MCRs, MC4R plays a role in the control of food intake and reproduction. Dominant negative mutations of Mc4r have been linked to larger body size and delayed onset of puberty in Xiphophorus. In zebrafish, it has been demonstrated that suppression of central Mc4r activity is essential for larval growth. Similarly, suppression of Mc4r results in decreased expression of fshb and lhb. In fish, Mc4r plays a role not only in the control of food intake, but also in reproduction. Experiments in our laboratory have shown that Asip1 works as an endogenous antagonist of Mc1R and Mc4R. In addition, the transgenic zebrafish line overexpressing goldfish asip1 (asip1-Tg), demonstrated the participation of the melanocortin system in the dorsoventral pigmentation pattern and fish growth. This transgenic model is an excellent opportunity to study the relationship between the melanocortin system, body growth and reproduction. The results presented in this thesis show that a decrease in the activity of the melanocortin system induced by asip1 overexpression significantly delays early growth in transgenic animals, exhibiting reduced growth until they reach the full gonadal development. The transgene has no phenotypic effect on puberty timing but decreases reproductive performance reflected in egg quality and yolk diameter, delayed hatching time and larval growth. Characterization of the relative expression levels of melanocortin receptors, their accessory proteins, agonists and antagonists in zebrafish gonads as well as the expression of mc1r and mc4r in previtellogenic and vitellogenic oocytes and male germ cells supports a role for the melanocortin system in the gonadal physiology. Furthermore, in vitro studies suggest that melanocortin peptides may modulate gonadal steroid synthesis. Finally, the expression of mc4r in the gonadotropes and the modulation of gonadotropin synthesis by melanocortin peptides, suggest a paracrine role in the synthesis and secretion of reproductive hormones from the adenohypophysis.
- Published
- 2023
16. Ichthyofauna of the Ribeirão Frutal and tributaries, upper Rio Paraná basin, Minas Gerais, Southeastern Brazil.
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Azevedo-Santos, Valter M., Coelho, Paula N., and de Carvalho Deprá, Gabriel
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ICHTHYOLOGY , *WATERSHEDS - Abstract
The Ribeirão Frutal basin is located within the upper Rio Paraná system, in the Frutal municipality, Minas Gerais State, Southeastern Brazil. Until now, there was no complete ichthyological survey published for this small basin. Therefore, here we provided a list of fish species from the Ribeirão Frutal and some of its tributaries. We found 31 species of fishes representing five orders and ten families. We identify a likely undescribed and five non-native species in the Frutal basin. Lastly, we recommend new surveys of fishes in small hydrographic basins within upper Rio Paraná system. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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17. A history of the biogeography of Amazonian fishes.
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Dagosta, Fernando C. P. and de Pinna, Mário C. C.
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- *
BIOGEOGRAPHY , *GEOGRAPHICAL distribution of fishes , *FISHES , *FISH communities , *HISTORICAL analysis , *EVOLUTIONARY theories - Abstract
The history of knowledge about Amazonian biogeography is as rich as its fish community, and a fascinating theme of study in itself. Several current paradigms and controversies about Amazonian fish biogeography are rooted in principles dating from the second half of the 18th to the first half of the 19th centuries. The present work establishes a relationship between current biogeographical ideas and their old predecessors, on the basis of a chronologically-oriented historical continuity analysis. The advent of evolutionary theory has not contributed significantly to a transformation of the knowledge on the biogeography of Amazonian fishes. On the other hand, the two main schools of biogeographical thought (dispersalist and vicariant) had major implications on how Amazonian fish distribution is interpreted. The process was gradual and many hypotheses have combined elements from each of the two schools. Chronologically, practically the entire tradition of Amazonian biogeography takes place within the evolutionary paradigm, although its founder Louis Agassiz was himself an anti-evolutionist. The birth of Amazonian biogeography is Agassiz's travel in Amazon. That document makes it clear that the author did not consider dispersal as a valid explanation for the biogeographical patterns he found. Later, Carl Eigenmann helps to spread the dispersalist tradition as a model for biogeographical explanations in fish distributions, a phase which lasted until the late 20th century. A major shift occurs with the contributions of Marylin Weitzman, Stanley Weitzman and Richard Vari, who associated the temporal framework of phylogenetic hypotheses with distribution patterns, underscoring the predictive power of vicariant biogeography. The present-day paradigm begins with the work of John Lundberg and attempts to incorporate geomorphological and phylogenetic information into integrative biogeographical hypotheses. Some emblematic problems have delayed proposition of general hypotheses on the phylogenetic biogeography of South American fishes, such as the poor state of knowledge of their species-level systematics; an incomplete distributional record for most species and sparse or non-existent data on the phylogenetic history of most supraspecific taxa. Such drawbacks are now being corrected at a fast pace. Recent advances on geographical distribution and an increasing number of phylogenetic hypotheses will allow unprecedented large-scale biogeographic analyses, including those based on event models and Bayesian inference. Thus, the biogeography of South American fishes, especially Amazonian ones, should soon experiment a new age of progress. The success of that new phase will depend on its ability to recognize and segregate multiple overlapping temporal layers of hydrological changes, and to develop analytical tools that can deal with temporal mixing. [ABSTRACT FROM AUTHOR]
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- 2018
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18. Dieta y reproducción de Bryconamericus caucanus (Characiformes: Characidae) en la Quebrada La Venada, Río Quindío, Colombia
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Cristian Román P. and César Román Valencia
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Ictiología ,Especies nativas ,Estadísticas ambientales ,Región Andina ,Veterinary medicine ,SF600-1100 - Abstract
Objetivo. Se analizó la ecología trófica y reproductiva de Bryconamericus caucanus en la quebrada la Venada, Rio Quindío, Alto Cauca, Colombia. Materiales y métodos. Los ejemplares se recolectaron entre enero y diciembre del 2013. Se realizaron análisis multivariados para comparar las características tróficas entre épocas climáticas (bajas y altas lluvias), sexos y estados de madurez (juveniles y adultos). Se analizó también el factor de condición (K), porcentajes numéricos (%N), volumétricos (%V) y frecuencia de ocurrencia (%Fo) para cada presa. La proporción de sexos se evaluó usando pruebas de Chi-Cuadrado y se estimaron los indices gonadosomático (IGS) y de fecundidad absoluta (Fa). Resultados. Se analizó un total de 162 ejemplares (LS: 40-75 mm). Se encontró que B. caucanus es un pez insectívoro (86.47% IRI), con un consumo preponderante de ephemeropteros (Baetidae; 27.71%), hymenopteros (Formicidae; 23.57%), dipteros (Simuliidae 17.36%; Chironomidae 9.79%) y trichopteros (Hydropsychidae; 8.04). Los analisis multivariados revelaron diferencias tróficas entre épocas climáticas, con menor riqueza durante la época de sequía. Entre sexos, las hembras registran una mayor amplitud del nicho trófico. Los adultos, presentan una amplitud de nicho mayor a juveniles. La especie tiene dos eventos reproductivos en los periodos de altas lluvias relacionados con el incremento en la riqueza trófica durante las mismas épocas (i.e. marzo-abril, septiembre-noviembre). Conclusiones. B. caucanus presenta una segregación trófica incipiente entre estadios ontogénicos y sexos. La distinción trófica es sin embargo notable entre periodos climáticos. Los periodos de desove para B. caucanus ocurren a inicio de los periodos de lluvias (i.e. mayo-junio y septiembre-octubre).
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- 2017
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19. La pesca comercial y el estudio de la fauna marina en la Argentina, 1890-1930
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Susana V. Garcia
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pesca comercial ,ictiología ,formación de colecciones ,barcos pesqueros ,History of medicine. Medical expeditions ,R131-687 - Abstract
Este trabajo examina la relación entre el desarrollo de la pesca comercial marítima y el estudio de la fauna marina en la Argentina de fines del siglo XIX y las primeras décadas del siglo XX. Se analizan las investigaciones ictiológicas, la comercialización de productos marítimos frescos y las oportunidades que ofrecieron los mercados urbanos para la formación de colecciones. También se focaliza en los inicios de la pesca de altura que posibilitaría la captura y estudio de nuevas especies así como la acumulación de información sobre el ambiente marino.
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- 2014
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20. Aspectos morfométricos do tubo digestório de Roeboides xenodon e Orthospinus franciscensis
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José Fernando Marques Barcellos, Erika Branco, and Daylla Pontes
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Esôfago ,Ictiologia ,Intestino ,Morfologia ,Orthospinus ,Roeboides ,Science ,Biology (General) ,QH301-705.5 - Abstract
Roeboides xenodon (dentudo) e Orthospinus franciscensis (piaba-facão) são peixes teleósteos de pequeno porte com hábitos alimentares onívoros. Com o objetivo de estudar a morfologia do tubo digestório exemplares de O. franciscensis (n=25) e de R. xenodon (n=16) foram coletados na bacia do rio São Francisco, represa de Três Marias – MG, e fixados em formol a 4%. Em ambas as espécies, o esôfago curto teve início na região cefálica e, após o septo transverso, continuou na cavidade peritoneal até à primeira região do estômago. Em R. xenodon, o esôfago apresentou pregas primárias espessas, estreitas e dispostas longitudinalmente, separadas por sulcos profundos e bordas livres e retas e pregas secundárias entre estas. Em O. franciscensis, o esôfago apresentou pregas primárias espessas e largas, longitudinais, sem sulcos profundos, mas com bordas livres e poucas anastomoses. O estômago é do tipo cecal, em “Y”. Os intestinos apresentaram duas porções: a anterior, mais longa e circunvoluta e a posterior, curta e linear. O início do intestino posterior foi demarcado pela alteração abrupta do padrão da mucosa. O esfíncter anal delimitou posteriormente o tubo digestório. O tubo digestório de ambas as espécies é completo e as adaptações tróficas encontradas no aparelho digestório são condizentes com o hábito alimentar carnívoro.
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- 2014
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21. Reef fishes of the Anchieta Island State Park, Southwestern Atlantic, Brazil.
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de Souza, Gabriel Raposo Silva, Fazzano Gadig, Otto Bismark, Santos Motta, Fabio dos, de Moura, Rodrigo Leão, Francini-Filho, Ronaldo Bastos, and Garrone-Neto, Domingos
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- *
REEF fishes , *FISH conservation , *PARKS - Abstract
This paper presents a checklist of the reef fish fauna of the Anchieta Island State Park, a no-take zone in which no extractive activities are allowed, in Ubatuba, Southeastern Brazil. Data was obtained between 2011 and 2013, mainly through underwater observations with snorkelling and SCUBA, and secondarily using scientific fishing (trawling). Published and unpublished data were also verified and compiled. A total of 103 reef fish species, distributed in 78 genus and 50 families was recorded. Haemulidae was the richest family (n=7 species), followed by Epinephelidae (n=6), Pomacentridae, Carangidae and Tetraodontidae (n= 4 each). Haemulon was also the most speciose genera (n=5), followed by Stegastes, Acanthurus and Mycteroperca (n=3 each). Sixty-nine species (67%) are included in global and regional Red Lists. Twenty-five species (24.2%) are within the categories Critically Endangered (CR), Endangered (EN), Vulnerable (VU) and Near-Threathened (NT). The network of Marine Protected Areas in Southeastern Brazil is still incipient, and the considerable number of threatened species in the Anchieta Island State Park clearly indicates the importance of the study area for the conservation of coastal and reef fishes. [ABSTRACT FROM AUTHOR]
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- 2018
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22. NUEVA ESPECIE DE LENGUADO DEL GÉNERO Gymnachirus (PLEURONECTIFORMES: ACSHIRIDAE) DEL NORTE DE ISLA MARGARITA.
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CERVIGÓN, FERNANDO
- Abstract
Copyright of Instituto Oceanografico de Venezuela (Boletin) is the property of Universidad de Oriente and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
23. Diet and reproduction of Bryconamericus caucanus (Characiformes: Characidae) in the Venada Creek, Quindío River, Colombia.
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Román-P., Cristian and Román-Valencia, César
- Abstract
Objectives: The reproductive and trophic ecology of Bryconamericus caucanus was analyzed in la Venada creek, Quindío river, Alto Cauca, Colombia. Materials and methods. Individuals were collected between January and December 2013. Multivariate analyses were performed to compare the trophic characteristics of the species between climatic periods (wet and dry), sexes, and sexual maturity (juvenile and adults). We also analyzed the condition factor (K) and the numerical (%N), volumetric (%V), and frequency (%Fo) percentages for each prey. We tested for deviations in the sex proportion using chi-squared tests and we also estimated the Gonodosomatic Index (GSI) and absolute fecundity (Fa). Results. A total of 162 individuals (SL: 40-75 mm) were here analyzed. B. caucanus is an insectivorous fish (86.47% IRI) that mainly feeds on the orders Ephemeroptera (Baetidae; 27.71%), Hymenoptera (Formicidae; 23.57%), Diptera (Simuliidae 17.36%; Chironomidae 9.79%), and Trichoptera (Hydropsychidae; 8.04). Multivariate analyses showed differences between climatic periods, with the lowest richness occurring during dry season. Between sexes, females showed the widest trophic niche. Adults, on the other hand, showed a wider trophic niche than juveniles. The species has two reproductive peaks during rainy seasons which are also related to the increase in the trophic richness during the same periods (March-April, September-November). Conclusions. We found that B. caucanus has an incipient trophic differentiation between ontogenic stages and sexes. Trophic differences are remarkable between climatic periods. The two spawning periods for the species occur during the beginning of the wet seasons (March-April, September-November). [ABSTRACT FROM AUTHOR]
- Published
- 2017
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24. Abundancia, biomasa y estructura de la ictiofauna demersal en el océano Pacífico de Centroamérica, basadas en datos de prospección pesquera realizados a bordo del B/O Miguel Oliver
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José Mauro Vargas-Hernández, Fernando Campos-Calderón, and Rosario Benavides-Morera
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OCÉANO PACÍFICO ,ICHTHYOLOGY ,ICTIOLOGÍA ,AMÉRICA CENTRAL ,General Medicine ,BIOMASA ,CENTRAL AMERICA - Abstract
A razón de ampliar el conocimiento sobre la estructura y composición de la ictiofauna demersal en el Pacífico de Centroamérica, se realizó el estudio de muestras obtenidas en 98 puntos de arrastre efectuados con el B/O Miguel Oliver entre el 10 de noviembre y el 16 de diciembre de 2010. Con una red tipo Lofoten, se faenó por 30 minutos sobre los puntos ubicados según estratos y profundidad (máxima 1 600 m). La muestra total (17 507 ejemplares) tuvo representación de peces cartilaginosos y óseos divididos en 77 familias y 158 especies. Dicrolene filamentosa (12.27%) mostró la mayor abundancia, las biomasas más representativas del estudio fueron de Peprilus medius (35.67%) y Peprilus snyderi (12.49%) junto con Rhinoptera steindachneri (9.45%), mientras que las especies más frecuentes fueron Peristedion barbiger y Stomias atriventer (ambas con 2.71%). La costa frente a Costa Rica y Panamá mostró diversidad alta (H’:3), mientras que la equidad presentó valores uniformes. Para determinar ensamblajes con respecto a la profundidad, se utilizó un ordenamiento espacial que mostró un agrupamiento de 3 conjuntos (PERMANOVA, R = 0.54, P > 0.05) y un análisis canónico de correspondencia, el cual arrojó evidencia suficiente de que las especies fueron influenciadas en su distribución por la salinidad y la temperatura. La ictiofauna encontrada responde a eventos y condiciones ambientales particulares que revisten de gran importancia ecológica los hallazgos. Se resalta lo fundamental de los ensamblajes para evaluar cómo las poblaciones cambian como resultado de las características que exhiben las masas de agua. In order to expand knowledge about the structure and composition of demersal ichthyofauna on the Pacific of Central America, we analyzed samples collected from 98 sampling points on board the R/V Miguel Oliver from November 10 to December 16, 2010. Using a Lofoten net, trawl surveys were conducted for 30 minutes at each sampling point at different stratums and depths (1600 m maximum). The total sample (17507 specimens) was represented by cartilaginous fish and bony fish divided into 77 families and 158 species. Dicrolene filamentosa (12.27%) showed the highest abundance; Peprilus medius (35.67%) and Peprilus snyderi (12.49%) reported the most representative biomass along with Rhinoptera steindachneri (9.45%); in addition, Peristedion barbiger and Stomias atriventer were the most frequent species (both 2.71%). The coast between Costa Rica and Panama showed the highest diversity (H’:3), while evenness showed uniform values along the studied area. In order to determine fish assemblages in response to depth, a spatial ordering was used showing a 3-set grouping (PERMANOVA, R = 0.54, P> 0.05). Furthermore, a canonical correspondence analysis shows enough evidence that the species distribution was influenced by salinity and temperature. Findings are ecologically significant indicating that ichthyofauna responds to particular environmental conditions and events. In addition, the paper highlights the importance of assemblages to assess how fish populations change as a result of the characteristics exhibited by water bodies. Universidad Nacional, Costa Rica Departamento de Física
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- 2020
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25. Camarones del Henares: ecos y deslindes en Juan Ruiz
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Ángel Gómez Moreno
- Subjects
edad media ,literatura ,españa ,ornitología ,ictiología ,lexicografía ,juan ruiz ,libro de buen amor ,Philology. Linguistics ,P1-1091 - Abstract
Aunque en el título de esta nota se apunta sólo a un verso concreto del Libro de Buen Amor, en realidad se revisan varios pasajes de la obra con referencias ictiológicas y ornitológicas oscuras a las que editores y exegetas no han sabido dar una solución satisfactoria.
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- 2011
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26. P. J. Holartes : Un ignoto naturalista del siglo XX
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López, Hugo Luis
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Ciencias Naturales ,Naturalistas ,Homenaje ,Ictiología - Abstract
Este documento tiene el propósito de compilar a modo de rescate, los escritos sobre la figura de un naturalista y filósofo de principios del siglo XX, que bien la podríamos ubicar entre los “grandes olvidados” de las Ciencias Naturales de nuestro país, ya que sus contribuciones recién comienzan a visualizarse en la comunidad ictiológica nacional, a partir de la década del ochenta. Espero que este aporte, impulse a aquellos interesados en este “mito ictiológico” a seguir con esta tarea, y llegar a conclusiones definitivas sobre esta vida errante y aún con incierto final. Al final del documento se adjunta una serie de reflexiones del P. J. Holartes, donde se puede apreciar su búsqueda interior y la preocupación por la conservación de los recursos., Facultad de Ciencias Naturales y Museo
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- 2022
27. An essay about 'Nuevos conceptos sobre la distribución geográfica de los peces argentinos basados en expediciones del Museo de La Plata', by Emiliano J. Mac Donagh (1934)
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López, Hugo Luis and Nadalin, Diego Oscar
- Subjects
Aquatic ecology ,Distribución ,Ecología acuática ,Systematics ,Zoología ,Ictiología ,Distribution ,Sistemática ,Ichthyology - Abstract
En este artículo nos proponemos una revisión del trabajo “Nuevos conceptos sobre la distribución geográfica de los peces argentinos basados en expediciones del Museo de La Plata” que consideramos entre unos de los más importantes de la extendida producción realizada por el Dr. Emiliano Mac Donagh. Esta obra al momento de su publicación ha trascendido el ámbito de la Ictiología, ya que el autor ha logrado realizar un singular aporte contextualizando el estudio de la fauna y su ambiente, por medio de análisis poco habituales para la época. Este artículo no ha sido un hecho aislado para Mac Donagh, sino el germen de una línea de investigación que tanto camino lograra recorrer en nuestra Institución, y en el ámbito nacional., In this article we propose a review of the abovementioned work, which we consider to be among the most important among the extensive production carried out by Dr. Emiliano Mac Donagh. This paper at the time of its publication transcended the flied of ichthyology, since the author managed to make a unique contribution contextualizing the study of the fauna and its environment, through analyzes that were not usual for that time. This paper was not an isolated event for Mac Donagh, but rather the germ of a research line that has advanced such a long way within our Institution as well as at national scale., Neste artigo propomos uma revisão da obra "Novos conceitos sobre a distribuição geográfica dos peixes argentinos baseados em expedições do Museu de La Plata", que consideramos ser uma das mais importantes da extensa produção realizada pelo Dr. Emiliano Mac Donagh. À época de sua publicação, esta obra transcendeu o campo da Ictiologia, pois o autor conseguiu dar uma contribuição ímpar ao contextualizar o estudo da fauna e seu ambiente, por meio de análises pouco habituais para a época. Este artigo não foi um feito isolado para Mac Donagh, mas sim o germe de uma linha de pesquisa que tanto caminho percorreu em nossa Instituição, e em nível nacional., Dossier: 130 años de la Revista del Museo de La Plata, Facultad de Ciencias Naturales y Museo
- Published
- 2022
28. New records and first approach of fish richness in the inland waters of the Yacyretá Nature Reserve
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Avila-Torres, Ignacio, Moreno, Mariel, and Cubilla, Fernando
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región Neotropical ,lagunas artificiales ,artificial lagoons ,Paraguay ,Ictiología ,Neotropical region ,Ichthyology ,Yacyretá Island ,Isla Yacyretá - Abstract
Resumen: La Reserva Natural Yacyretá (RNY) se encuentra ubicada en el extremo Sur del Paraguay, al oeste de la traza de la represa Yacyretá, abarcando aproximadamente 8.481 hectáreas. Presenta lagunas de origen artificial de agua permanente, producto del retiro de material térreo para la construcción de la Represa Binacional Yacyretá sobre el río Paraná. El objetivo fue relevar la fauna íctica presente en las aguas interiores de la RNY. El estudio se realizó en tres estaciones de muestreo en aguas internas de la RNY desarrollándose una sola campaña pesquera, durante los días 16 al 18 de setiembre de 2017. Se colectaron 11 especies, resultando 8 nuevos registros para la RNY, Corydoras undulatus, Hyphessobrycon eques, Astyanax bimaculatus, Curimatopsis myersi, Pirrulina australis, Hoplerythrinus unitaniatus, Rivulus punctatus y Letacara dorsigera. Abstract: The Yacyretá Nature Reserve (YNR) is located in the extreme south of Paraguay, to the west of the Yacyretá dam, covering approximately 8,481 hectares. It has lagoons of artificial origin of permanent water, as a result of the removal of earth material for the construction of the Yacyretá Binational Dam on the Paraná River. The objective was to survey the fish fauna present in the inland waters of the YNR. The study was carried out in three sampling stations in internal waters of the YNR developing a single fishing campaign, during the days 16 to 18 September 2017. Eleven species were collected, resulting in 8 new records for the YNR, Corydoras undulatus, Hyphessobrycon eques, Astyanax bimaculatus, Curimatopsis myersi, Pirrulina australis, Hoplerythrinus unitaniatus, Rivulus punctatus y Letacara dorsigera.
- Published
- 2021
29. DESARROLLO DE LA ICTIOLOGIA: EXTENSION HACIA LA ENSEÑANZA BÁSICA y MEDIA EN CHILE ICHTHYOLOGY DEVELOPMENT: EXTENSION TO ELEMENTARY AND HIGH SCHOOL TEACHING IN CHILE
- Author
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Laura G. Huaquín
- Subjects
Programa Educativo ,ictiología ,enseñanza básica y media ,Chile ,Educational Program ,Ichthyology ,Elementary and High School Education ,Oceanography ,GC1-1581 ,Zoology ,QL1-991 - Abstract
Con el objeto de hacer extensivos los conocimientos ictiológicos e incrementar las posibilidades de desarrollo de esta disciplina en nuestro país, se propone la creación de un Programa Educativo a Distancia para la enseñanza de la Ictiología, considerando el desarrollo de temas básicos y especializados, al alcance de enseñanza básica y media, con la finalidad de motivar en estos estudiantes las inquietudes hacia el conocimiento de la fauna íctica tanto la representada en los ambientes marinos como dulceacuícolas del país. El diagnóstico sobre el conocimiento de este tipo de fauna en el ciudadano común es bastante precario. Chile es un país con grandes recursos hidrológicos, una extensa costa, numerosas cuencas, más de 1.000 especies de peces marinos descritas y una fauna íctica dulceacuícola empobrecida. Sin embargo, la población en general, incluso profesionales desconocen la temática, lo que incide en las decisiones de altos niveles administrativos. Esta es una formación que debe comenzar desde la enseñanza básica. Es necesario hacer un esfuerzo para incentivar proposiciones en las que estén presentes estas temáticas. El tema presentado en el VII Simposio-Taller de Ictiología, a modo de pregunta al escolar: "¿Conoces los peces de Aguas Continentales de Chile?", conformada en una clase desarrollada para estudiantes de 7° y 8° años, podría plantearse como extensión y a modo de ejemplo, en la educación extraescolar o en talleres de ciencias. Propongo a la Asociación de Ictiología de Chile liderar un Programa Nacional de Enseñanza de estos tópicos en el paísA proposal is made to develop basic and specialized topics in ichthyology for a Distance Learning Program for elementary and high school students in Chile. The extension of ichthyological knowledge towards high school education will help to increase the development possibilities of this discipline in Chile. Hopefully this Program may be able to stimulate the Ministry of Education to promote interest towards Chilean marine and freshwater ichthyofauna in such students. The diagnosis about the knowledge that the common citizen has of this type of fauna is quite insufficient. Although Chile is a country with great hydrological resources, an extensive coast, more than 1000 described marine fish species, many hydrological watersheds, and, unfortunately, an impoverished freshwater fish fauna, the population, as a whole, and even professionals, are unaware of this issue, which impinges on high level decisions. This is a formation that should start from elementary education. An attempt to promote proposals involving the ichthyological topics is necessary. The topic "¿Know Continental Freshwater Fishes of Chile?", developed for 7th and 8th grade students, is presented as an extension activity towards extracurricular education or workshops in sciences. I propose that the Chilean Ichthyological Association should lead a National Program of Ichthyology teaching for improving this education topic in the country
- Published
- 2005
30. Análisis de una secuencia didáctica en un estudio sobre Ictiología a través de la lúdica y metodologías activas basadas en el enfoque BNCC y CTSA
- Author
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Passos, Kévila Kelma Nascimento Silva dos and Silva, Milady Renata Apolinário da
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Ludicidade ,Alegría ,Metodologías activas ,BNCC ,Metodologias ativas ,CTSA ,CTES ,Playfulness ,Active methodologies ,Ictiología ,Ichthyology ,Ictiologia - Abstract
For teachers, who have recently been working remotely or with hybrid teaching, the didactic sequence comes with an support tool. The didactic sequence (DS) is not a replacement for lesson plans, as these are mandatory, but it helps the teacher in organizing and meeting the objectives of their classes. Thus, in this work, a didactic sequence for the teaching of science was developed, more precisely in Ichthyology, and its analysis was made based on the CTSA approach and the BNCC, established for the Early Years of Elementary School. Initially, this sequence was made to be applied in Science Teaching, within the context of an Aquaponics Project that would be developed at the Nossa Senhora do Sagrado Coração Support Center (CANSCC) in Itajubá-MG, with emphasis on vertebrates and ichthyology. This DS was developed in 2020, associated with the Semeando Cientistas Project at the Federal University of Itajubá (UNIFEI) with a subsidy from the Pro-Rectory of Extension (PROEX-UNIFEI). It is expected from this didactic sequence, due to the BNCC, that the application of active methodologies, such as stories and games, as well as resources such as dance and the use of playfulness, tends to help positively in the teaching-learning process of Science. The CTES approach, in the didactic sequence, results in the civic education of critical individuals, capable of promoting a sustainable action to preserve the environment, in a harmonious society, which respects values and differences. Para los profesores que han estado trabajando recientemente de forma remota o con la enseñanza híbrida, la secuencia didáctica viene con una herramienta de ayuda. La secuencia didáctica (SD) no sustituye a los planes de estudio, ya que son obligatorios, pero ayuda al profesor a organizar y cumplir los objetivos de sus clases. Así, en este trabajo se desarrolló una secuencia didáctica para la enseñanza de las ciencias, más precisamente en Ictiología, y su análisis se realizó con base en el enfoque CTSA y el BNCC, para el grupo de edad establecido en los Primeros Años de Educación Primaria. Inicialmente, esta secuencia se hizo para ser aplicada en la Enseñanza de las Ciencias, en el contexto de un Proyecto de Acuaponía que se desarrollaría en el Centro de Apoyo Nossa Senhora do Sagrado Coração (CANSCC) en Itajubá-MG, con énfasis en vertebrados e ictiología. Este SD fue desarrollado en 2020, asociado al Proyecto Semeando Cientistas de la Universidad Federal de Itajubá (UNIFEI) con un subsidio de la Pro-Rectoría de Extensión (PROEX-UNIFEI). Se espera de esta secuencia didáctica, debido al BNCC, que la aplicación de metodologías activas, como cuentos y juegos, así como recursos como la danza y el uso de la alegría, tiende a ayudar positivamente en el proceso de enseñanza-aprendizaje de Ciencias. El enfoque de la CTSA, en la secuencia didáctica, resulta en la educación cívica de individuos críticos, capaces de promover una acción sostenible para preservar el medio ambiente, en una sociedad armoniosa, que respeta los valores y las diferencias. Para os docentes, que recentemente tem atuado de maneira remota ou com no ensino híbrido, a sequência didática vem com uma ferramenta de auxílio. A sequência didática (SD) não é uma substituição aos planos de aulas, uma vez que estes são obrigatórios mas auxilia o professor na organização e no atendimento aos objetivos de suas aulas. Desta forma, neste trabalho foi desenvolvido uma sequência didática para o ensino de ciências, mais precisamente em Ictiologia, e sua análise foi feita com base na abordagem CTSA e nas BNCC, estabelecida para os Anos Iniciais do Ensino Fundamental. Inicialmente, esta sequência foi feita para ser aplicada no Ensino de Ciências, tendo como contexto um Projeto de Aquaponia que seria desenvolvido no Centro de Apoio Nossa Senhora do Sagrado Coração (CANSCC) em Itajubá-MG, dando ênfase aos vertebrados e à ictiologia. Esta SD foi desenvolvida no ano de 2020, associada ao Projeto Semeando Cientistas da Universidade Federal de Itajubá (UNIFEI) com subsídio da Pró-Reitoria de Extensão (PROEX-UNIFEI). Espera-se desta sequência didática em função da BNCC, que a aplicação de metodologias ativas, como histórias e jogos, além de recursos como dança e o uso da ludicidade tende a auxiliar positivamente no processo ensino-aprendizagem de Ciências. A abordagem CTSA na sequência didática, resulta na formação cidadã de indivíduos críticos, capazes de promoverem uma ação sustentável para preservação do meio ambiente, em uma sociedade harmoniosa, que respeita valores e as diferenças.
- Published
- 2021
31. Ictiological and geoenvironmental characterization of the São Francisco Falso river basin - South Arm, West of Paraná
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Mayer, Micheli Caroline, Blanco, Daniel Rodrigues, Rocha, Anderson Sandro da, Pletsch, Adelmo Lowe, and Lui, Roberto Laridondo
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CIENCIAS BIOLOGICAS [CNPQ] ,Bacias hidrográficas ,Fishes - Effect of water pollution on ,Peixes - Efeito da poluição da água ,Ciências Ambientais ,Watersheds ,Ichthyology ,Ictiologia - Abstract
As bacias hidrográficas tem se apresentado como principal categoria de análise espacial no contexto dos estudos ambientais. A ampla utilização dos recursos hídricos, no Brasil e no mundo, tem trazido diferentes consequências e impactos ambientais associados à degradação da água e do solo, particularmente em ambientes com grandes interferências antrópicas. Nesse contexto, a dinâmica de um rio determina a estratégia de vida dos peixes. Nesse sentido, os sistemas aquáticos, importantes para a manutenção da vida vêm sofrendo um processo acelerado de deterioração das suas características físicas, químicas e biológicas interferindo, assim, na perda direta da biodiversidade. O presente trabalho teve como objetivo realizar a caracterização geoambiental da bacia do rio São Francisco Falso; verificar os atributos ecológicos das espécies de peixes que ocorrem na área mencionada e investigar as possíveis relações entre as populações de peixes e as variações físiconaturais e limnológicas da bacia. Esta abordagem se torna relevante, pois a análise da biodiversidade local do Rio São Francisco Falso-Braço Sul, no que se refere à comunidade de peixes, aliado aos dados geoambientais possibilitam uma análise da influência de tais fatores sobre o meio aquático e a ictiofauna presente, podendo nortear futuros planos de manejo e conservação do ambiente em questão. Com base nos levantamentos realizados, pode-se concluir que os mapeamentos de caracterização geoambiental, poderão contribuir com a conservação do solo e água da bacia e melhorar a condição do ambiente para a fauna de peixes, bem como servir de base para o planejamento e gestão da bacia do rio São Francisco Falso. Hydrographic basins have been presented as the main category of spatial analysis in the context of environmental studies. The wide use of water resources, in Brazil and in the world, has brought different consequences and environmental impacts associated with water and soil degradation, particularly in environments with great human interference. In this context, the dynamics of a river determines the fish's life strategy. In this sense, aquatic systems, which are important for the maintenance of life, have been undergoing an accelerated process of deterioration of their physical, chemical and biological characteristics, thus interfering with the direct loss of biodiversity. The present work aimed to perform the geoenvironmental characterization of the São Francisco Falso river Basin; verify the ecological attributes of the fish species that occur in the mentioned area and investigate the possible relationships between fish populations and the physico-natural and limnological variations in the basin. In short, this approach becomes relevant, as the analysis of the local biodiversity of the São Francisco Falso River - South Arm, with regard to the fish community, combined with geoenvironmental data enables an analysis of the influence of such factors on the aquatic and the ichthyofauna present, which may guide future management and conservation plans for the environment in question. Based on the surveys carried out, it can be concluded thatthe geoenvironmental characterization mappings will be able to contribute to the conservation of soil and water in the basin and improve the environmental condition for the fish fauna, as well as serve as a basis for planning and management of the São Francisco Falso river Basins.
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- 2021
32. Modified techniques used for microsatellite and AFLP for the population study of divers species at the Sinu river fish, Colombia
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Lamprea Natalia, López Liliana, Santacruz Diana, Guerrero Jimena, and Burbano Consuelo
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ADN ,biología molecular ,genotipificación ,ictiología ,DNA extraction ,molecular biology ,genotypification ,ichthyology. ,Biotechnology ,TP248.13-248.65 - Abstract
Few genetic conservation studies carried out in Colombia have applied molecular biology techniques. Protocols and modifications arising from the genetic study of four fish species from the Sinú river basin are presented as guidelines for future work in this field (and with other species) as laboratory standardisation processes are complex. The original commercial kit's DNA extraction protocols were modified as were those for PCR reactions for obtaining micro-satellite markers and AFLPs, as well as allele genotypification. Particular variations were made f or each of the species studied. Key words: DNA extraction; molecular biology; genotypification; ichthyology.
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- 2004
33. On rivers and the sea in De Antiquitatibus Lusitaniae by André de Resende
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Castro, Inês de Ornellas e
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Ichtyologie ,De Antiquitatibus Lusitaniae ,Alimentação ,Food ,04:Educação de Qualidade [ODS] ,André de Resende ,Ictiologia - Abstract
O De Antiquitatibus Lusitaniae (1593) de André de Resende, uma das obras mais notáveis do humanismo português, revela a erudição de um antiquário pioneiro no campo da Arqueologia e da Epigrafia e com profundo domínio dos textos clássicos, filosóficos, teológicos e bíblicos. Investigou de modo original como nasceu e cresceu Portugal. Ao situar a história no espaço, foi rigoroso na Geografia. Nas referências dispersas sobre agricultura e pecuária, mas sobretudo no livro 2.º dedicado aos rios e respectiva fauna piscícola, em que incide a nossa reflexão, revela um conhecimento implícito das teorias higienistas do seu tempo, manifesto na interdependência entre meio ambiente, homem e alimento. O confronto de obras de arte médica com uma leitura atenta no original permitiu encontrar indícios de um discurso de matriz humoral. André de Resende’s De Antiquitatibus Lusitaniae (1593), one of the most notable works of Portuguese Humanism, reveals the erudition of an antiquarian, pioneer in Archaeology and Epigraphy with a deep domain of classical, philosophical, theological and Biblicaltexts. He investigated in an original way how Portugal had born and grew. When pointing out history in the space, he was rigorous in Geography. In the dispersed references on agriculture and cattle, and especially in the 2end book dedicated to the rivers and respective fish fauna, the focus of our reflection, he discloses to an implicit knowledge of his own time hygienists theories, revealed in the interdependence between environment, man and food. The original Latin text confrontation with medical works allowed us to find indications of an humoural matrix speech. Esta publicação foi financiada por Fundos Nacionais através da FCT — Fundação para a Ciência e a Tecnologia, no âmbito do Projeto UIDB/00077/2020. info:eu-repo/semantics/publishedVersion
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- 2020
- Full Text
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34. Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)
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Ilson Carlos Almeida da Silveira, Igor Uchôa Farias, Claudia Akemi Pereira Namiki, Maria de Lourdes Zani-Teixeira, Mario Katsuragawa, Márcia Salustiano de Castro, and Ana Cristina Teixeira Bonecker
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0106 biological sciences ,Wet season ,biology ,010604 marine biology & hydrobiology ,fungi ,ICTIOLOGIA ,04 agricultural and veterinary sciences ,Maurolicus ,Aquatic Science ,Ichthyoplankton ,biology.organism_classification ,01 natural sciences ,Oceanography ,Clupeidae ,Dry season ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Neuston ,Diel vertical migration ,Sternoptychidae - Abstract
Many marine organisms spend the early life history stages in neuston domain. Although the importance of ichthyoneuston, few studies were developed in the Southwest Atlantic Ocean. Therefore, this study aimed to improve the knowledge on ichthyoneuston of the Brazilian coast analyzing the vertical stratification and horizontal distribution of these organisms. Neuston samples were collected in daylight between 20°S and 23°S from February to April 2009 (late summer/early autumn; rainy season) and from August to September 2009 (late winter/early spring; dry season). Eggs of six taxa were identified: Anguilliformes, Engraulidae, Clupeidae, Synodontidae, Trichiuridae, and Maurolicus stehmanni (Sternoptychidae). The neustonic larval fish assemblage was composed by 40 families and 63 species. Mullidae and Myctophidae larvae were the most abundant in the rainy period while Mullidae and Mugilidae dominated in the dry season. Seasonal and spatial variation of larval fish assemblages in the neuston were structured by oceanographic features. The larval fish abundance on the outer slope stations may have been favored by the advection of an anticyclone that encompassed most of the study region during the cruise periods. In the rainy season, salinity and local depth structured the larval fish assemblage in a cross‐shelf gradient, while in the dry season the larval assemblage was structured around temperature and north‐south gradient. In the dry season, the cross‐shelf gradient was less pronounced mainly because of the low abundance and frequency of mesopelagic larvae. The low frequency and abundance of some species are probably related to the net avoidance of fish larvae during the day or dial vertical migration, as many species migrate to deeper layers during the day and ascend to neuston only at night. Nevertheless, the present study presented baseline information about the seasonal and spatial variation of the neustonic larval fish assemblage influenced by the oceanographic conditions in the Campos Basin. We recommend to additionally collect night samples to decrease larval escapement rates and to compare night versus day catches to further investigate the influence of daily migration in the neustonic larval fish in the area.
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- 2019
- Full Text
- View/download PDF
35. José Celestino Mutis and the gestation of ichthyology in the Viceroyalty of New Granada
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Agudelo Zamora, Henry Dario and Agudelo Zamora, Henry Dario
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José Celestino Mutis, mostly known for his contributions in the botanical field, however; made significant, if little known, scientific additions in fields from mathematics to zoology. In this paper, I present to the public, for the first time, Mutis’ works on ichthyology in the Viceroyalty of New Granada, colonial Spanish title for the northern part of South America including the current countries of Panama, Colombia, Venezuela, and Ecuador, works that, as Linnaeus himself proposed, will be immortalized., José Celestino Mutis, más conocido por sus contribuciones en el campo botánico, sin embargo; hizo aportes científicos significativos, aunque poco conocidos, en campos desde las matemáticas hasta la zoología. En este artículo, presento al público, por primera vez, los trabajos de Mutis sobre ictiología en el Virreinato de Nueva Granada, título colonial español para la parte Norte de América del Sur incluyendo los actuales países de Panamá, Colombia, Venezuela y Ecuador, obras que, como propuso el propio Linneo, lo inmortalizarían.
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- 2021
36. Análise morfológica e molecular de populações de Otocinclus cocama REIS, 2004 (Loricariidae, Siluriformes) na Amazônia Peruana
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Reis, Roberto Esser dos and Reis, Roberto Esser dos
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- 2021
37. Revisão taxonômica de astyanax eigenmanniorum (cope, 1894) com base em caracteres morfológicos (ostariophysi : characiformes : characidae)
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Lucena, Carlos Alberto Santos de and Lucena, Carlos Alberto Santos de
- Published
- 2021
38. Ictiofauna do Parque Nacional da Serra da Bodoquena, Mato Grosso do Sul, Brasil: composição e subsídios à conservação
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Vilela, Maria José Alencar, Severo Neto, Francisco, Carvalho, Fernando Rogério, Froehlich, Otávio, Vilela, Maria José Alencar, Severo Neto, Francisco, Carvalho, Fernando Rogério, and Froehlich, Otávio
- Abstract
The Serra da Bodoquena includes the headwaters of important rivers of the upper Paraguay River basin and constitutes one of the more extensive karst formations in Brazil. The region is an important tourist destination and Serra da Bodoquena National Park (SBNP) was established in 2000. In this work, we provide a list of the ichthyofauna and describe the main water systems in SBNP. Surveys were carried out in August, September and December 2005 using trawl nets, gill nets and electrofishing. For the list of species, we included records made in subsequent studies, resulting in 60 species belonging to seven orders and 21 families, which are all autochthonous to the upper Paraguay River, except the tilapia Coptodon rendalli, the only non-native species. The species richness was higher in the Salobra River basin (49 species, 39 exclusive) compared to the Perdido River basin (15 species, six exclusive). We documented seven endemic species in the Serra da Bodoquena, of which two are threatened with extinction (Vulnerable category): Trichomycterus dali and Ancistrus formoso. As mitigation and preventive measures for environmental impacts, we suggest regularizing land use and increasing environmental education programs as ways of contributing to public policies that are involved in the conservation of aquatic systems and their biotic communities., A Serra da Bodoquena abarca cabeceiras de importantes rios da bacia do alto Paraguai e constitui um dos mais extensos conjuntos cársticos do Brasil. Conhecida como importante destino turístico do Brasil, desde 2000 a região conta com o Parque Nacional da Serra da Bodoquena (PNSB). Apresentamos aqui a ictiofauna e a descrição dos principais sistemas hídricos do PNSB, a partir de levantamentos efetuados em agosto-setembro e dezembro de 2005, com uso de redes de arrasto e espera e com pesca elétrica. Para a lista de espécies acrescentamos registros efetuados em estudos posteriores, resultando em 60 espécies, pertencentes a sete ordens e 21 famílias, todas autóctones do alto rio Paraguai, com exceção da tilápia Coptodon rendalli, única não nativa. A riqueza foi maior na bacia do rio Salobra (49 espécies, 39 exclusivas), em comparação com a bacia do rio Perdido (15 espécies, seis exclusivas). Documentamos sete espécies endêmicas da Serra da Bodoquena, duas ameaçadas de extinção (categoria Vulnerável): Trichomycterus dali e Ancistrus formoso. Como medidas mitigatórias e preventivas de impactos indicamos a regularização da situação fundiária e o incremento de programas de educação ambiental, como formas de subsidiar políticas públicas que colaborem para a conservação dos sistemas aquáticos e suas comunidades bióticas.
- Published
- 2021
39. Caracterização da dieta de Brycon hilarii Valenciennes, 1850 (Characiformes, Characidae) relacionada aos períodos hidrológicos e florestas inundáveis no Pantanal Norte, Estação Ecológica de Taiamã
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Bertolino, Michelle do Espírito Santo, Oliveira Junior, Ernandes Sobreira, Kantek, Daniel Luis Zanella, França, Bruna dos Santos, Aniceto, Alexandre Forgiarini Bastos, and Muniz, Claumir Cesar
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Ictiología ,Erythrina fusca ,Ictiologia ,Conservation unit ,Pulso de inundação ,Unidad de conservación ,Flood pulse ,Ichthyology ,Unidade de conservação ,Piraputanga ,Pulso de inundación - Abstract
Pantanal is one of the largest humid areas in the world, characterized by changes during hydrological cycles, which correspond to periods that alternate during floods and ebbs. This study aimed to analyze the diet of Brycon hilarii (Valenciennes, 1850) in different hydrological periods of the Ecological Station of Taiamã in Mato Grosso, Brazil, a conservation unit of worldwide interest, and its relationship with the formation of vegetation. Were 353 specimens captured in monthly campaigns, during the four hydrological periods, from August 2013 to July 2015, then packed in thermal boxes and sent to the laboratory, where the biometric data and stomach removal were noted for analyzes of food importance (IAi). The results show that Erytrhina fusca Lour. (squash) is the main food item in the B. hilarii diet. During the flood periods, it had an IAi of 95% and at flood 60%. Furthermore, B. hilarii proved to be a generalist in feeding on E. fusca during periods of high, low and dry periods, being a specialist in the period of flood. According to the size of the specimen the volume of intact and crushed seeds in relation to the standard size, it was found that the seeds are ingested according to the size according to the size of the specimen. This fact contributes to the importance of hydrological periods, together with the E. fusca monodominance in the place, which provides an increase in food resources for B. hilarii, through strategies, coinciding with the greater availability of E. fusca in this environment. La técnica de restauración forestal basada en la siembra directa de especies nativas, ha demostrado ser promisoria si se la compara con la técnica más utilizada en la actualidad, que es la siembra de plantones, principalmente porque reduce gastos y mano de obra. El objetivo de este estudio fue evaluar qué técnica de siembra directa (en pozos o lance) es más prometedora, y cuál es la influencia de la transposición de la hojarasca después de la siembra, para la emergencia y establecimiento inicial de la especie nativa Sterculia apetala (Jaqc.) H. Karst. en restauración ecológica en una zona de manantiales degradados en el municipio de Cáceres-MT, Pantanal Mato-Grossense. En este experimento se analizaron dos tecnicas de siembra directa (en pozos y lance) en dos ambientes diferentes (con y sin transposición de hojarasca), utilizando la planta nativa S. apetala. Todas las técnicas de siembra analizadas demostraron ser eficientes, obteniendo buenos porcentajes de emergencia y establecimiento, sin embargo, la siembra directa en fosas con transposición de hojarasca (T2), resultó ser la técnica más eficiente en todos los parámetros evaluados para S. apetala en este experimento. La transposición de hojarasca después de la siembra directa (T2 y T4), mostró una influencia positiva en el establecimiento de plántulas para todos los parámetros analizados, provocando plantas más vigorosas al final del experimento. O pantanal é uma das maiores áreas úmidas do mundo, caracterizada por apresentar alterações durante os ciclos hidrológicos, que correspondem a períodos que se alternam durante enchentes e vazantes. Este estudo teve como objetivo analisar a dieta de Brycon hilarii (Valenciennes, 1850), em diferentes períodos hidrológicos da Estação Ecológica de Taiamã em Mato Grosso Brasil, uma unidade de conservação de interesse mundial, e sua relação com a formação vegetacional. Foram capturados 353 espécimes em campanhas mensais, durante os quatro períodos hidrológicos, nos meses de agosto de 2013 a julho de 2015, em seguida, acondicionados em caixas térmicas e encaminhado para o laboratório, onde foram anotados os dados biométricos e a remoção dos estômagos para as análises de importância alimentar (IAi). Os resultados mostram que Erythrina fusca Lour. (abobreiro) é o principal item alimentar da dieta de B. hilarii. Durante os períodos de enchente, apresentou IAi de 95% e na cheia 60%. Além disso, B. hilarii mostrou ser generalista em se alimentar de E. fusca durante os períodos de cheia, vazante e estiagem, sendo especialista no período de enchente. Com relação do volume de sementes intactas e trituradas comparado ao tamanho padrão, verificou-se que as sementes são ingeridas conforme o tamanho do espécime. Este fato contribui com a importância dos períodos hidrológicos, junto a monodominancia de E. fusca no local, o que propicia o aumento de recursos alimentares para B. hilarii, através de estratégias, coincidindo com a maior disponibilidade de E. fusca neste ambiente.
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- 2021
40. Primer tamaño de maduración de cinco especies de peces en una zona de la Costa Amazónica de Maranhense, Brasil
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Silva, Ádila Patrícia Chaves, Carvalho, Irayana Fernanda da Silva, Diniz, Ana Luiza Caldas, Cantanhêde, Lorrane Gabrielle, and Almeida, Zafira da Silva de
- Subjects
Reprodução ,Ordenación pesquera ,Fisheries management ,Reproduction ,Gestão Pesqueira ,Ictiología ,Reproducción ,Ichthyology ,Ictiologia - Abstract
The present study aimed to determine the sizes of first sexual maturation of five commercial species of an area of the Maranhense Amazon Coast, to be used as an indicator in the fishing order in the region. The first gonadal maturation length (L50) of species: Bagre bagre, Lutjanus synagris, Macrodon ancylodon, Mugil curema and Trichiurus lepturus was estimated from the cumulative curve of frequencies of occurrence of adult individuals by class of total length adjusted to the logistic function. The first gonadal maturation lengths of B. bagre, L. synagris, M. ancylodon, M. curema and T. lepturus were 24.28 cm, 26.52 cm, 19.54 cm, 19.93 cm and 51.45 cm, respectively. Thus, it is suggested to avoid capturing, storage, disembarkation and sale of individuals smaller than the values presented in this study. El presente estudio tuvo como objetivo determinar los tamaños de primera maduración sexual de cinco especies comerciales de un área de la Costa Amazónica Maranhense, para ser utilizado como indicador en la planificación pesquera en la región. La primera longitud de maduración gonadal (L50) de espécies: Bagre bagre, Lutjanus synagris, Macrodon ancylodon, Mugil curema y Trichiurus lepturus se estimó a partir de la curva acumulada de frecuencias de ocurrencia de individuos adultos por clase de longitud total ajustada a la función logística. Las primeras longitudes de maduración gonadal de B. bagre, L. synagris, M. ancylodon, M. curema e T. lepturus fueron 24,28 cm, 26,52 cm, 19,54 cm, 19,93 cm y 51,45 cm, respectivamente. Por tanto, se sugiere evitar capturar, almacenamiento, desembarco y venta de individuos menores a los valores presentados en este estudio. O presente estudo objetivou determinar os tamanhos de primeira maturação sexual de cinco espécies comercias de uma área da Costa Amazônica Maranhense, para serem utilizados como indicador no ordenamento pesqueiro na região. O comprimento de primeira maturação gonadal (L50) das espécies: Bagre bagre, Lutjanus synagris, Macrodon ancylodon, Mugil curema e Trichiurus lepturus foi estimado a partir da curva acumulada de frequências de ocorrência de indivíduos adultos por classe de comprimento total ajustado à função logística. Os comprimentos de primeira maturação gonadal de B. bagre, L. synagris, M. ancylodon, M. curema e T. lepturus foram 24,28 cm, 26,52 cm, 19,54 cm, 19,93 cm e 51,45 cm, respectivamente. Assim, sugere-se evitar a captura, armazenamento, desembarque e venda de indivíduos menores que os valores apresentados neste estudo.
- Published
- 2021
41. Firmground ichnofacies recording high-frequency marine flooding events (Langhian transgression, Vallès-Penedès Basin, Spain)
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Miocè ,Estratigrafia ,Miocene ,Ichnology ,Stratigraphic geology ,Ictiologia - Published
- 2021
42. Revisão taxonômica de astyanax eigenmanniorum (cope, 1894) com base em caracteres morfológicos (ostariophysi : characiformes : characidae)
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Santos, Arthur Alexandre Capelli dos and Lucena, Carlos Alberto Santos de
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ZOOLOGIA ,PEIXES ,PEIXES - TAXIONOMIA ,ICTIOLOGIA - Abstract
Made available in DSpace on 2021-10-09T12:05:13Z (GMT). No. of bitstreams: 1 000500820-Texto+confidencial-0.pdf: 727613 bytes, checksum: ae402c3f0760fb5756646f8ec2c471a4 (MD5) Previous issue date: 2021 Taxonomic review of Astyanax eigenmanniorum (Cope, 1894) based in morphological characters (Ostariophysi: Characiformes: Characidae) Astyanax eigenmanniorum (Cope, 1894) was originally described from Rio Grande do Sul State without a precise type locality. Later, the species was restricted to the Laguna dos Patos system, however no further study on the diagnosis was published since the original description. The aim of this study was to analyze the variation between different populations of Astyanax eigenmanniorum considering its geographical distribution, based on f morphological characters through morphometric and meristic analyses and color pattern of individuals seeking to detect possible distinct lineages. For this purpose, three areas in southern Brazil and Uruguay were selected, because of its endemism level of fish fauna. They are: Tramandaí river system (A1), Laguna dos Patos system (A2), and middle/lower Uruguay river system (A3). Morphometric analyses comprised the traditional measurements and counts, and geometric morphometry. The analyses included 705 specimens examined, deposited in the fish collections of the Museu de Ciências e Tecnologia da Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre (MCP), Museu de Ciências Naturais, Porto Alegre (MCN), Universidad de la Republica, Montevideo (ZVCP), Universidade Estadual de Maringá, Maringá (UEM), Universidade Estadual Paulista, São José do Rio Preto (UNESP), Universidade Federal do Rio Grande do Sul, Porto Alegre (UFRGS) e Universidade São Paulo, Ribeirão Preto, (LIRP). Nineteen measurements of body and head were taken using digital calliper, 14 counts under a stereomicroscope with incident light and 40 cleared and stained individuals were used for the 18 counts, particularly those regarding the number of teeth and cusps, vertebrae and supraneurals. For the geometric morphometry analysis, the specimens were photographed and 11 homologous points on the body were defined to verify possible variations in centroid size and shape. The populations were firstly examined separately considering the presence or absence of hooks on the anal and ventral fins, and the 2nd humeral spot. By confirming the uniformity of results within each area, the data and analyses were conducted between the different areas. Measurement and counts were analyzed with DATAX for Windows software version 1.01, and PAST program (Paleontological Statistics, version 3.12) was used for Principal Components Analysis and the Discriminant Function, aiming to graphically represent the groups formed. The geometric morphometry analyses and graphs were performed in MorphoJ version 1.06 and R version 3.6.1. The results showed some morphological variation between the areas more distant geographically, but without sufficient support to confirm them as a distinct species. The variation range of meristic and morphometric data, and color pattern for the species in relation to what is currently known is expanded. As a result, Astyanax eigenmanniorum is herein redescribed. It is noticeable, by the results achieved, the capacity of adaptation of A. eigenmanniorum to different environments, as well as its phenotypic plasticity. Astyanax eigenmanniorum (Cope, 1894) foi originalmente descrita para o Rio Grande do Sul sem localidade-tipo definida. Posteriormente, a espécie foi restrita para o sistema da laguna dos Patos, porém nenhum estudo mais aprofundado propondo uma diagnose foi publicada desde sua descrição original. O presente estudo teve por objetivo analisar a variação entre as diferentes populações de Astyanax eigenmanniorum considerando sua distribuição geográfica, baseado em caracteres morfológicos, através de análises morfométricas e merísticas e do padrão de colorido buscando assim detectar possíveis linhagens distintas. Para isto, três áreas localizadas no sul do Brasil e Uruguai foram escolhidas por apresentarem algum grau de endemismo em peixes. São elas: sistema do rio Tramandaí (A1), sistema da Laguna dos Patos (A2) e sistema do médio/baixo rio Uruguai (A3). Nas análises morfométricas foram usadas contagens e medidas tradicionais, e morfometria geométrica. Ao todo, foram analisados 705 exemplares depositados nas coleções de peixes do Museu de Ciências e Tecnologia da Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre (MCP), Museu de Ciências Naturais, Porto Alegre (MCN), Universidad de la Republica, Montevideo (ZVCP), Universidade Estadual de Maringá, Maringá (UEM), Universidade Estadual Paulista, São José do Rio Preto (UNESP), Universidade Federal do Rio Grande do Sul, Porto Alegre (UFRGS) e Universidade São Paulo, Ribeirão Preto (LIRP). Foram realizadas 19 medidas corporais e da cabeça com o auxílio de um paquímetro digital, 14 contagens sob o estereomicroscópio com luz incidente e 40 indivíduos diafanizados para a realização de 18 contagens, especialmente quanto ao número de dentes e cúspides, vértebras e supraneurais. Para as análises de morfometria geométrica, os exemplares foram fotografados e realizou-se a marcação de 11 pontos homólogos ao longo do corpo para verificar as possíveis variações de tamanho centroide e forma. As populações foram, inicialmente, examinadas separadamente considerando a presença ou ausência de ganchos nas nadadeiras anal e ventral, e da 2ª mancha umeral. Após confirmar a uniformidade dos resultados dentro de cada área, os dados e as análises foram conduzidos entre as diferentes áreas. Analisou-se os dados de medidas e contagens com os softwares DATAX for Windows versão 1.01 e o programa PAST (Paleontological Statistics, versão 3.12) foi utilizado para a Análise dos Componentes Principais e da Função Discriminante, visando representar graficamente os grupos formados. Para a morfometria geométrica, as análises e gráficos foram elaborados nos softwares MorphoJ versão 1.06 e R software versão 3.6.1. Os resultados mostraram relativa variação morfológica entre as áreas geograficamente mais distantes, sem, no entanto, uma sustentação suficiente para afirmar-se que são espécies distintas. O intervalo de variação dos dados merísticos, morfométricos e do padrão de colorido da espécie em relação ao que se conhece atualmente é expandido. Em consequência, Astyanax eigenmanniorum é aqui redescrita. Fica perceptível, pelos resultados alcançados, a capacidade de adaptação de A. eigenmanniorum a diferentes ambientes, assim como a sua plasticidade fenotípica.
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43. On rivers and the sea in De Antiquitatibus Lusitaniae de André de Resende
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Castro, Inês de Ornellas e, Departamento de Estudos Portugueses (DEP), and Instituto de Estudos de Literatura e Tradição (IELT - NOVA FCSH)
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De antiquitatibus Lusitâniae ,Food ,ichtyologie ,André de Resende ,ictiologia ,alimentação - Abstract
UIDB/00657/2020 UIDP/00657/2020 O De Antiquitatibus Lusitaniae (1593)de André de Resende, uma das obras mais notáveis do humanismo português, revela a erudição de um antiquário pioneiro no campo da Arqueologia e da Epigrafia e com profundo domínio dos textos clássicos, filosóficos, teológicos e bíblicos. Investigou de modo original como nasceu e cresceu Portugal. Ao situar a história no espaço, foi rigoroso na Geografia. Nas referências dispersas sobre agricultura e pecuária, mas sobretudo no livro 2.ºdedicado aos rios e respectiva fauna piscícola, em que incide a nossa reflexão, revela um conhecimento implícito das teorias higienistas do seu tempo, manifesto na interdependência entre meio ambiente, homem e alimento. O confronto de obras de arte médica com uma leitura atenta no original permitiu encontrar indícios de um discurso de matriz humoral. André de Resende's De Antiquitatibus Lusitaniae (1593), one of the most notable works of Portuguese Humanism, reveals the erudition of an antiquarian, pioneer in Archaeology and Epigraphy with a deep domain of classical, philosophical, theological and Biblical texts. He investigated in an original way how Portugal had born and grew. When pointing out history in the space, he was rigorous in Geography. In the dispersed references on agriculture and cattle, and especiallyin the 2end book dedicated to the rivers and respectivefish fauna, the focus of our reflection, he discloses to an implicit knowledge of his own time hygienists theories, revealed in the interdependence between environment, man and food. The original Latin text confrontation with medical worksallowed us to find indications of an humoural matrix speech publishersversion published
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- 2020
44. Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
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João Batista Teixeira, Hudson T. Pinheiro, Caio R. Pimentel, Jean-Christophe Joyeux, Luiz A. Rocha, Ricardo C. Garla, Bart Shepherd, Ronaldo B. Francini-Filho, Carlos Eduardo Stein, Tommaso Giarrizzo, Stephanie D. T. Delfino, José Amorim Reis-Filho, Thayná J. Mello, Tyler A. Y. Phelps, João Luiz Gasparini, and Agnaldo Silva Martins
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Área Marinha Protegida ,Fish species ,Rebreather ,Aquatic Science ,Biology ,Remotely operated vehicle ,Ecosystem ,Ecology, Evolution, Behavior and Systematics ,Marine Protected Area ,geography ,geography.geographical_feature_category ,ICTIOLOGIA ,Oceanic Island ,Marine fish ,BRUVS ,Veículo Operado Remotamente ,Fishery ,QL1-991 ,Archipelago ,%22">Fish ,Animal Science and Zoology ,Marine protected area ,Species richness ,Zoology ,Remotely Operated Vehicle ,Ilha Oceânica - Abstract
Although several studies on the ichthyofauna of the Fernando de Noronha Archipelago have been carried out, its mesophotic fish diversity has never been surveyed before. Here we used SCUBA and technical rebreather diving, baited remote underwater videos and remotely operated vehicle to record shallow (≤ 30 m depth) and mesophotic (31 to 150 m depth) fishes. Nineteen fish species belonging to 14 families are reported here as new records, representing an increase of 8.2% in marine fish richness for the region, which now has a total of 250 species and 77 families. These new records include four potential new species and highlight the importance of surveying mesophotic ecosystems, even in well studied sites. Our results also emphasize the need for protection and attention to the unique ichthyofauna found at mesophotic depths. Resumo Apesar de muitos estudos sobre a ictiofauna do Arquipélago de Fernando de Noronha terem sido realizados, sua diversidade de peixes mesofóticos nunca foi estudada antes. Neste estudo utilizamos mergulho autônomo e mergulho técnico, vídeos subaquáticos remotos com isca e veículo operado remotamente para registrar peixes de ecossistemas rasos (≤ 30 m de profundidade) e mesofóticos (31 a 150 m de profundidade). Dezenove espécies de peixes pertencentes a 14 famílias são apresentadas aqui como novos registros, representando um aumento de 8,2% na riqueza de peixes marinhos da região, que agora possui um total de 250 espécies e 77 famílias. Esses novos registros incluem quatro prováveis novas espécies e reforçam a importância de estudos em ecossistemas mesofóticos. Nossos resultados também enfatizam a necessidade de proteção e atenção à essa ictiofauna única encontrada nesses ecossistemas profundos.
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- 2020
45. Profundulus chimalapensis, una nueva especie de pez ciprinodóntido (Cyprinodontiformes: Profundulidae) del Río Coatzacoalcos, México
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Del Moral Flores, Luis Fernando
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Taxonomía ,Neotrópico ,Peces ,Ictiología ,Sistemática ,Peces, Ictiología, Neotrópico, Sistemática, Taxonomía - Abstract
Profundulus chimalapensis, a new species of cyprinodontid (Cyrpinodontiformes: Profundulidae) from the Coatzacoalcos River, Mexico. Introduction: The Profundulidae family is a representative of the neotropical ichthyofauna of the order Cyprinodontiformes, considered endemic to the Mesoamerican region. It is represented by the genera Tlaloc and Profundulus. Objective: This paper describes a new species, Profundulus chimalapensis sp. nov., endemic to Mexico. Methods: Specimens were collected in the tributaries of the Upper Basin of the Coatzacoalcos River, which were deposited in reference collections. The corresponding body and meristic measurements were obtained, likewise a sample was diafanized and stained for the analysis of its skeletal morphology. Results: The new species differs from its congeners by having the following characters: 13 dorsal fin rays, 16 anal and 15 pectoral rays; dark colored band on the sides; anal fin with a clear distal margin; anterior and posterior margin of the alveolar process of the concave premaxilla; short and wide epiotic processes. Conclusion: A new species of Profundulus with distribution restricted to the Atlantic side of the Isthmus of Tehuantepec is described. Profundulus chimalapensis, una nueva especie de ciprinodóntido (Cyrpinodontiformes: Profundulidae) del Río Coatzacoalcos, México. Introducción. La familia Profundulidae es representante de la ictiofauna neotropical del orden Cyprinodontiformes, se considera endémica de la región Mesoamericana. Está representada por los géneros Tlaloc y Profundulus. Objetivo: En este trabajo se describe una nueva especie, Profundulus chimalapensis sp. nov., endémica de México. Métodos: Se recolectaron ejemplares en los tributarios de la Cuenca superior del Río Coatzacoalcos, los cuales se depositaron en colecciones de referencia. Se obtuvieron las medidas corporales y merística correspondientes, así mismo una muestra fue diafanizada y teñida para el análisis de su morfología esquelética. Resultados: La nueva especie se diferencia de sus congéneres por tener los siguientes caracteres: 13 radios en la aleta dorsal, 16 radios anales y 15 pectorales; banda de color oscuro en los costados; aleta anal con un margen distal claro; margen anterior y posterior del proceso alveolar del premaxilar cóncavo; procesos epióticos cortos y anchos. Conclusión: Se describe una nueva especie de Profundulus con distribución restringida a la vertiente atlántica del Istmo de Tehuantepec.
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46. Registro de echeneis naucrates (Linnaeus, 1758) actinopterygii: echeneidae) na praia de Ponta da Ilha (Ilha de Itaparica), Bahia
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Paulo Roberto Duarte Lopes, Jailza Tavares de Oliveira-Silva, Claudiana Barbosa Sousa, Denia Barbosa Kieronski, and Ana Paula Silva Oliveira
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brotula barbata ,lcsh:H1-99 ,General Medicine ,lcsh:Social sciences (General) ,lcsh:Science (General) ,ictiologia ,alimentação de peixes ,lcsh:Q1-390 - Abstract
Echeneis naucrates Linnaeus, 1758 é a espécie mais comum da família Echeneidae (Actinopterygii). É apresentada a ocorrência desta espécie associada à uma praia arenosa (Praia de Ponta da Ilha, cerca de 13°07´S - 38°45´W) no sul da Ilha de Itaparica (litoral do estado da Bahia, Brasil, Oceano Atlântico ocidental) com base em 1 exemplar medindo 179,0 mm de comprimento padrão. Dados merísticos e biométricos são apresentados e diferenças são discutidas.
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47. Notas sobre a alimentação de juvenis de caranx latus agassiz, 1831 e de três espécies de trachinotus lacepède, 1801 (actinopterygii: carangidae) na praia de Ponta da Ilha de Itaparica, Bahia)
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Gabriella Sousa Bispo, Paulo Roberto Duarte Lopes, Braz Tavares da Hora Júnior, Renata Rúbia Carvalho Araújo, Alexandre Lucas Lima da Silva, and Jailza Tavares de Oliveira-Silva
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ponta da ilha ,caranx latus agassiz ,bahia ,lcsh:H1-99 ,General Medicine ,lcsh:Social sciences (General) ,lcsh:Science (General) ,ictiologia ,alimentação de peixes ,lcsh:Q1-390 - Abstract
Foram analisados os conteúdos gastro-intestinais de 60 exemplares de Caranx latus, 41 de Trachinotus carolinus, 4 de T. falcatus e 9 de T. goodei (Actinopterygii, Carangidae) coletados na Praia de Ponta da Ilha (sul da Ilha de Itaparica, cerca de 13o07’S - 38o45’W, Bahia). Em ocorrência, para C. latus, matéria orgânica digerida (MOD, 100,0%) e matéria inorgânica (30,0%); em T. carolinus, restos de Crustacea (46,3%) e MOD (43,9%); para T. falcatus, Copepoda, Isopoda, Amphipoda e restos de vegetais superiores (50,0% cada) e em T. goodei, restos de Crustacea, Bivalva e restos de vegetais superiores (44,4% cada).
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48. Notas sobre a alimentação de peixes (actinopterygii) da praia do Malhado, Ilhéus (Bahia). ii. diplectrum radiale (quoy & gaimard, 1824), rypticus randalli courtenay, 1967 e trichiurus lepturus innaeus, 1758 (teleostei: serranidae, trichiuridae)
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Paulo Roberto Duarte Lopes, Jailza Tavares de Oliveira-Silva, Ideval Pires Fernandes, Fernandes Elaine Souza Messias, and Tamires Bastos dos Santos
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alimentação de peixe ,diplectrum radiale ,rypticus randalli ,lcsh:H1-99 ,General Medicine ,lcsh:Social sciences (General) ,lcsh:Science (General) ,ictiologia ,lcsh:Q1-390 - Abstract
São apresentados aspectos da biologia (alimentação e gônadas) de Diplectrum radiale, Rypticus randalli (Actinopterygii: Serranidae) e Trichiurus lepturus (Actinopterygii: Trichiuridae) com base em 98 exemplares (5 de D. radiale,19 de R. randalli e 74 de T. lepturus) capturados entre novembro de 2003 e dezembro de 2006 na Praia do Malhado, município de Ilhéus, litoral sul do estado da Bahia (nordeste do Brasil).
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49. Notas sobre a alimentação de polydactylus virginicus (linnaeus, 1758) (actinopterygii: polynemidae) na praia do Malhado, Ilhéus (Bahia) Paulo Roberto Duarte Lopes
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Paulo Roberto Duarte Lopes, Jailza Tavares de Oliveira-Silva, and Ideval Pires Fernandes
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polydactylus virginicus ,praia do malhado ,ilhéus ,lcsh:H1-99 ,General Medicine ,lcsh:Social sciences (General) ,lcsh:Science (General) ,ictiologia ,alimentação de peixe ósseo ,lcsh:Q1-390 - Abstract
São apresentados aspectos da alimentação de Polydactulus virginicus (Actinopterygii: Polynemidae) com base em 104 exemplares capturados entre agosto de 2004 e agosto de 2006 na Praia do Malhado, município de Ilhéus, litoral sul do estado da Bahia (nordeste do Brasil). Crustacea Decapoda foi a principal categoria alimentar em ocorrência (82,7%) e em número (72,7%).
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50. Nota sobre a alimentação de juvenis de Sele Vomer (linnaeus, 1758) (actinopterygii: carangidae) na praia de ponta da ilha (ilha de itaparica, bahia) com observações sobre a morfologia do tubo digestivo
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Jailza Tavares de Oliveira-Silva and Paulo Roberto Duarte Lopes
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alimentação de peixe ,bahia ,praia de ponta da iiha ,ilha de itaparica ,lcsh:H1-99 ,General Medicine ,sele vomer (linnaeus ,lcsh:Social sciences (General) ,lcsh:Science (General) ,ictiologia ,lcsh:Q1-390 - Abstract
Foram analisados o conteúdo gastro-intestinal e aspectos morfológicos do tubo digestivo de 33 exemplares de Selene vomer (Linnaeus, 1758) (Actinopterygii, Carangidae) (comprimento padrão variando entre 81,0-124,0 mm) coletados na Praia de Ponta da Ilha (sul da Ilha de Itaparica, estado da Bahia, litoral nordeste do Brasil) entre abril e junho de 1997. Foram identificados 7 itens alimentares com predomínio de formas jovens de Decapoda em ocorrência e em número.
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- 2020
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