Feeding habit of Bryconamericus microcephalus (Miranda-Ribeiro, 1908) was studied in order to detect differences related to habitat characteristics. Bimonthly samples were conducted during two annual cycles (August 2001 to September 2003), in two sites, 80 m long, that differed in the canopy densities (LF - covered site) and (LA - uncovered site). At each sampling date and site 15 B. microcephalus specimens were sampled. Stomach content of each specimen was analyzed through Numeric Frequency and Frequency of Occurrence. Food items were, then, classified as autochthonous or allochthonous, according to their origin. Insects were the main food item consumed by the specimens from both sites. Considering the analysis of LF no significant differences were registered for the consumption of allochthonous e autochthonous items. Nonetheless, predominance of autochthonous preys was detected in LA. Seasonal and spatial analyses of the contribution of allochthonous and autochthonous items, during the first study year, indicated that autochthonous prey prevailed during the dry season of LF and the rainy season of LA; no significant differences were registered during the second studied year. It is concluded that feeding habit of B. microcephalus did not varied in a predictable pattern.
Canopy; feeding resource; Ilha Grande; seasonality
