Fish fauna structure and composition in an isolated lake in the Middle Araguaia River floodplain, Mato Grosso – Brazil

Biotemas

关键词: Diversity;    Fishes;    Isolation;    Water transparency;   

DOI  :  

来源: DOAJ

【 摘 要 】

Studies dealing with fish fauna in floodplain lakes of the Araguaia River basin are limited, and have mostly focused on lakes that are directly connected to the main river and are heavily influenced by the flood pulse. Isolated lakes are relatively uncommon in this region and have received little attention in regards to their fish fauna. This work aims to discuss the structure, diversity and richness of the fish community of an isolated lake in the floodplain of the Middle Araguaia River, MT. Samples were made through two consecutive seasonal cycles, and yielded a total of 1312 fishes, distributed in 57 species, 19 families and six orders. The studied fish community presented high values of diversity. The results of this study suggest that the high water transparency in conjunction with the isolation of the lake acts as a primary factor, while the stability of the other abiotic variables acts as a secondary factor.

【 授权许可】

Unknown