Hydroelectric undertaking deployment requires water impoundment and pond formation. As a consequence, part of river bed natural course is changed, also implying in water flow dynamic changes (lotic to lentic environment). Such changes can impact aquatic community, modifying its composition and benefiting some species and not others.

What is more, along such undertaking operation, some specific situations can jeopardize fish fauna, causing, for instance, that they get stuck in specific locations, due to water level oscillations in the reservoir or machine confinement during power station maintenance procedures.

To minimize possible impacts that such environment changes can have over ichtyofauna, Copel develops several programs that involve fish rescue during dam construction stage, and during hydroelectric operation, ichtyofauna regular monitoring in its reservoirs and actions aimed at fish survey, reproduction and release.

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Ichtyofauna Rescue and Monitoring

Committed to the conservation of biodiversity, Copel carries out several activities aimed at monitoring and rescuing fish, aiming to avoid, minimize and compensate for the impact on the ichthyofauna (fish fauna) existing in the reservoirs and rivers under its responsibility.

The first monitoring actions were started in 1993 and, since then, the Company’s activities have allowed the survey of different species and it has consolidated itself as an important tool in mapping the richness of ichthyofauna species in the monitored areas, including the identification of threatened species. of extinction.

Fish Reproduction and Repopulation

Foreseen as environment offset actions in benefit of the biodiversity, fish reproduction and repopulation activities started within the environment licensing scope of Governador Ney Aminthas de Barros Braga Hydroelectric Power Station, known at the time as Segredo Power Station.

Repopulation actions developed by Copel have environment mitigation and offset feature, as the fish raised in Fish Study Experimental Station (EEEI) do not have commercial interest, the aim is native species  conservation.