Carbon sources and trophic position of the main species of fishes of Baía River, Paraná River floodplain, Brazil
Braz. j. biol
; Braz. j. biol;63(2): 283-290, May 2003. tab, graf, mapas
Article
en En
| LILACS
| ID: lil-343823
Biblioteca responsable:
BR1.1
ABSTRACT
In order to verify the carbon source and trophic position of the main species of fishes, of the Paraná River floodplain, we analysed the proportion of stable carbon (delta13C) and nitrogen (delta15N) isotopes in muscle of fishes sampled in the rainy season. We analyzed adult individuals of Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, Auchenipterus osteomystax, Iheringichthys labrosus, Leporinus friderici, and Serrasalmus marginatus. These data were compared with the results obtained by the analyzing stomach contents. The primary producers found in the Baía River were the C3 plants (riparian vegetation, macrophytes, periphyton, and phytoplankton) and the C4 plants (macrophytes). The results of the contribution analysis revealed that the carbon used by the species was derived from C3 plants. According to the trophic position estimates (diet and delta15N), the species primarily consumed Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, and Leporinus friderici and, secondarily Auchenipterus osteomystax, Iheringichthys labrosus, and Serrasalmus marginatus. There was no significant difference between the two methods utilized
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Asunto principal:
Plantas
/
Carbono
/
Peces
Límite:
Animals
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Braz. j. biol
Asunto de la revista:
BIOLOGIA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Brasil