RITMO DE ATIVIDADE DIÁRIA DE Osteoglossum bicirrhosum (PEIXES: OSTEOGLOSSIFORMES) EM QUATRO LAGOS DA RESERVA DE DESENVOLVIMENTO SUSTENTÁVEL MAMIRAUÁ (AM)

Rose Chaves, Mauricio Camargo, Helder Queiroz, Alexandre Hercos

Abstract


Diel activity studies in fishes has had applications in the understanding of the species biology and are applied to the support of management actions in controlled environments. This study calculates fish abundance as diel activity indicator for O. bicirrhosum in four lakes of Mamirauá Sustainable Development Reserve during the dry season (September). The abundances along the day were associated with food ingestion, the sex and body size of individuals. Sim ultaneously to the fish catches, physico-chemical water param eters were measured. Total length, sex, gonad maturity stage and stom ach repletion degree (GR) were established for each fish. O. bicirrhosum showed two main activity diel periods associated with the main food ingestion rates and digestion. There were not detected significant differences between males and females activity along the day. The activity of O. bicirrhosum was negatively associated for three lakes physico-chemical factors. The picks of activity were associated positively with periods of food ingestion.

Keywords


Aruanã; Osteoglossum bicirrhosum; Reserva Mamirauá; Médio rio Solimões; Arawana; Mamirauá Sustainable Development Reserve; Solimões river



DOI: https://doi.org/10.31420/uakari.v1i1.7