Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

摘要: in the Preto River, Jequitinhonha basin, Minas Gerais State,Brazil. Behavioral data were collected by snorkeling with four spatially separated groups (habituated), and direct observationsof shoals made using an underwater video camera (a total of 448 hours observations). This species showed diversetactics to obtain food. However, proved be predominately a specialist surface-picker, which adopted alternativetactics find food at certain times year, most notably when items on water surface became low. Feedingfrequency was shown negatively correlated agonistic behavior between conspecifics. Feeding associations alsorecorded anostomid