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Artículo

Feeding habits of the Rio skate, Rioraja agassizi (Chondrichthyes: Rajidae), from off Uruguay and north Argentina

Barbini, Santiago AldoIcon ; Lucifora, Luis OmarIcon
Fecha de publicación: 10/2010
Editorial: Cambridge University Press
Revista: Journal of the Marine Biological Association of the United Kingdom
ISSN: 0025-3154
e-ISSN: 0025-3154
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The feeding habits of the Rio skate, Rioraja agassizi, from off Uruguay and north Argentina were evaluated using a multiple-hypothesis modeling approach. Relationships between number of preys and sex, maturity stage, body size, season and region were assessed by building generalized linear models. R. agassizi fed mainly upon crustaceans (shrimps, crabs and amphipods) and teleosts, but also upon isopods, cumaceans, lancelets and polychaetes. Ontogenetic diet shifts were found: small R. agassizi consumed amphipods, cumaceans and isopods and large individuals on shrimps, crabs and teleosts. The consumption of crustaceans (amphipods, shrimps, crabs, isopods and cumaceans) was higher in the north (34° - 38°S) than in the south area (38° - 41°S). R. agassizi consumed more teleosts in the cold season and preyed more on lancelets in the warm season. Prey size increased with increasing body size of R. agassizi, but large individuals also consumed small prey. Ontogenetic shifts may be related to body size rather than other life-history traits. R. agassizi adapts its feeding habits in response to regional and seasonal changes.
Palabras clave: Skates , Feeding Ecology , Diet Shifts , Southwest Atlantic
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/43184
DOI: http://dx.doi.org/10.1017/S0025315410001529
URL: https://www.cambridge.org/core/journals/journal-of-the-marine-biological-associa
Colecciones
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Articulos(CCT - NORDESTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NORDESTE
Citación
Barbini, Santiago Aldo; Lucifora, Luis Omar; Feeding habits of the Rio skate, Rioraja agassizi (Chondrichthyes: Rajidae), from off Uruguay and north Argentina; Cambridge University Press; Journal of the Marine Biological Association of the United Kingdom; 91; 6; 10-2010; 1175-1184
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