Feeding ecology of two sympatric species of the genus Jupiaba (Characiformes: Characidae) in streams in the Urucu River Basin, AM, Brazil.

Marina Barreira Mendonça, Luciano Fogaça de Assis Montag, Roberta Dannyele Oliveira Raiol, Wolmar Benjamin Wosiacki

Abstract


In aiming to highlight differences in feeding behaviour of fish inhabiting forest and gap areas, the diet of the Jupiaba abramoides and J. asymmetrica, from streams in the Rio Urucu Basin, Coari, Amazonas, Brazil were studied in August and November 2006 and April 2007. Based on an analysis of stomach content, it was possible to identify nine food items consumed by J. abramoides and 11 food items consumed by J. asymmetrica. There was no diet overlap between species, with J. abramoides being classified as generalist and J. asymmetrica as specialist. For J. abramoides, the item of greatest significance was vegetal fragment, while for J. asymmetrica, it was arthropod exoskeleton fragment. When comparing forest and gap areas, both species modified their diet with respect to the environment, although it was not statistically significant.

Keywords


Feeding; Jupiaba; Gap; Amazon; Dieta; Jupiaba; Clareira; Amazônia



DOI: http://dx.doi.org/10.31420/uakari.v8i1.122