Stomach contents of 29 species of fish and the distribution of these species in different microhabitats in a stream (igarapé do Candirú) in Central Amazonia, were analysed. Seven different types of microhabitats were observed and some species presented adaptatives morphological structures that combined with feeding habits and microhabitat in which the species was always colected. The existence of the relationship between feeding habits and micro-habitat was observed. Other fish species changed microhabitat according to their state of development eventhough no change occurred in their feeding habits. In these cases, it is presumed that predation exercised greater control over distribution than did feeding. In the present work, the probable factors that influence fish species in their choice of microhabitat to be exploited are discussed.
Spacial distribution; feeding; fishes; stream; Amazonia