Articulos de CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS http://hdl.handle.net/11336/14306 2024-04-06T21:25:24Z 2024-04-06T21:25:24Z Merlo, Pablo Javier Venerus, Leonardo Ariel Irigoyen, Alejo Joaquin http://hdl.handle.net/11336/232123 2024-04-05T13:33:52Z 2023-02-01T00:00:00Z

Fine-scale variation in the proximity of baited remote underwater video stations (BRUVS) to rocky reefs reveals changes in the structure of temperate fish assemblages Merlo, Pablo Javier; Venerus, Leonardo Ariel; Irigoyen, Alejo Joaquin We investigated changes in the structure of coastal fish assemblages in Northern Patagonia, Southwestern Atlantic, by using baited remote underwater video stations (BRUVS) deployed at increasing distances from rocky reefs: 0–5 m, 15–20 m and 50–60 m. We estimated species richness and abundance (total and by preferred habitat type) and searched for diagnostic species in each distance range. We recorded 14 taxa across 11 families in 19 areas surveyed. Species richness and abundance were higher on reef ledges and decreased with distance from them, at a finer spatial scale than previously reported. Acanthistius patachonicus and Sebastes oculatus were indicative of reef ledges; they were less abundant at 15–20 m and disappeared at 50–60 m. Callorinchus callorynchus and Odontesthes spp. occurred only at distances >15–20 m from the reefs, while Galeorhinus galeus was distributed homogeneously throughout the surveyed area. Our findings have practical implications for monitoring ecotone demersal habitats with BRUVS.

2023-02-01T00:00:00Z D'amico, Veronica Laura Hevia, Glenda Denise Bertellotti, Néstor Marcelo http://hdl.handle.net/11336/231306 2024-03-22T12:50:35Z 2016-12-01T00:00:00Z

Blood parameters of migratory shorebirds at Peninsula Valdes, Patagonia D'amico, Veronica Laura; Hevia, Glenda Denise; Bertellotti, Néstor Marcelo We present blood parameters related to body condition and immune function of three shorebird species Calidris canutus rufa, Calidris fuscicollis and Charadrius falklandicus at a feeding site in Peninsula Valdés, Patagonia, Argentina, during their non-breeding season. We determined concentrations of glucose, cholesterol, and triglycerides, the leukocyte profile and the heterophil/lymphocyte ratio. These data constitute the first report of these blood parameters in shorebirds at this location. These data provide baseline information for ecological studies on these species in this area. The data could also be used in larger meta-analyses comparing blood parameters across geographical areas, different species and over time.

2016-12-01T00:00:00Z Irigoyen, Alejo Joaquin Trobbiani, Gastón Andres de Wysiecki, Agustín María Aguilera, Gaston Teran, Guillermo Enrique Bugeau, Horacio Baltazar Casalinuovo, Miguel Angel Alonso, Felipe http://hdl.handle.net/11336/230191 2024-03-12T13:43:39Z 2023-11-01T00:00:00Z

Efecto del Parque Nacional El Rey y de una crecida sobre peces de interés pesquero en un río subandino del noroeste de la Argentina; Effect of El Rey National Park and a flood on fish populations targeted by fishing on a subAndean River in northwest Argentina Irigoyen, Alejo Joaquin; Trobbiani, Gastón Andres; de Wysiecki, Agustín María; Aguilera, Gaston; Teran, Guillermo Enrique; Bugeau, Horacio Baltazar; Casalinuovo, Miguel Angel; Alonso, Felipe Ante la crisis global de pérdida de biodiversidad y deterioro de los ecosistemas, las áreas naturales protegidas tienen un rol preponderante como herramienta de manejo. Sin embargo, la mayoría se basa sobre criterios terrestres, mientras que los organismos de agua dulce son los más amenazados en cuanto a su conservación. En este trabajo se analiza el efecto de protección del Parque Nacional El Rey y de una crecida estival del río Popayán, de la cuenca del río Bermejito, sobre las poblaciones de peces de interés pesquero (el dorado [Salminus brasiliensis], el sábalo [Prochilodus lineatus] y la boga [Megaleporinus spp.]). Se realizaron estimaciones de abundancia y de talla mediante censos visuales antes y después al evento de crecida, y también dentro y en los límites del área protegida, en un contexto de presión de pesca por parte de pescadores furtivos. No se registró un efecto significativo de la crecida sobre las especies en estudio, pero sí del efecto del área protegida: en su interior se registró que las tres especies eran muy abundantes y que el dorado poseía tallas mucho mayores. Los resultados muestran que el área protegida cumple un rol esencial como sostén de las especies en estudio, sobre todo en el caso del dorado.; Faced with the global crisis of loss of biodiversity and deterioration of ecosystems, protected natural areas have a preponderant role as a management tool. However, most of these are based on terrestrial criteria, while freshwater organisms are the most threatened and vulnerable in terms of their conservation. This paper analyzes the protective effect of El Rey National Park and a summer flood on conspicuous fish (dorado [Salminus brasiliensis], sábalo [Prochilodus lineatus] and boga [Megaleporinus spp.]) in the Popayán River, Bermejo River basin. Abundance and size estimates were made through visual censuses before and after the flood event, as well as within and on the limits of the protected area in the context of fishing pressure from poachers. We found no significant effect of the flood on the species under study, but a significant effect of the protected area: inside it, all three species were found to be very abundant, with the dorado reaching much larger sizes. The results shows that the protected area plays an essential role in supporting the studied species, especially in the case of the dorado.

2023-11-01T00:00:00Z Fuentes, Sabrina Natalia Díaz Andrade, María Constanza Awruch, Cynthia Andrea Moya, Ana Carolina Arias, Andres Hugo http://hdl.handle.net/11336/229244 2024-03-04T15:31:07Z 2023-03-02T00:00:00Z

Impacts of water pollutants on chondrichthyans species from South America: A review Fuentes, Sabrina Natalia; Díaz Andrade, María Constanza; Awruch, Cynthia Andrea; Moya, Ana Carolina; Arias, Andres Hugo This is the first research which extensively compiles all the available scientific literature on the presence of trace metals (TMs), persistent organic pollutants (POPs), and plastic debris in Chondrichthyan species inhabiting South America (including the Atlantic and Pacific Oceans), providing an insight into Chondrichthyans as bioindicators of pollutants as well as the impacts of pollutant exposure on the organisms. Seventy-three studies were published in South America between 1986 and 2022. While 68.5% focused on TMs, 17.8% on POPs, and 9.6% on plastic debris. Brazil and Argentina were at the top in terms of the number of publications; however, there is an absence of information regarding pollutants for Chondrichthyans in Venezuela, Guyana, and French Guiana. Of the 65 Chondrichthyan species reported, 98.5% belong to the Elasmobranch group, and 1.5% from the Holocephalans. Most studies focused on Chondrichthyans of economic importance, and the most analyzed organs were the muscle and liver. There is a lack of studies on Chondrichthyan species with low economic value and critical conservation status. Due to their ecological relevance, distribution, accessibility, high trophic position, capacity to accumulate high levels of pollutants, and the number of studies published, Prionace glauca and Mustelus schmitii seem to be adequate to serve as bioindicators. For TMs, POPs, and plastic debris there is a lack of studies focusing on the pollutant levels as well as their effect on Chondrichthyans. Future research reporting TMs, POPs, and plastic debris occurrence in Chondrichthyan species are required in order to increase the scarce databases about pollutants in this group, with a clear need for further research on the responses of chondrichthyans to pollutants, as well as making inferences about the potential risks to the ecosystems and human health.

2023-03-02T00:00:00Z