Ecologia alimentar do Odontostilbe paraguayensis (Characiformes, Characidae) no Pantanal do Nabileque

Abstract

The aim of this study was to evaluate how the differences in time of the Pantanal Nabileque may influence the eating habits of the species Odontostilbe paraguayensis. The specimens collected in four periods of the hydrological cycle: flood (February-April), flood (May-July), ebb (August-October), dry season (November to January) and repeating the flood in February of next year, totaling 13 months of the February/2009 February/2010 with sieves (80x120cm) with a grid of approximately 2 mm. Each fish was subjected to biometrics, which was weighed, measured and esviscerado. The stomach contents of each individual was removed, weighed (g) and subsequently analyzed under a magnifying glass. We analyzed the stomach contents of 303 individuals. The diet consisted of 79 food items. Filamentous algae, micro, insects (larvae of diptera and hymenoptera), debris and sediments were the most consumed by the species. The results of our studies indicated that the Odontostilbe paraguayensis can be considered an omnivorous species due to the balance of the food items found in their stomachs, both vegetable and Animal.