110 results on '"Isacch, Juan Pablo"'
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2. Owls and the City: The Breeding Performance of Burrowing Owls Athene cunicularia is Better in Urban Than in Rural Areas
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Cavalli, Matilde, primary, Baladrón, Alejandro Víctor, additional, Bó, María Susana, additional, and Isacch, Juan Pablo, additional
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- 2023
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3. Effects of Cattle Grazing and Fire on the Abundance, Habitat Selection, and Nesting Success of the Bay-capped Wren-Spinetail ( Spartonoica maluroides ) in Coastal Saltmarshes of the Pampas Region
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Cardoni, Daniel Augusto, Isacch, Juan Pablo, and Iribarne, Oscar
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- 2012
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4. Different Grazing Strategies Are Necessary to Conserve Endangered Grassland Birds in Short and Tall Salty Grasslands of the Flooding Pampas
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Isacch, Juan Pablo and Cardoni, Daniel Augusto
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- 2011
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5. Habitat Use by Non-Breeding Shorebirds in Flooding Pampas Grasslands of Argentina
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Isacch, Juan Pablo and Martínez, Mariano Manuel
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- 2003
6. Owls and the City: The Breeding Performance of Burrowing Owls Athene cunicularia is Better in Urban Than in Rural Areas.
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Cavalli, Matilde, Baladrón, Alejandro Víctor, Bó, María Susana, and Isacch, Juan Pablo
- Abstract
Urbanisation is a drastic process of environmental modification that often causes negative impacts on wildlife. Effects are diverse, ranging from local extinction to changes in behaviour, life-history traits and physiology. Urban settings represent a great challenge for survival since in such environments selective pressures often differ from those in which species have evolved. However, some species could perceive urban settings as ecological opportunities and may benefit there from anthropogenic food sources, low predation pressures and more stable temperatures among other factors. The Burrowing Owl Athene cunicularia is a small raptor that lives in native short grass areas but is also found in these modified habitats. We compared phenology, breeding parameters (productivity, clutch size and nest success) and breeding behaviour of Burrowing Owls nesting in urban and rural areas. We monitored 89 nests in urban areas and 45 in rural areas over the breeding season (September-January). Weekly, we recorded the breeding stage and the number of adults and chicks at each nest. We used mini HD video-cameras to monitor breeding behaviour and parental care. We found that the breeding period of urban Burrowing Owls was longer than rural owls. Clutch size and productivity were similar for both urban and rural habitats, but urban owls showed greater nesting success compared to rural owls. Rural owls devoted more time to nest vigilance in comparison to urban owls during the incubation stage, thus suggesting a difference in predator pressure between urban and rural areas. All these results indicate that urban settings offer opportunities for Burrowing Owls and that urban characteristics seem to enhance owl breeding performance.—Cavalli, M., Baladrón, A.V., Bó, M.S. & Isacch, J.P. (2024). Owls and the city: the breeding performance of Burrowing Owls Athene cunicularia is better in urban than in rural areas. Ardeola, 71: 81-100. La urbanización es un proceso drástico de modificación ambiental que a menudo genera impactos negativos para la fauna nativa. Sus efectos son diversos, desde extinciones locales a cam-bios en comportamiento, rasgos de historia de vida y fisiología. Los ambientes urbanos representan un gran desafío para la supervivencia ya que en estos ambientes las presiones selectivas suelen diferir de aquellas en los que han evolucionado. Sin embargo, algunas especies podrían percibir los ambientes urbanos como oportunidades ecológicas y podrían beneficiarse de fuentes de alimento de origen antrópico, bajas presiones de depredación, y temperaturas atenuadas, entre otras características. El mochuelo de madriguera Athene cunicularia (denominado lechucita vizcachera en Argentina) es un ave rapaz de pequeño tamaño que habita ambientes nativos de pasto corto, pero también habita ambientes modificados. En este estudio, comparamos la fenología reproductiva, parámetros reproductivos (productividad, tamaño de nidada y éxito reproductivo) y el comportamiento reproductivo de los ejemplares de esta especie nidificando en ambientes urbanos y rurales. Monitoreamos 89 nidos en ambientes urbanos y 45 en ambientes rurales durante el periodo reproductivo (septiembre-enero). Realizamos seguimiento de los nidos con frecuencia semanal y registramos el estadio reproductivo y el número de adultos y pollos en cada nido. Asimismo, registramos el comportamiento reproductivo y cuidado parental mediante minivideocámaras de alta definición. Encontramos que el período reproductivo de los mochuelos de madriguera urbanos fue más largo que el de los rurales. El tamaño de nidada y la productividad fueron similares entre ambos ambientes, sin embargo, los ejemplares urbanos mostraron un mayor éxito reproductivo que los rurales. En cambio, los rurales dedicaron más tiempo a la vigilancia del nido que los urbanos durante la incubación, lo que sugiere una diferencia en la presión de depredación entre áreas urbanas y rurales. Estos resultados indican que los ambientes urbanos podrían representar oportunidades para los mochuelos de madriguera y que las características urbanas parecen favorecer el desempeño reproductivo de esta especie.—Cavalli, M., Baladrón, A.V., Bó, M.S. e Isacch, J.P. (2024). Las lechuzas y la ciudad: el desempeño reproductivo de los mochuelos de madriguera es mejor en ambientes urbanos que en rurales. Ardeola, 71: 81-100. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Respuesta diferencial de la Lechucita Vizcachera (Athene cunicularia) a vocalizaciones heteroespecíficas
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Baladrón, Alejandro V., primary, Cavalli, Matilde, additional, Bó, María Susana, additional, and Isacch, Juan Pablo, additional
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- 2023
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8. Nectarivorous Feeding by Shiny Cowbirds: A Complex Feeding Innovation
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Isacch, Juan Pablo
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- 2002
9. Diversity and Habitat Distribution of Birds in Coastal Marshes and Comparisons with Surrounding Upland Habitats in Southeastern South America
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Isacch, Juan Pablo, Cardoni, Daniel Augusto, and Iribarne, Oscar Osvaldo
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- 2014
10. Avian Biodiversity and Frugivory in an Agroecological Cherry Orchard in The Pampas Region of Argentina
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O'Connor, Tomás, primary, García, Germán Ó., additional, and Isacch, Juan Pablo, additional
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- 2022
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11. High abundance and diversity of consumers associated with eutrophic areas in a semi-desert macrotidal coastal ecosystem in Patagonia, Argentina
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Martinetto, Paulina, Daleo, Pedro, Escapa, Mauricio, Alberti, Juan, Isacch, Juan Pablo, Fanjul, Eugenia, Botto, Florencia, Piriz, Maria Luz, Ponce, Gabriela, Casas, Graciela, and Iribarne, Oscar
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- 2010
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12. The distribution and conservation of birds of coastal salt marshes
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Greenberg, Russell, primary, Cardoni, Augusto, additional, Ens, Bruno J., additional, Gan, Xiaojing, additional, Isacch, Juan Pablo, additional, Koffijberg, Kees, additional, and Loyn, Richard, additional
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- 2014
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13. Implementing the biosphere reserve concept: the case of Parque Atlántico Mar Chiquito biosphere reserve from Argentina
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Isacch, Juan Pablo
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- 2008
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14. Autumn–winter bird flocks in agroecosystems of the southeastern Pampas region, Argentina
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Pretelli, Matías Guillermo, Baladron Felix, Alejandro Victor, Cardoni, Daniel Augusto, and Isacch, Juan Pablo
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purl.org/becyt/ford/1 [https] ,Ciencias Biológicas ,BANDADAS ,Zoología, Ornitología, Entomología, Etología ,purl.org/becyt/ford/1.6 [https] ,AVES ,INVIERNO ,PAMPAS ,CIENCIAS NATURALES Y EXACTAS - Abstract
La conformación de bandadas de aves es un fenómeno ampliamente distribuido en diferentes hábitats alrededor del mundo. Sin embargo, la caracterización de bandadas en cuanto a composición y ocurrencia ha sido poco estudiada en agroecosistemas templados. El objetivo de este estudio fue describir la formación de bandadas en la Región Pampeana de Argentina, donde los pastizales originales han sido transformados mayormente en agroecosistemas, identificando qué especies se agrupan en bandadas, número y tamaño de bandadas, y sobre qué usos de la tierra en particular se congregan. Durante otoño e invierno de 2016 se realizaron relevamientos de bandadas sobre diferentes ambientes, incluyendo distintos usos de la tierra (cultivos y pasturas), bordes de caminos y pastizales naturales. Se censaron 8165 individuos agrupados en 180 bandadas, de las cuales 96% fueron monoespecíficas y el 4% restante mixtas. Veintisiete especies conformaron bandadas monoespecíficas, y sólo 4 especies bandadas mixtas. Los tamaños de las bandadas variaron entre 3 y ca. 800 individuos. La mayor riqueza específica y número de bandadas ocurrieron en campos de pastoreo, cultivos de maíz, y en rastrojos de maíz y girasol. La mayor abundancia de aves se concentró en el cultivo y rastrojo de maíz, cultivo de sorgo y campos de pastoreo, los cuales contuvieron el 65% del total de individuos. Detectamos bandadas de especies granívoras, insectívoras y omnívoras, las cuales se asociaron con determinados ambientes y usos de la tierra en función de su principal tipo de dieta. La heterogeneidad del paisaje en el área de estudio estaría ofreciendo una variedad de recursos de forrajeo para especies con distintos requerimientos tróficos y que se agrupan durante un período del año en el cual el alimento naturalmente disminuye. Los resultados de este trabajo evidencian la necesidad de fomentar la diversificación de usos de la tierrapara sostener la mayor biodiversidad posible en los agroecosistemas pampeanos. Bird-flocking is a widespread behavior in different habitats around the world. However, the characterization of flocks in terms of composition and occurrence has been little studied in temperate agroecosystems. The objective of this study was to describe flocking behaviour in the Pampas region of Argentina, where native grasslands have been replaced by agroecosystems, by identifying which species form flocks, the number and size of flocks, and the land-uses in which birds aggregate. During autumn and winter 2016, we conducted a series of surveys in which we recorded the occurrence of flocks in different habitats, including different types of land uses (croplands and pastures), road mar‐ gins, and native grasslands. We registered a total of 8165 individuals grouped in 180 flocks, of which 96% were monospecific and the remaining 4% were mixed-species flocks. Twenty-seven species formed monospecific flocks, whereas only four species were involved in mixed species flocks. Flock sizes ranged from 3 to c. 800 individuals. The highest values of richness and number of flocks were registered in grazing fields, standing maize crops, and maize and sunflower stubbles. Abundance of birds was highest in standing maize crops and maize stubbles, standing sorghum, and grazing fields, which encompassed 65% of total individuals. In addition, we detected flocks of granivorous, insectivorous, and omnivorous species, which associated with certain habitats and land-uses according their main type of food. The landscape heterogeneity in the study area would offer a variety of food resources for species with different trophic requirements, which tend to aggregate during the season when food naturally decreases. Our results evidence the necessity to promote a diversification of the land-use system in order to sustain the highest possible bird diversity in agroecosystems of the Pampas region. Fil: Pretelli, Matías Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Baladron Felix, Alejandro Victor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Cardoni, Daniel Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
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- 2018
15. Leukocyte profiles and body condition of free-living Burrowing owls (Athene cunicularia) from rural and urban areas
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Cavalli, Matilde, Baladron Felix, Alejandro Victor, Isacch, Juan Pablo, D'amico, Veronica Laura, and Bó, Maria Susana
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Ciencias Biológicas ,purl.org/becyt/ford/1 [https] ,LYMPHOCYTE ,STRESS ,Zoología, Ornitología, Entomología, Etología ,URBANIZATION ,purl.org/becyt/ford/1.6 [https] ,HETEROPHIL ,CIENCIAS NATURALES Y EXACTAS - Abstract
Species living in urban areas are exposed to novel and potentially stressful human perturbations. In response to the increasing number of stressors in these habitats, animals may manifest changes in their immune system, body condition and physiology. Many bird species are negatively impacted by urbanization, but other species survive and thrive in urban areas. The capacity to adjust the stress responses to the conditions of urban areas may play a key role to explain the success of bird species in this habitat. In this study, we compared indicators of stress and body condition in free-living Burrowing owls (Athene cunicularia) inhabiting urban and rural areas. We calculated a scaled index of body condition, assessed leukocyte profiles and calculated the heterophil/lymphocyte (H/L) ratios of chicks and adult Burrowing owl individuals. We found that the total white blood cell counts, the relative leukocyte count, and the H/L ratio were similar in owls from rural and urban areas, as well as their body condition. Chicks showed higher counts of white blood cells relative to adult owls, which may be associated with developmental stages and immune system activation processes. Here we provide the first Burrowing owl baseline data of leukocyte profile, one that can be used as a reference when developing future studies. Fil: Cavalli, Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Baladron Felix, Alejandro Victor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: D'amico, Veronica Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Bó, Maria Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
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- 2018
16. Multiple factors associated with nest-site selection in a wetland-specialist, the Wren-like Rushbird (Phleocryptes melanops)
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Chiaradia, Nicolás Mariano, primary, Isacch, Juan Pablo, additional, Pretelli, Matías Guillermo, additional, and Cardoni, Daniel Augusto, additional
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- 2019
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17. Tetrapod’s diversity at the southeast Pampas as a tool for conservation planning
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Isacch, Juan Pablo, Bó, Maria Susana, Vega, Laura Estela, Favero, Marco, Baladrón, Alejandro Victor, Pretelli, Matías Guillermo, Stellatelli, Oscar Aníbal, Cardoni, Daniel Augusto, Copello, Sofía, Block, Carolina, Cavalli, Matilde, Comparatore, Viviana Marta, Mariano y Jelicich, Rocío, Biondi, Laura Marina, García, Germán Oscar, and Seco Pon, Juan Pablo
- Subjects
purl.org/becyt/ford/1 [https] ,BIRDS ,REPTILES ,CONSERVATION ,MAMMALS ,AMPHIBIANS ,BIODIVERSITY ,purl.org/becyt/ford/1.6 [https] - Abstract
A pesar del avance en el conocimiento de la biodiversidad para ciertas regiones, éste se encuentra en general disperso y no ha sido interpretado respecto a sus propiedades emergentes ni puesto en contextos que faciliten la toma de decisiones en conservación. El sudeste de la ecorregión Pampeana presenta una diversidad ambiental destacada en un área relativamente restringida, y existe además una importante cantidad de información sobre diversidad de Tetrápodos. Nuestro objetivo fue compilar y analizar este cúmulo de información, a través de una lista de especies con sus abundancias relativas por ambientes destacando aquellas endémicas y de interés para la conservación. Evaluamos la complementariedad entre los taxones (anfibios, reptiles, aves y mamíferos) en términos de composición, número de especies totales y amenazadas. La diversidad de Tetrápodos recopilada pone de manifiesto que esta pequeña área presenta una riqueza de especies (12 especies de anfibios, 26 reptiles, 233 aves, 34 mamíferos; 41 están amenazadas y dos son endémicas) representativa de la provincia de Buenos Aires. Los ambientes representados (pastizales, dunas, sierras, humedales, estuarios, marino, agroecosistemas, urbanizaciones) contribuyen diferencialmente a la diversidad general de Tetrápodos. La distribución desproporcionada de la riqueza de especies, de especies amenazadas y de la composición entre ambientes dentro de cada grupo taxonómico, entre taxones y entre diferentes unidades ambientales destacan la utilidad de este tipo de análisis en la interpretación de la variación espacial de la biodiversidad y deberían contribuir en la planificación territorial en un marco que optimice la conservación. Despite advances in the understanding about the biodiversity in some regions, this is in general rather dispersed and has not been analyzed regarding their emergent properties and ordered in contexts to facilitate decision-making. The southeast of the Pampas shows an outstanding environmental diversity in a relatively restricted area, with a significant amount of information about biodiversity of Tetrapods. Our goal was to gather this information within a common framework, making a list of the relative abundance of species at each environment, highlighting species of conservation concern. We evaluated the complementarity among taxa (amphibians, reptiles, birds and mammals) in terms of composition, total number of species and number of threatened species. Our results on Tetrapods´ diversity data shows that this small area harbor a number of species representative of Buenos Aires Province, 12 species of amphibians, 26 reptiles, 233 birds and 34 species of mammals, of which 41 are threatened and two endemic. The environments represented (grassland, dunes, mountains, wetlands, estuaries, marine, agroecosystems and urbanizations) contribute differently to the overall diversity of Tetrapods. The uneven distribution of species richness, threatened species and composition within each taxon among environments and among taxa highlights the usefulness of this type of analysis in the elucidation of the spatial variation of biodiversity and it should assists in territorial planning within a framework that optimizes the conservation of biodiversity. Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Bó, Maria Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Vega, Laura Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Baladrón, Alejandro Victor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Pretelli, Matías Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Stellatelli, Oscar Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Cardoni, Daniel Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Copello, Sofía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Block, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Cavalli, Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Comparatore, Viviana Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Mariano y Jelicich, Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Biondi, Laura Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: García, Germán Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
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- 2016
18. BANDADAS OTOÑO–INVERNALES EN AGROECOSISTEMAS DEL SUDESTE DE LA REGIÓN PAMPEANA, ARGENTINA
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Pretelli, Matias Guillermo, primary, Baladrón, Alejandro Victor, additional, Cardoni, Daniel Augusto, additional, and Isacch, Juan Pablo, additional
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- 2018
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19. Migration Routes and Stopover Sites of Upland Geese Chloephaga Picta in South America
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Pedrana, Julieta, primary, Pütz, Klemens, additional, Bernad, Lucía, additional, Pon, Juan Pablo Seco, additional, Gorosabel, Antonella, additional, Muñoz, Sebastián D., additional, Isacch, Juan Pablo, additional, Matus, Ricardo, additional, Blank, Olivia, additional, Lüthi, Benno, additional, Lunardelli, Melina, additional, and Rojas, Pablo, additional
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- 2018
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20. Species-Area Relationships of Specialist Versus Opportunistic Pampas Grassland Birds Depend on the Surrounding Landscape Matrix
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Pretelli, Matías Guillermo, primary, Isacch, Juan Pablo, additional, and Cardoni, Daniel Augusto, additional
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- 2018
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21. Niche Overlap Determination Through Habitat Suitability Models: A Management Tool for Native Birds of the Argentinean Pampas
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Pedrana, Julieta, primary, Bernad, Lucía, additional, Maceira, Néstor Oscar, additional, and Isacch, Juan Pablo, additional
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- 2018
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22. Habitat suitability models for the sand lizard Liolaemus wiegmannii based on landscape characteristics in temperate coastal dunes in Argentina
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Block, Carolina, Pedrana, Julieta, Stellatelli, Oscar Aníbal, Vega, Laura Estela, and Isacch, Juan Pablo
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Ciencias Biológicas ,LANDSCAPE METRICS ,SUITABLE HABITATS ,Otras Ciencias Biológicas ,SAND LIZARD ,GIS ,PAMPAS COASTAL DUNES ,CIENCIAS NATURALES Y EXACTAS - Abstract
The knowledge of environmental variables associated with the species occurrence allows the recognition of sites which fulfil ecological requirements eventually used for conservation of species. The coastal dunes of Argentina are inhabited by sand lizards. Anthropic activities have severely degraded this ecosystem, affecting the habitat structure at a large scale. In this context, the effects of landscape characteristics on the sand lizard's (Liolaemus wiegmannii, Liolaemidae) presence were analysed to build habitat suitability maps along the coastal dunes of Argentina. A thematic map of study area was obtained from supervised classification of satellite images to identify landscape characteristics. Surveys were conducted during the lizard activity season, and landscape variables were measured in two spatial units. All information collected was compiled into a Geographic Information System. The relationship between the presence of lizards and landscape variables was evaluated by Generalized Linear Models. The predictions of these models were transferred by using Geographic Information System to habitat suitability maps. Almost all individuals (80%) were observed in semi-fixed dunes. The analysis of landscape metrics in the two spatial extents showed complementary results. The habitat suitability models suggest that: (i) heterogeneous landscapes composed by disaggregated patches of semi-fixed dunes and low or null percentages of active dunes distant from the coastline are the preferred environments, and (ii) human modifications such as urbanizations and forestation of dunes, have a negative impact on species occurrence. Suitable habitats were almost absent in those sectors of coastal dunes with highest level of urbanization, whereas they were distributed almost continuously in those areas without human disturbances. Fil: Block, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Pedrana, Julieta. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Stellatelli, Oscar Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Vega, Laura Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
- Published
- 2016
23. Factors affecting the spatial ecology of the lizard Liolaemus wiegmannii in the pampasic coastal dunes of Argentina
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Stellatelli, Oscar Aníbal, Block, Carolina, Vega, Laura Estela, Isacch, Juan Pablo, and Cruz, Felix Benjamin
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Ciencias Biológicas ,Liolaemus ,radio-telemetry ,Otras Ciencias Biológicas ,home range ,sand-lizard ,CIENCIAS NATURALES Y EXACTAS - Abstract
Home ranges of lizards are the result of both internal (body condition, reproductive status) and external factors, such as habitat features and resource availability. Habitat modification induced by introduced plants affects habitat use for lizards by changing food abundance, environmental temperatures or by homogenizing the habitat structure. We compared the home range of the lizard Liolaemus wiegmannii in two situations: a partially forested habitat (20% of the total surface covered by Acacia longifolia) and a non-forested habitat. Twelve adult lizards were radio-tracked in the forested habitat and ten in the non-forested site. Home ranges were calculated using the minimum convex polygon method. The mean home range size was 37.80±17.95 m2 and was not different between both habitat types. Males home ranges were 1.6 times larger than those of females. Abundance of food was highest in the forested habitat, nonetheless, its effect on home range size was not evident. Home range in L. wiegmannii showed a marked association with mixed patches of native grassland, bare sand substrates and scarce coverage of exotic trees. Our data suggest that movements in L. wiegmannii may be mainly related to structural features (and their associated thermal cues) of specific microhabitats types. Although low levels of forestation with A. longifolia have less effect on the home range size and movements of lizards, we cannot ignore previous results showing that occurrence, abundance, and body condition of L. wiegmannii are negatively affected by extensive forestation of exotic plants both at local and landscape scales in pampasic dunes. Fil: Stellatelli, Oscar Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Block, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Vega, Laura Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Cruz, Felix Benjamin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
- Published
- 2016
24. Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014)
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Martínez Curci, Natalia Soledad, Bremer, Esteban, Azpiroz, Adrián B., Battaglia, Gabriel E., Salerno, Javier C., Isacch, Juan Pablo, González, Patricia M., Castresana, Gabriel J., and Rojas, Pablo
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Ciencias Biológicas ,PUNTA RASA ,Otras Ciencias Biológicas ,SOUTH AMERICA ,CALIDRIS CANUTUS RUFA ,OVER-SUMMERING ,CIENCIAS NATURALES Y EXACTAS ,RED KNOT - Abstract
From 1985 to 2014, we monitored numbers of Red Knots Calidris canutus of the subspecies rufa occurring at Punta Rasa, Samborombón Bay, Buenos Aires province, Argentina during northward migration (March to April), and in the austral winter (mid-May to mid-August), when some knots, mainly immatures, remain in South America during the breeding season. Numbers occurring during northward migration declined over the monitoring period from a peak of 3,640 in 1987 to 168 in 2014. This is consistent with the concurrent decline of the main Tierra del Fuego wintering population (though the percentage of the Tierra del Fuego population stopping at Punta Rasa also declined from 5.4% to 1.3%). Numbers occurring at Punta Rasa during the austral winter have also declined, but not to the same extent and for the past decade more have been counted during the austral winter than during northward migration. Among those seen at Punta Rasa during the Arctic breeding season have been some with large amounts of rufous breeding plumage. The percentage of such birds has increased from 10–15% in 1987 to 19–54% during 2011–2014. Moreover, observations of individually marked birds show that some of those showing breeding plumage are mature adults, at least 3–7 years old. Conservation actions are required to manage Punta Rasa for the small but important numbers of Red Knots that occur there. Further research is needed to determine why some mature adults do not go to their Arctic breeding grounds and thereby fail to contribute to reproduction. Fil: Martínez Curci, Natalia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Bremer, Esteban. Fundación Vida Silvestre Argentina; Argentina Fil: Azpiroz, Adrián B.. Instituto de Investigaciones Biológicas "Clemente Estable"; Uruguay Fil: Battaglia, Gabriel E.. Municipalidad del partido de La Costa; Argentina Fil: Salerno, Javier C.. Municipalidad del partido de La Costa; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: González, Patricia M.. Fundación Inalafquen; Argentina Fil: Castresana, Gabriel J.. Reserva Natural Bahía Samborombón; Argentina Fil: Rojas, Pablo. Reserva Natural Bahía Samborombón; Argentina
- Published
- 2015
25. Causes and Consequences of Nest Mass and Structure Variation in the Bay-Capped Wren-Spinetail Spartonoica maluroides
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Cardoni, Daniel Augusto, primary, Isacch, Juan Pablo, additional, and Baladrón, Alejandro, additional
- Published
- 2017
- Full Text
- View/download PDF
26. BIOLOGÍA REPRODUCTIVA Y ESTATUS DE OCURRENCIA DEL DORADITO COMÚN (PSEUDOCOLOPTERYX FLAVIVENTRIS) NIDIFICANDO EN PASTIZALES AL SUR DE SU DISTRIBUCIÓN
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Cardoni, Augusto, primary, Pretelli, Matias Guillermo, additional, Isacch, Juan Pablo, additional, Baladron, Alejandro Victor, additional, and Chiaradia, Nicolas Mariano, additional
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- 2017
- Full Text
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27. Differing nest-defence behaviour in urban and rural populations of breeding Burrowing Owls
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Cavalli, Matilde, primary, Isacch, Juan Pablo, additional, Baladrón, Alejandro V., additional, Biondi, Laura M., additional, and Bó, María Susana, additional
- Published
- 2016
- Full Text
- View/download PDF
28. Habitat suitability models for the sand lizard Liolaemus wiegmannii based on landscape characteristics in temperate coastal dunes in Argentina
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Block, Carolina, primary, Pedrana, Julieta, additional, Stellatelli, Oscar Aníbal, additional, Vega, Laura Estela, additional, and Isacch, Juan Pablo, additional
- Published
- 2016
- Full Text
- View/download PDF
29. Scale dependency ofLiolaemuslizards’ home range in response to different environmental variables
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Stellatelli, Oscar Aníbal, primary, Block, Carolina, additional, Moreno-Azócar, Débora Lina, additional, Vega, Laura Estela, additional, Isacch, Juan Pablo, additional, and Cruz, Félix Benjamín, additional
- Published
- 2016
- Full Text
- View/download PDF
30. Differential risk perception of rural and urban Burrowing Owls exposed to humans and dogs
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Cavalli, Matilde, primary, Baladrón, Alejandro V., additional, Isacch, Juan Pablo, additional, Biondi, Laura M., additional, and Bó, María Susana, additional
- Published
- 2016
- Full Text
- View/download PDF
31. FIRST INSIGHTS INTO THE MIGRATION PATTERN OF AN UPLAND GOOSE (CHLOEPHAGA PICTA) BASED ON SATELLITE TRACKING
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Pedrana, Julieta, primary, Seco Pon, Juan Pablo, additional, Isacch, Juan Pablo, additional, Leiss, Alejandro, additional, Rojas, Pablo, additional, Castresana, Gabriel, additional, Calvo, Jose, additional, Bernad, Lucia, additional, Muñoz, Sebastian, additional, Maceira, Nestor, additional, and Pütz, Klemens, additional
- Published
- 2016
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- View/download PDF
32. Morphological adaptation to coastal marshes in spite of limited genetic structure in the Neotropical passerine Spartonoica maluroides (Aves: Furnariidae)
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Cardoni, Daniel Augusto, Greenberg, Russell, Maldonado, Jesús E., and Isacch, Juan Pablo
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Ciencias Biológicas ,CONVERGENT EVOLUTION ,GENETIC ,PHENOTYPIC PLASTICITY ,MORPHOLOGY ,SALTMARSH ,BAY-CAPPED WREN-SPINETAIL ,MELANISM ,Bioquímica y Biología Molecular ,CIENCIAS NATURALES Y EXACTAS - Abstract
Tidal marshes present profound adaptive challenges to terrestrial vertebrates. For example, North American sparrows have relatively longer and thinner bills and darker dorsal plumage in coastal saltmarshes than in interior marshes. Bay-capped wren-spinetail (Furnariidae; Spartonoica maluroides) show a strong association with South American saltmarshes. We hypothesized that bay-capped wren-spinetail have similar morphological adaptations to North American sparrows to the saltmarsh environment, which would be indicative of the generality of selection on these traits in the coastal saltmarsh ecosystem. We captured individuals of S. maluroides from coastal saltmarshes and interior marshes. Populations were compared based on morphology and molecular markers. We found significant phenotypic differences in bill shape and plumage coloration (melanism) between S. maluroides populations from coastal and inland marshes. The low levels of genetic variation, weak geographical structure and shallow divergences, based on mitochondrial DNA and microsatellite data, suggest that coastal populations had a recent demographic expansion. Our results are consistent with the pattern of morphological divergence found between North American Emberizids. The possibility of convergent evolutionary adaptations between saltmarsh North American Emberizids and South American Furnariids suggests that there are strong selective pressures associated with saltmarsh environments on the beak, leading to adaptations for food acquisition, and on plumage coloration for better camouflage for predator avoidance (melanism). Fil: Cardoni, Daniel Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Greenberg, Russell. Smithsonian National Zoological Park. Washington; Estados Unidos Fil: Maldonado, Jesús E.. Smithsonian Conservation Biology Institut. Washington; Estados Unidos. National Museum of Natural History; Estados Unidos Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
- Published
- 2013
33. Avian responses to varying intensity of cattle production in Spartina densiflora saltmarshes of south-eastern South America
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Cardoni, Daniel Augusto, primary, Isacch, Juan Pablo, additional, and Iribarne, Oscar, additional
- Published
- 2015
- Full Text
- View/download PDF
34. Waterbird Response to Changes in Habitat Area and Diversity Generated by Rainfall in a SW Atlantic Coastal Lagoon
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Canepuccia, Alejandro Daniel, Isacch, Juan Pablo, Gagliardini, Domingo Antonio, Escalante, Alicia Haydee, and Iribarne, Oscar Osvaldo
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Ciencias Biológicas ,habitat diversity ,marsh ,remote sensing ,flooding ,waterbirds ,water depth ,Argentina ,shorebirds ,Ecología ,rainfal ,CIENCIAS NATURALES Y EXACTAS - Abstract
The rainfall regime of the Pampas region of Argentina shows a long-term cyclic behavior that has increased in intensity over the historical mean during the last four decades. In this paper we explored the effects of changes in monthly cumulative rainfall on lagoon and riparian habitat, and, in turn on the wetland waterbird community. We also explored the responses of waterbird morphofunctional groups to fluctuation in water level and habitat diversity caused by the change in rainfall at the Mar Chiquita Coastal Lagoon, Argentina (37°32’ to 37°45’S, 57°19’ to 57°26’W). Analysis of satellite images shows that increases in rainfall increased wetland water surface, but reduced riparian habitat area and habitat diversity. Increases in water surface negatively affected the abundances and species richness of waterbirds; habitat diversity did not explain a significant portion of total waterbird variability. Shorebirds (i.e., yellowlegs, plover, sandpiper) were the most affected by reduction in mudflats and habitat diversity. Other waterbirds (i.e., long-legged wading birds, waterfowls) were affected by increases in water surface (ducks, swans, long-legged waterbirds and gulls), decrease in mudflat availability (long-legged waterbirds and gulls), and decrease in habitat diversity (ducks). Our results show that the inter-annual variability in the rainfall pattern influenced the presence and abundance of most waterbirds, and species richness and composition. Fluctuation in water depth per se is known to be a key factor for habitat use of many waterbirds, but habitat diversity also needs to be considered.per se is known to be a key factor for habitat use of many waterbirds, but habitat diversity also needs to be considered. Fil: Canepuccia, Alejandro Daniel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina Fil: Gagliardini, Domingo Antonio. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Escalante, Alicia Haydee. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Iribarne, Oscar Osvaldo. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
- Published
- 2007
35. Uso de arroceras por chorlos y playeros migratorios (Blanco et al.: Uso de arroceras por chorlos y playeros migratorios en el sur de América del Sur. Implicancias de conservación y manejo)
- Author
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Isacch, Juan Pablo
- Published
- 2007
36. Scale dependency of Liolaemus lizards' home range in response to different environmental variables.
- Author
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STELLATELLI, Oscar Anıbal, BLOCK, Carolina, MORENO-AZÓCAR, Débora Lina, VEGA, Laura Estela, ISACCH, Juan Pablo, and CRUZ, Félix Benjamın
- Subjects
LIOLAEMUS ,HABITATS ,HOME range (Animal geography) ,GRASSLANDS ,PHYLOGENY - Abstract
Animal habitat-use patterns cannot be isolated from scale issues. Consequently, multi-scale studies provide a complete characterization of ecological patterns that can further explain the observed variation. Liolaemus constitutes the world's second most speciose lizard genus. In this study, we assessed the relationships between home range size and environmental variables at 3 different spatial scales. The study at a local and regional scale was focused on the habitat specialist Liolaemus multimaculatus. The lizard's home range was calculated using the minimum convex polygon method in populations from grassland sites of the coastal sand dunes of the Argentinean Pampas under 2 different conditions, with or without forestations of Acacia longifolia. On the other hand, at a geographical scale we considered the evolutionary implications of 20 species of Liolaemus. Home range size, phylogeny, ecological, environmental, and climatic data were obtained from the literature and remote sensing. L. multimaculatus home range varied from 12.66 to 570.00 m. Regionally, this species had smaller home ranges in forested habitats (X: 94.02m2) compared with the non-forested sites (X: 219.78m2). Habitat structure, vegetation types, and food availability would explain the space use at finer scales. When the 20 species of Liolaemus were considered, high mean air temperature and broad thermal amplitudes showed an inverse relationship with home range size. Neither net primary productivity nor phylogeny was good predictors for home range variation at geographical scale. This study highlights the scale dependence of the explicative capability of a set of environmental and intrinsic variables on home range patterns. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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37. The distribution and ecological effects of the introduced Pacific oyster Crassostrea gigas (Thunberg, 1793) in Northern Patagonia
- Author
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Escapa, Carlos Mauricio, Isacch, Juan Pablo, Daleo, Pedro, Alberti, Juan, Iribarne, Oscar Osvaldo, Borges, Mónica Elisa, Dos Santos, Eder Paulo, Gagliardini, Domingo Antonio, and Lasta, Mario
- Subjects
purl.org/becyt/ford/1 [https] ,BIOLOGIC INVASIONS ,Ciencias Biológicas ,CRASSOSTREA GIGAS ,ECOSYSTEM ENGINEERS ,Otras Ciencias Biológicas ,purl.org/becyt/ford/1.6 [https] ,MIGRATORY SHOREBIRDS ,CIENCIAS NATURALES Y EXACTAS - Abstract
In this work we studied the actual coverage, distribution patterns and ecologic effects of the introduced oyster Crassostrea gigas 20 y after their introduction to the Northern Argentinean Patagonia (Bahia Anegada; 39º50´S to 40º40´S and 61º59 to 62º28 W). Using satellite imagery and field and aerial inspections we found 10 oyster beds that cover less than 0.05% of the bay intertidal (area covered: 36.45 ha). These beds are restricted to intertidal zones with superficial hard substrata (limestone outcrops). Most epifaunal organisms (the crabs Cyrtagrapsus angulatus, Chasmagnathus granulatus, the isopod Melita palmata. and the snail Heleobia australis) showed higher densities inside oyster beds compared with outside and experiments showed that artificially deployed oyster beds increased the densities of their at three intertidal zones (high intertidal marsh, low intertidal marsh. and low intertidal with hard substrata) and also increased densities of infaunal organisms (the polychaetes Laeonereis acuta, Nepthys fluviatilis, and the priapulid Priapulus tuberculatospinosus) at the low intertidal with hard substrata. This may be the result of increasing habitat structure and refuge for epifaunal organisms, and enhancement of deposition and sediment stability that may benefit infaunal organisms. Densities bird species (Local species: Larus dominicanus, Haematopus palliatits: Regional migratory shorebird: Charadrius falklandicus; Long range migratory shorebirds: Pluvialis dominica, Calidris canutus, Tringa flavipes) were higher inside oyster beds compared with similar zones without oysters, which may be the result of higher prey availability. Foraging rate was also higher for some of these species (P. dominica, C. falklandicus). However, due to the limited availability of hard substratum the distribution of oysters is small. In conclusion, no negative effects were observed as a result of this introduction. There was an increase in species abundance and the area was preferred by local and migratory bird species, which also showed higher feeding rates. Fil: Escapa, Carlos Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional de Mar del Plata; Argentina Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; Argentina Fil: Daleo, Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; Argentina Fil: Alberti, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; Argentina Fil: Iribarne, Oscar Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata; Argentina Fil: Borges, Mónica Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina Fil: Dos Santos, Eder Paulo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina Fil: Gagliardini, Domingo Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Lasta, Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentina
- Published
- 2004
38. Year-Round Abundance, Richness and Nesting of the Bird Assemblage of Tall Grasslands in the South-East Pampas Region, Argentina
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Pretelli, Matías Guillermo, primary, Isacch, Juan Pablo, additional, and Cardoni, Daniel Augusto, additional
- Published
- 2013
- Full Text
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39. Revisión de libros: Chorlos y playeros neotropicales (Canevari et al.: Guía de chorlos y playeros de la Región Neotropical)
- Author
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Isacch, Juan Pablo
- Published
- 2002
40. Obituario: Mariano Manuel Martínez (1956-1998)
- Author
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Bó, María Susana and Isacch, Juan Pablo
- Published
- 2001
41. Diversity and Habitat Distribution of Birds in Coastal Marshes and Comparisons with Surrounding Upland Habitats in Southeastern South America
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Isacch, Juan Pablo, primary, Cardoni, Daniel Augusto, additional, and Iribarne, Oscar Osvaldo, additional
- Published
- 2013
- Full Text
- View/download PDF
42. Habitat and abundance of Speckled Crake (Coturnicops notata) and Dot-winged Crake (Porzana spiloptera) in Mar Chiquita, Buenos Aires Province, Argentina
- Author
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Matinez, Mariano Manuel, Bó, María Susana, and Isacch, Juan Pablo
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Reserva ,abundance ,Mar Chiquita Reserve (Buenos Aires Province) ,Coturnicops notata ,Porzana spiloptera ,conservation ,habitat ,abundancia ,conservación ,Mar Chiquita (Provincia de Buenos Aires) ,hábitat - Abstract
We provide new records, data on habitat and abundance of the Speckled Crake (Coturnicops notata) and Dot-winged Crake (Porzana spiloptera), and measurements and stomach contents of one C. notata. The study area was Mar Chiquita Reserve, Buenos Aires Province. Records were gathered as follows: between 1983-84, 1992-97 during monthly censuses at different habitats (but mainly on grassland), and in 1995-96 during 1000 m transects in grasslands of Spartina densiflora and Juncus acutus (c1imax state and postfire succession). The Speckled Crake was recorded in four opportunities, on three different habitats: grasslands of S. densiflora, J. acutus and a patch of Scirpus americanus. The Dot-winged Crake was recorded in 26 opportunities (41 individuals), two on J. acutus grassland and the rest on mature grassland of S. densiflora. The Speckled Crake has a wider distribution, it's apparently more plastic in habitat requirements but rarer; the Dot-winged Crake has a narrower distribution, it's habitat specific (occurs mostly with S. densiflora), and locally more frequent (but uncommon).
- Published
- 1997
43. Observations on pelagic seabirds at SE Buenos Aires, Argentina
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Isacch, Juan Pablo and Chiurla, Enrique H.
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Buenos Aires ,Oceanic birds ,Aves pelágicas ,registros costeros ,coastal records - Abstract
From 1991 to 1995 11 species of oceanic birds were registered at two sites in SE Buenos Aires Province, Argentina, by means of regular observations from the shore. Nine species corresponded to the order Procellariiformes and 2 species to the family Stercorariidae.
- Published
- 1997
44. Ecology and conservation of grassland birds in southeastern South America: a review
- Author
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Azpiroz, Adrián B., primary, Isacch, Juan Pablo, additional, Dias, Rafael A., additional, Di Giacomo, Adrián S., additional, Fontana, Carla Suertegaray, additional, and Palarea, Cristina Morales, additional
- Published
- 2012
- Full Text
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45. Scale dependency of Liolaemuslizards' home range in response to different environmental variables.
- Author
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Stellatelli, Oscar Aníbal, Block, Carolina, Moreno-Azócar, Débora Lina, Vega, Laura Estela, Isacch, Juan Pablo, and Cruz, Félix Benjamín
- Abstract
Animal habitat-use patterns cannot be isolated from scale issues. Consequently, multi-scale studies provide a complete characterization of ecological patterns that can further explain the observed variation. Liolaemusconstitutes the world's second most speciose lizard genus. In this study, we assessed the relationships between home range size and environmental variables at 3 different spatial scales. The study at a local and regional scale was focused on the habitat specialist Liolaemus multimaculatus. The lizard's home range was calculated using the minimum convex polygon method in populations from grassland sites of the coastal sand dunes of the Argentinean Pampas under 2 different conditions, with or without forestations of Acacia longifolia. On the other hand, at a geographical scale we considered the evolutionary implications of 20 species of Liolaemus.Home range size, phylogeny, ecological, environmental, and climatic data were obtained from the literature and remote sensing. L. multimaculatushome range varied from 12.66 to 570.00 m. Regionally, this species had smaller home ranges in forested habitats ([Formula: see text]: 94.02 m2) compared with the non-forested sites ([Formula: see text]: 219.78 m2). Habitat structure, vegetation types, and food availability would explain the space use at finer scales. When the 20 species of Liolaemuswere considered, high mean air temperature and broad thermal amplitudes showed an inverse relationship with home range size. Neither net primary productivity nor phylogeny was good predictors for home range variation at geographical scale. This study highlights the scale dependence of the explicative capability of a set of environmental and intrinsic variables on home range patterns.
- Published
- 2016
- Full Text
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46. Foraging behaviour and diet of American Oystercatchers in a Patagonian intertidal area affected by nutrient loading
- Author
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García, Germán Oscar, primary, Isacch, Juan Pablo, additional, Laich, Agustina Gómez, additional, Albano, Mariano, additional, Favero, Marco, additional, Cardoni, Daniel Augusto, additional, Luppi, Tomás, additional, and Iribarne, Oscar, additional
- Published
- 2010
- Full Text
- View/download PDF
47. Habitat relationships of diurnal raptors at local and landscape scales in southern temperate grasslands of Argentina
- Author
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Pedrana, Julieta, primary, Isacch, Juan Pablo, additional, and Bó, María Susana, additional
- Published
- 2008
- Full Text
- View/download PDF
48. Changes in rainfall pattern affect crab herbivory rates in a SW Atlantic salt marsh
- Author
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Alberti, Juan, primary, Montemayor, Diana, additional, Álvarez, Fernanda, additional, Méndez Casariego, Agustina, additional, Luppi, Tomás, additional, Canepuccia, Alejandro, additional, Isacch, Juan Pablo, additional, and Iribarne, Oscar, additional
- Published
- 2007
- Full Text
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49. Uso de arroceras por chorlos y playeros migratorios
- Author
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Isacch, Juan Pablo, primary
- Published
- 2007
- Full Text
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50. Trophic facilitation by the oystercatcher Haematopus palliatus Temminick on the scavenger snail Buccinanops globulosum Kiener in a Patagonian bay
- Author
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Daleo, Pedro, primary, Escapa, Mauricio, additional, Isacch, Juan Pablo, additional, Ribeiro, Pablo, additional, and Iribarne, Oscar, additional
- Published
- 2005
- Full Text
- View/download PDF
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