Trophic opportunism of Geophagus brasiliensis (Quoy and Gaimard, 1824) (Osteichthyes, Cichlidae) in Capivari Reservoir, state of Paraná, Brazil - DOI: 10.4025/actascibiolsci.v26i1.1657

• Autor(a) principal: Abelha, Milza Celi Fedatto
• Data de Publicação: 2008
• Outros Autores: Goulart, Erivelto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum Biological Sciences
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1657
• topic: Geophagus brasiliensis; acará; peixes; reservatório; dieta; 2.01.00.00-0 Biologia Geral

The feeding of adult Geophagus brasiliensis (Quoy and Gaimard, 1824) (Osteichthyes, Cichlidae) was investigated through the analysis of 149 stomachs contents collected quarterly at the Capivari Reservoir (28º8’34”S/48º58’55”W), state of Paraná, Brazil, during 1996 and 1998. Food spectrum was evaluated by frequency of occurrence and volumetric methods and also Alimentary Index (IAi). Spatial and temporal variations in the diet were assessed by analysis of variance (ANOVA/One-Way) of null models, using the axes scores of a detrented correspondence analysis (DCA). The years, the sampling sets and the seasons in relation to feeding resources were arranged. Results showed an omnivorous diet based on fruits/seeds (the most dominant), detritus, sediments, aquatic invertebrates and fish scales. The diet presented significant space-temporal differences, and consumption of food occured with higher disponibility, characterizing the trophic opportunism of the species