Ocorrência de camarões em ambiente de igapó na Amazônia Central: um estudo de caso no Campus II da Universidade Federal do Amazonas em Itacoatiara (AM)

Abstract

Freshwater shrimp are essential for the maintenance of Amazonian aquatic ecosystems, participating in nutrient cycling, serving as indicators of water quality, in addition to their importance in the food chain. In this context, the objective of this study was to record the occurrence and abundance of freshwater shrimp captured monthly, from March to June 2024, in an igapó area at Campus II of the Federal University of Amazonas, located in Itacoatiara (AM). The collections were carried out by three people, over a period of 2 hours, using a dip net with a 2mm mesh. A total of three species were identified: Euryrhynchus amazoniensis, Euryrhynchus burchelli, and Macrobrachium carteri, totaling 271 individuals. Euryrhynchus amazoniensis showed 100% occurrence and a relative abundance of 93.7%, characterizing it as the dominant species in the community. Euryrhynchus burchelli showed 100% occurrence and a relative abundance of 4.1%, while Macrobrachium carteri had a 50% occurrence and a relative abundance of 2.2%. Community richness was two species in March and May, and three species in May and June. The results suggest the need for more data during seasonal fluctuations for comprehensive analyses of biological diversity and population structure.