DIET COMPOSITION, CONDITION FACTOR AND INTESTINAL COEFFICIENT OF THE FISH Astyanax lineatus REFLECT THE ANTHROPOGENIC EFFECTS ON STREAMS IN CENTRAL BRAZIL

• DOI: 10.4257/oeco.2022.2604.06
• Publication Date: 2022-12-15T12:52:38Z
• Authors: Anna Carolina Res...; Fransciso Severo-...; Fernando Rogério ...
• Keywords: Detritus; Aquatic insect; Characidae; Biota

Human activities, such as urbanization, can cause instability in the aquatic biota. This modify food resource availability, consequently shifting diet composition of fish. Because consumed by fish closely affects anatomy their digestive tract, it also alter intestinal coefficient. In this study, we analyzed composition, condition factor and coefficient Astyanax lineatus (Perugia, 1891) from two distinct habitats: a “degraded habitat” (Cabaça stream) reserve inside city perimeter “preserved (Salobra River) Mato Grosso do Sul State, Central Brazil. We found total 15 items, all which were urban stream, with predominance detritus Chironomidae larvae, six natural area, plant remains. There was difference between fishes areas ( p < 0.05, PERMANOVA); however, there no significant inter-individual variability. The most frequent items habitat”, while insect remains frequent. relative measured fish's length-weight relationship not significantly different habitats. individuals each habitat, longer habitat. Therefore, even though A. is known to be generalist species, its feeding plasticity depends on ecological integrity types