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Fish diversity in the UHE Escola Engenharia Mackenzie Capivara reservoir, Paranapanema River, upper Rio Parana basin, Brazil, and the importance of large tributaries in its maitenance Diversidade de peixes do reservatario da UHE Escola Engenharia Mackenzie Capivara, Rio Paranapanema, bacia do alto rio Parana, Brasil, e a importancia dos grandes tributarios na sua manutencao






Iheringia Serie Zoologia. 30 setembro; 953: 319-325

Fish diversity in the UHE Escola Engenharia Mackenzie Capivara reservoir, Paranapanema River, upper Rio Parana basin, Brazil, and the importance of large tributaries in its maitenance Diversidade de peixes do reservatario da UHE Escola Engenharia Mackenzie Capivara, Rio Paranapanema, bacia do alto rio Parana, Brasil, e a importancia dos grandes tributarios na sua manutencao

Fish samples were taken in four stretches along a gradient formed by the UHE Escola Engenharia Mackenzie (Capivara) reservoir. The diversity of species was analyzed by the constance, index of Shannon-Wiener and similarity of the composition among stretches through the Jaccard's coefficient. The reservoir presents a richness of fishes composed by 67 species distributed in 5 orders; 47% of the species are constant, 15% are accessory and 28% are accidental. The highest values of Shannon-Wierier diversity and Jaccard's similarity were obtained in Cinzas and Tibagi, which are the most distant points from the dam and which present large tributaries. The lowest values were found in Cruzalia and Porecatu, which respectively correspond to the stretches with lotic and semi-lotic environmental characteristics. This work demonstrates the extreme importance of tributaries for the maintenance of species diversity in a reservoir, as a result of the preservation of the original characteristics of lotic systems in those river stretches and consequent reduction of the damming impact.


Accession: 038251614



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