Fish species diversity in headwaters streams of Paraguay and Paraná Basins

Brazilian Archives of Biology and Technology

Yzel Rondon Súarez²  Sabrina Bigatão Valério²  Karina Keyla Tondado¹  Alexandro Cezar Florentino¹  Thiago Rota Alves Felipe¹  Lidiani Queli Lubas Ximenes¹  Luzia Da Silva Lourenço¹ 

[1] ,UEMS Centro Integrado de Análise e Monitoramento Ambiental Laboratório de EcologiaDourados MS ,Brasil

关键词: Community ecology;    fish diversity;    streams;    Paraguay Basin;    Paraná Basin;   

DOI  :  10.1590/S1516-89132007000700014

来源: SciELO

【 摘 要 】

The influence of spatial, temporal and environmental factors on fish species diversity in headwater streams in Paraguay and Paraná basins, Brazil was examined. A total of 4,605 individuals were sampled, distributed in 60 species. The sampled streams in Paraná basin presented a larger total species richness (42) than Paraguay streams (40). However the estimated richness was larger in Paraguay basin (53) than Paraná streams (50). The streams of Paraná basin had a greater mean species richness and evenness, while more individuals per sample were found in the Paraguay basin. Difference between the sub-basins were found in the Paraguay basin, while for the basin of Paraná, richness and evenness vary significantly between the sub-basins, but the number of individuals varied seasonally. The most important environmental factors to species diversity and abundance were altitude, water temperature, stream width and stream depth for both the basins.

【 授权许可】

CC BY-NC   
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