Data/hora: 13/06/2024 05:11:38

Provedor de dados: | Revista Brasileira de Zoologia
País: | Brazil
Título: | Carbon primary sources and estuarine habitat use by two congeneric ariid catfishes in a subtropical coastal lagoon
Autores: | Pereyra,Paula E.R.; Mont'Alverne,Renata; Garcia,Alexandre M.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Genidens barbus; Genidens genidens; Isotopic mixing models; Patos Lagoon; Stable isotopes.
Resumo: | ABSTRACT Although ariid catfishe species are known to use coastal systems during some stages of their life cycles, the energetic contribution of estuarine resources and habitat use by many species in this family are still unclear. We used stable isotope analyses to estimate the assimilation of primary carbon sources and to infer the use of estuarine and freshwater habitats by two ariid catfishes Genidens barbus (Lacepède, 1803) and Genidens genidens (Cuvier, 1829). An isotopic mixing model revealed that juveniles of both catfish species consume considerable amounts of estuarine-produced carbon sources (G. barbus: 54-87% and G. genidens: 36-84%). However, G. genidens adults rely more on freshwater-derived carbon sources (31-77%) than on estuarine sources (23-69%). These results support the hypothesis that both species occupy the estuary and assimilate organic carbon produced in this region during their early stages, but G. genidens adults consume carbon sources associated with the freshwater portion of the lagoon.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000200501
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-4689zool-20150075
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.33 n.2 2016
Fonte: | info:eu-repo/semantics/openAccess