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Passage performance of long-distance upstream migrants at a large dam on the Paraná River and the compounding effects of entry and ascent

Neotropical Ichthyology

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DOI: 10.1590/S1679-62252012000400011

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Abstract

This paper presents results of a fishway evaluation performed at the Engenheiro Sérgio Motta Hydroelectric Power Plant (known as Porto Primavera) - CESP, Paraná River, Brazil. The evaluation was designed to quantify entry and passage proportions of 4 long-distance migratory fish species: Brycon orbignyanus (piracanjuba), Piaractus mesopotamicus (pacu), Prochilodus lineatus (curimba), and Rhinelepis aspera (cascudo-preto). Proportions finding and entering the fishway differed between species, ranged from 7.4 % (Prochilodus lineatus) to 55.4% (Piaractus mesopotamicus). Also, proportion passing was different between species, ranged from 31% (R. aspera) to 100% (Prochilodus lineatus). Fish that were marked and released within the fishway had greater failure rates than those that entered volitionally. Total time to pass ranged from 1.48 hours (Prochilodus lineatus) to 178.9 hours (R. aspera). Failure rates were greatest in the lower end of the fishway. Although some individuals of all species passed successfully, significant challenges remain to restoring connectivity of the upper Paraná River.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Passage performance of long-distance upstream migrants at a large dam on the Paraná River and the compounding effects of entry and ascent
Series title:
Neotropical Ichthyology
DOI:
10.1590/S1679-62252012000400011
Volume
10
Issue:
4
Year Published:
2012
Language:
English
Publisher:
Sociedade Brasileira de Ictiologia
Contributing office(s):
Leetown Science Center
Description:
11 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
785
Last page:
795
Number of Pages:
11
Country:
Brazil
State:
Sáo Paulo States
City:
Mato Grosso Do Sul
Other Geospatial:
Paran� River