12 results on '"Espino, Fernando"'
Search Results
2. Abundance and biomass of the parrotfish Sparisoma cretense in seagrass meadows: temporal and spatial differences between seagrass interiors and seagrass adjacent to reefs
- Author
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Espino, Fernando, González, José A., Haroun, Ricardo, and Tuya, Fernando
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- 2015
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3. Distribution and population structure of the smooth‐hound shark, Mustelus mustelus (Linnaeus, 1758), across an oceanic archipelago: Combining several data sources to promote conservation.
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Espino, Fernando, González, José Antonio, Bosch, Néstor E., Otero‐Ferrer, Francisco J., Haroun, Ricardo, and Tuya, Fernando
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SHARKS , *ARCHIPELAGOES , *TERRITORIAL waters , *WATER springs , *ENDANGERED species , *WATER depth - Abstract
Sharks play a key role in the structure and functioning of marine ecosystems. More ecological information is essential to implement responsible management and conservation actions on this fauna, particularly at a regional level for threatened species. Mustelus mustelus is widely found in the eastern Atlantic Ocean and catalogued as "Vulnerable" by the IUCN European assessment. In this study, data on the distribution and population structure of this species across the islands of the Canarian archipelago, located along an east to west gradient in the north‐eastern Atlantic, were collected by taking advantage of "Local Ecological Knowledge," in terms of sightings in coastal waters and long‐term imprints on the local gastronomic heritage, and decadal fisheries landings. Both sources of quantitative data (sightings and fisheries landings) demonstrated that adults of M. mustelus has a significantly larger presence in the eastern and central, than in the western islands of the archipelago. This is also reflected on local gastronomic legacies, with a larger number of recipes in the eastern and central islands. Adult smooth‐hound sharks were significantly more observed in sandy and sandy‐rocky bottoms, with individuals seen throughout the entire year, whereas juveniles aggregate on very shallow waters in spring and summer. Such aggregations require a special management strategy, as they play a key role in critical life stages; these sites should be protected from human perturbations. We also suggest a temporal fishing ban between April and October, when individuals tend to concentrate on nearshore waters. Because of the large differences in presence of this shark among the Canary Islands, management of the species should be adapted to the specific peculiarities of each island, rather than adopting a management policy at the entire archipelago‐scale. Overall, this study sets the basis for further investigation to promote conservation of this vulnerable shark in the study region. [ABSTRACT FROM AUTHOR]
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- 2022
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4. Explosión demográfica de un hidrozoo exótico en una isla oceánica
- Author
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Espino, Fernando, Otero-Ferrer, Francisco J., Bosch, Néstor E., Coca, Josep, Haroun, Ricardo, Tuya, Fernando, Excellence International Campus of the Canary Islands (CEI-Canarias), Agency for Research, Innovation and Information Society of the Canary Islands, and EcoAqua European project (ERA CHAIR programme - Grant Agreement no. 621341)
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especie exótica ,hidrozoo ,colonización ,hábitats costeros ,Islas Canarias ,non-indigenous species ,hydrozoan ,colonization ,nearshore habitats ,Canary Islands - Abstract
The arrival of non-indigenous species into new areas is one of the main processes altering the oceans globally. Macrorhynchia philippina is a large-sized colonial hydrozoan of an invasive nature. To obtain a deeper understanding of the process of colonization of new areas, it is essential to describe the ecological pattern through scales of temporal and spatial variation. In this study, we describe the colonization by M. Philippina of an oceanic island (Gran Canaria Island, Canary Islands, eastern Atlantic). We describe the abundance and size structure patterns of M. Philippina in three nearshore habitats, rocky reefs, seagrass meadows and rhodolith seabeds, at times before (2014), during (2016) and after (2017) the demographic explosion of this species. On rocky reefs and rhodolith seabeds, the abundance of colonies increased dramatically in 2017 relative to 2014, e.g. from 0 to 138 colonies/100 m2. On seagrass meadows, however, the colonies were smaller. In summary, M. Philippina shows an ecological plasticity to rapidly colonize different types of nearshore habitats, but with varying success., La aparición de especies exóticas es uno de los principales factores que alteran los océanos de forma global. Macrorhynchia philippina es un hidrozoo colonial de tamaño grande y naturaleza invasora. Para tener un mejor conocimiento del proceso de colonización es fundamental describir los patrones ecológicos a escalas de variación temporal y espacial. En este estudio, describimos el proceso de colonización por M. Philippina en una isla oceánica (Gran Canaria, Islas Canarias, Atlántico oriental). Se describen los patrones de abundancia y estructura de tallas de M. Philippina en tres hábitats costeros: arrecifes rocosos, praderas de fanerógamas marinas y fondos de rodolitos, antes (2014), durante (2016) y después (2017) de la explosión demográfica de la especie. Sobre arrecifes rocosos y en fondos de rodolitos, la abundancia de las colonias se incrementó drásticamente en 2017 con relación a 2014, e.g. desde 0 hasta 138 colonias/100 m2; este incremento fue menor en las praderas de fanerógamas marinas. En las praderas marinas, la longitud de las colonias fue más pequeña que sobre arrecifes rocosos y fondos de rodolitos. Consecuentemente, la colonización rápida por M. Philippina demuestra su plasticidad ecológica para colonizar diferentes tipos de hábitats costeros, aunque con diferente éxito.
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- 2020
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5. Trends of the seagrass Cymodocea nodosa (Magnoliophyta) in the Canary Islands: population changes in the last two decades
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Fabbri, Federico, Espino, Fernando, Herrera, Rogelio, Moro, Leopoldo, Haroun, Ricardo, Riera, Rodrigo, González-Henriquez, Nieves, Bergasa, Oscar, Monterroso, Oscar, Ruiz de la Rosa, Manuel, and Tuya, Fernando
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seagrass ,population trend ,temporal patterns ,change rates ,Canary Islands ,Atlantic Ocean ,fanerógamas marinas ,tendencia poblacional ,patrones temporales ,tasa de cambio ,islas Canarias ,Océano Atlántico - Abstract
Seagrass meadows perform essential ecosystem functions and services. Though the meadows are globally deteriorating, numerous regressions remain unreported as a result of data fragmentation. Cymodocea nodosa is the most important seagrass in shallow coastal waters of the Canary Islands. No study has so far investigated temporal population trends at the entire archipelago scale. Using data collected in the past 23 years by local companies, public authorities and research groups, the population trends of Cymodocea nodosa were analysed over the past two decades at the scales of islands, island sectors and meadows. During this period, a prevalence of negative trends was revealed for three seagrass demographic descriptors (seagrass shoot density, coverage and leaf length) at the three scales, evidencing an overall deterioration in seagrass meadow integrity. These results suggest the need to develop correct management strategies to guarantee the conservation of this seagrass and the meadows it creates., Las praderas de fanerógamas marinas suministran funciones y servicios esenciales para los ecosistemas. A pesar de que dichas praderas están globalmente deteriorándose, numerosas regresiones son aún desconocidas como resultado de la falta de datos. Cymodocea nodosa es la fanerógama marina más importante en aguas someras de las costas del Archipiélago Canario. No obstante, ningún estudio ha analizado las tendencias temporales de sus poblaciones a escala de todo el archipiélago. Utilizando datos recogidos durante los últimos 23 años por empresas, administraciones públicas y grupos de investigación, se analizaron las tendencias de las poblaciones de Cymodocea nodosa durante las últimas dos décadas en el Archipiélago Canario a la escala de islas, sectores insulares y praderas individuales. A lo largo de este periodo, se observa una prevalencia de tendencias negativas para tres descriptores demográficos (densidad de haces, cobertura y longitud de hoja), evidenciando un deterioro general en la integridad de las praderas. Estos resultados sugieren la necesidad de desarrollar estrategias de gestión correctas para garantizar la conservación de las praderas constituidas por esta planta marina.
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- 2015
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6. New records of non-indigenous fishes (Perciformes and Tetraodontiformes) from the Canary Islands (north-eastern Atlantic).
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TRIAY-PORTELLA, Raül, PAJUELO, José G., MANENT, Pablo, ESPINO, Fernando, RUIZ-DÍAZ, Raquel, LORENZO, José M., and GONZÁLEZ, José A.
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INTRODUCED species ,SERRANIDAE ,POMACENTRIDAE ,SURGEONFISHES ,MONACANTHIDAE ,DRILLING platforms - Abstract
Copyright of Cybium: International Journal of Ichthyology is the property of Societe Francaise d'Ichtyologie (SFI) 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
- 2015
7. Length-weight relationships of ten teleost fish species from seagrass meadows at the Canary Islands (North-eastern Atlantic).
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ESPINO, Fernando, TRIAY-PORTELLA, Raül, GONZÁLEZ, José A., HAROUN, Ricardo, and TUYA, Fernando
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FISH growth , *FISH development , *SIZE of fishes , *OSTEICHTHYES , *CYMODOCEACEAE - Abstract
A paper which offered length-weight relationships (LWRs) of 10 fish species inhabiting seagrass meadows constituted by the marine angiosperm Cymodocea nodosa (Ucria) Ascherson from the Canary Islands is presented. The species considered in the study include Bothus podas, Xyrichtys novacula, Mullus surmuletus and Diplodus annularis. Topics covered include LWRs data for the teleost species and growth type inferred of the present LWRs data.
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- 2016
8. Geographical Range Extension of the Spotfin burrfish, Chilomycterus reticulatus (L. 1758), in the Canary Islands: A Response to Ocean Warming?
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Espino, Fernando, Tuya, Fernando, del Rosario, Armando, Bosch, Néstor E., Coca, Josep, González-Ramos, Antonio J., del Rosario, Francisco, Otero-Ferrer, Francisco J., Moreno, Ángel C., and Haroun, Ricardo
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OCEAN temperature , *TROPICAL conditions , *ISLANDS , *CANARIES , *REEF fishes , *GEOGRAPHICAL distribution of fishes , *CORAL reef conservation - Abstract
In recent decades, numerous marine species have changed their distribution ranges due to ocean warming. The Spotfin burrfish, Chilomycterus reticulatus, is a reef fish with a global distribution along tropical, subtropical and warm-temperate areas of the Pacific, Indian and Atlantic oceans. In this work, we analyzed the presence of this species, between 1990 and 2019, at two islands of the Canarian Archipelago under varying oceanographic conditions: El Hierro (the westernmost island, under more tropical conditions) and Gran Canaria (a central-east island, under more cooler conditions). We expected that, under increased ocean temperatures in recent decades, the number of sightings has increased in Gran Canaria relative to El Hierro. We compiled information from different sources, including interviews and local citizenship databases. A total of 534 sightings were reported: 38.58% from El Hierro and 61.43% from Gran Canaria. The number of sightings on Gran Canaria has significantly increased through time, at a rate of 0.1 sightings per year; at El Hierro, however, the number of sightings has not significantly changed over time. Sea Surface Temperature has linearly increased in both El Hierro and Gran Canaria islands over the last three decades. Positive Sea Surface Temperature anomalies, particularly in 1998 and 2010, including high winter minimum temperatures, provide an ideal oceanographic context to favour the arrival of new individuals and, consequently, the increase in the number of sightings in Gran Canaria. Still, potential donor areas of fish recruits remain unknown. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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9. Drastic decadal decline of the seagrass Cymodocea nodosa at Gran Canaria (eastern Atlantic): Interactions with the green algae Caulerpa prolifera
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Tuya, Fernando, Hernandez-Zerpa, Harue, Espino, Fernando, and Haroun, Ricardo
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SEAGRASSES , *GREEN algae , *BIOMASS estimation , *STATISTICAL correlation , *POPULATION biology , *ENVIRONMENTAL impact analysis - Abstract
Abstract: The shoot density, leaf length and biomass of the seagrass Cymodocea nodosa (Ucria) Ascherson were found to severely decline in the last 17 years in the oceanic island of Gran Canaria (central Eastern Atlantic). Five seagrass meadows were sampled in summer and winter of 1994–1995 and in winter and summer 2011. The decrease in C. nodosa correlated with a 3-fold increase in the biomass of the green rhizophytic algae Caulerpa prolifera (Forsskål) J.V. Lamoroux over the same time period, although this increase varied notably among meadows. We also documented a negative correlation between the biomass of C. nodosa and C. prolifera at the island-scale, sampling 16 meadows in 2011. Experimental evidence demonstrated that C. prolifera can cause significant negative impacts on C. nodosa: plots with total (100%) removals of C. prolifera had ca. 2.5 more shoots and 3.5 times more biomass of C. nodosa, after 8 months, compared to plots with 50% removals and untouched control plots. Interference by C. prolifera appears to partially explain the decay in the abundance of C. nodosa populations in Gran Canaria. This study, however, did not identify potential underlying processes and/or environmental alterations that may have facilitated the disappearance of C. nodosa. [Copyright &y& Elsevier]
- Published
- 2013
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10. Seagrass paleo-biogeography: Fossil records reveal the presence of Halodule cf. in the Canary Islands (eastern Atlantic).
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Tuya, Fernando, Betancort, Juan F., Haroun, Ricardo, Espino, Fernando, Lomoschitz, Alejandro, and Meco, J.
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SEAGRASSES , *EFFECT of climate on aquaculture , *ANGIOSPERMS , *PALEOBIOGEOGRAPHY , *FOSSILS - Abstract
The recognition of marine vegetation in the fossil record brings useful information about past environmental conditions. The paleo-biogeography of seagrasses is largely unknown, since fossilized materials are rare. In this study, we report the existence of fossil deposits of a seagrass species, Halodule cf., at Gran Canaria Island (28° N, northeastern Atlantic). The identification was confirmed by the presence of fossilized plagiotrophic rhizomes and fruits/seeds in sedimentary deposits from the early Pliocene. This seagrass fossilized material is the first from the West African coasts. The presence of this seagrass in the Canary Islands is linked with warm-water conditions during the Pliocene. [ABSTRACT FROM AUTHOR]
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- 2017
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11. Decadal changes in the structure of Cymodocea nodosa seagrass meadows: Natural vs. human influences.
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Tuya, Fernando, Ribeiro-Leite, Luís, Arto-Cuesta, Noelia, Coca, Josep, Haroun, Ricardo, and Espino, Fernando
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CYMODOCEACEAE , *SEAGRASSES , *ARCHIPELAGOES , *OCEAN temperature , *CHLOROPHYLL - Abstract
Abstract: Seagrass meadows are deteriorating worldwide. However, numerous declines are still unreported, which avoid accurate evaluations of seagrass global trends. This is particularly relevant for the western African coast and nearby oceanic archipelagos in the eastern Atlantic. The seagrass Cymodocea nodosa is an ‘ecological engineer’ on shallow soft bottoms of the Canary Islands. A comparative decadal study was conducted in 21 C. nodosa seagrass meadows at Gran Canaria Island to compare the structure (shoot density, leaf length and cover) between 2003 and 2012. Overall, 11 meadows exhibited a severe regression, while 10 remained relatively stable. During this period, natural influences (sea surface temperature, Chlorophyll-a concentration and PAR light, as well as the number of storm episodes detaching seagrasses) had a low predictive power on temporal patterns in seagrass structure. In contrast, proximity from a range of human-mediated influences (e.g. the number of outfalls and ports) seem to be related to the loss of seagrass; the rate of seagrass erosion between 2003 and 2012 was significantly predicted by the number of human-mediated impacts around each meadow. This result highlights promoting management actions to conserve meadows of C. nodosa at the study region through efficient management of local impacts. [Copyright &y& Elsevier]
- Published
- 2014
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12. Seagrass Cymodocea nodosa across biogeographical regions and times: Differences in abundance, meadow structure and sexual reproduction.
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Máñez-Crespo, Julia, Tuya, Fernando, Fernández-Torquemada, Yolanda, Royo, Laura, Pilar-Ruso, Yoana del, Espino, Fernando, Manent, Pablo, Antich, Laura, Castejón-Silvo, Inés, Curbelo, L., de la Ossa, José A., Hernan, Gema, Mateo-Ramírez, Ángel, Pereda-Briones, Laura, Jiménez-Ramos, Rocío, Egea, Luis G., Procaccini, Gabriele, Terrados, Jorge, and Tomas, Fiona
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SEAGRASSES , *MEADOWS , *PHENOTYPIC plasticity , *REPRODUCTION - Abstract
Seagrasses are key habitat-forming species of coastal areas. While previous research has demonstrated considerable small-scale variation in seagrass abundance and structure, studies teasing apart local from large-scale variation are scarce. We determined how different biogeographic scenarios, under varying environmental and genetic variation, explained variation in the abundance and structure (morphology and biomass allocation), epiphytes and sexual reproduction intensity of the seagrass Cymodocea nodosa. Regional and local-scale variation, including their temporal variability, contributed to differentially explain variation in seagrass attributes. Structural, in particular morphological, attributes of the seagrass leaf canopy, most evidenced regional seasonal variation. Allocation to belowground tissues was, however, mainly driven by local-scale variation. High seed densities were observed in meadows of large genetic diversity, indicative of sexual success, which likely resulted from the different evolutionary histories undergone by the seagrass at each region. Our results highlight that phenotypic plasticity to local and regional environments need to be considered to better manage and preserve seagrass meadows. • Seagrasses are key habitat-forming species worldwide. • Different biogeographic scenarios explain variation in seagrass structure. • Attributes of seagrass leaf canopy evidenced regional seasonal variation. • Belowground allocation was driven by local-scale variation. • High seed densities occurred in meadows of high genetic diversity. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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