| variation in prey selection of a piscivorous fish after the impoundment of a neotropical reservoir: prey size and type. | the relative abundance and size of prey fish in the stomachs of the predator acestrorhynchus pantaneiro were compared with those recorded in the field to estimate prey selection. fish samples were taken monthly in the manso reservoir (state of mato grosso, brazil) immediately after the impoundment, from march 2000 to february 2001 (period i) and from march 2003 to february 2004 (period ii). in period i, the small relative dominance of the prey in the environment seemed to have lead to random for ... | 2009 | 20738483 |