Dieta alimentar dos peixes comercializados no segundo semestre de 2020 e primeiro de 2021 na cidade de Tabatinga-AM

Abstract

Amazonian aquatic environments are one of the richest and most diverse in the world, this richness and diversity is reflected in the complexity of community structures and their relationships with the abiotic components that make up these ecosystems. The hydrological phenomenon that occurs in the Solimões/Amazonas River is responsible for shaping the physical and chemical structures of aquatic habitats, thus also changing the available food, as well as the eating habits of Amazonian species, with a period of high water (flood) that floods the marginal forest connecting rivers and lakes and expands the trophic area for fish and other low water (dry) which isolates water bodies and submits species to extreme variations in temperature and oxygen and increases the constancy of interspecific relationships. Therefore, this study aimed to describe the composition of the diet of species sold in the periods of flood and ebb in the city of Tabatinga/AM. The collections were carried out during the second semester of 2020 and the first semester of 2021. The collected specimens were identified using identification guides through photographs. The analysis of stomachs was performed at the Biology Didactic Laboratory located at the Center for Superior Studies of Tabatinga-UEA. To this end, the state of repletion was observed and the frequency of occurrence (Fo%) was subsequently calculated for both periods. Our results showed that there was a greater diversity of foods during the flood, during the drought the most frequent food item was plant debris, that is, foods of autochthonous origin, the most collected species was Prochilodos nigricans. We conclude that the hydrological cycle is responsible for influencing the composition of the diet of Amazonian fish.