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Evaluation of techniques used to protect tailrace fishes during turbine maneuvers at Três Marias Dam, Brazil Neotropical Ichthyology
Andrade,Francisco de; Prado,Ivo Gavião; Loures,Raquel Coelho; Godinho,Alexandre Lima.
Turbine dewatering and stop/startup may lead to the death of tons of fish at Brazilian power dams. The Três Marias Dam (TMD) on the São Francisco River has adopted two techniques to reduce the quantity of fish, mostly mandi (Pimelodus maculatus, Pimelodidae), affected by these maneuvers. They are: (i) spill before turbine dewatering to attract fish out of the tailrace, and (ii) fish screens in the stop log slots during turbine stop/startup to prevent fish from entering the draft tube. Here, we investigated whether spill and fish screens reduced the quantity of fish affected by turbine dewatering and stop/startup at TMD. We also determined whether the biomass of mandi trapped during turbine dewatering may be predicted by turbine discharge (Q) and/or catch...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish kill; Fish screen; Pimelodus maculatus; Turbine dewatering; Turbine stop/startup.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400005
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