Carbon primary sources and estuarine habitat use by two congeneric ariid catfishes in a subtropical coastal lagoon
Zoologia (Curitiba, Impr.)
; 33(2): e20150075, May 2016. ilus, tab
Article
em En
| VETINDEX
| ID: biblio-1504389
Biblioteca responsável:
BR68.1
Localização: BR68.1
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.
Palavras-chave
Texto completo:
1
Base de dados:
VETINDEX
Assunto principal:
Peixes-Gato
/
Isótopos de Carbono
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Estuários
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Laguna Costeira
Limite:
Animals
Idioma:
En
Revista:
Zoologia (Curitiba, Impr.)
Ano de publicação:
2016
Tipo de documento:
Article
/
Project document