Diet of Crenicichla britskii (Perciformes: Cichlidae) in a stream of Rio Aguapeí basin, Upper Rio Paraná system, southeastern Brazil

Biota Neotropica

Fernando Zaniolo Gibran¹  Katiane Mara Ferreira¹  Ricardo M. C. Castro¹ 

[1] ,Universidade de São Paulo FFCLRP Departamento de BiologiaRibeirão Preto São Paulo ,Brazil

关键词: Cichlidae;    Crenicichla britskii;    diet;    Upper Rio Paraná system;    southeastern Brazil;    Cichlidae;    Crenicichla britskii;    dieta;    bacia do Alto rio Paraná;    sudeste do Brasil;   

DOI  :  10.1590/S1676-06032001000100007

来源: SciELO

【 摘 要 】

We qualitatively studied the gut contents of 20 specimens (36.1-71.3 mm standard length) of the pike cichlid Crenicichla britskii from a 100 m stretched second order stream running inside a small gallery forest in a large pasture area of Rio Aguapeí basin, State of São Paulo, southeastern Brazil. The diet, in terms of per cent composition, constituted primarily of aquatic insects (50%) (mostly immature forms), crustaceans (14.3%), unidentified organic material and filamentous green algae (both with 10.7%), followed by fishes and arachnids (both with 7.1%). Diet analysis indicates that C. britskii is a generalist insectivore with a relatively short digestive tube, which feeds on autochthonous items captured in a broad array of habitats such as in the water column or at the surface, buried in or over the bottom, or associated with macrophytes and submerged vegetation debris.

【 授权许可】

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