Data/hora: 01/06/2024 03:15:44

Provedor de dados: | 83
País: | Brazil
Título: | Diet composition and feeding habits of the eyespot skate, Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae), off Uruguay and northern Argentina
Autores: | Barbini,Santiago A.; Lucifora,Luis O.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Chondrichthyes; Ontogenetic shifts; Predation; Southwest Atlantic.
Resumo: | ABSTRACT The eyespot skate, Atlantoraja cyclophora, is an endemic species from the southwestern Atlantic, occurring from Rio de Janeiro, Brazil, to northern Patagonia, Argentina. The feeding habits of this species, from off Uruguay and north Argentina, were evaluated using a multiple hypothesis modelling approach. In general, the diet was composed mainly of decapod crustaceans, followed by teleost fishes. Molluscs, mysidaceans, amphipods, isopods, lancelets and elasmobranchs were consumed in lower proportion. The consumption of shrimps drecreased with increasing body size of A. cyclophora. On the other hand, the consumption of teleosts increased with body size. Mature individuals preyed more heavily on crabs than immature individuals. Teleosts were consumed more in the south region (34º - 38ºS) and crabs in the north region (38º - 41ºS). Shrimps were eaten more in the warm season than in the cold season. Prey size increased with increasing body size of A. cyclophora , but large individuals also consumed small teleosts and crabs. Atlantoraja cyclophora has demersal-benthic feeding habits, shifts its diet with increasing body size and in response to seasonal and regional changes in prey availability and distribution.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300214
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20160032
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.14 n.3 2016
Fonte: | info:eu-repo/semantics/openAccess