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A specimen of P. squamosissimus caught in the Chavantes reservoir : originally from the North region, it may be competing with and contributing to a decline in the population of native species. However, it has become a key fishing resource in much of the country. Credit: Edmir Daniel Carvalho/CAUNESP, has become the predominant fish in the Jaguari reservoir and surrounding rivers, significantly diminishing the diversity of native fish species.
“Although this predator is widely distributed in hydroelectric dam reservoirs throughout Brazil, its potential effects on native species had never been studied before. Our analysis highlights considerable losses to fish species diversity in the region,” said Aymar Orlandi Neto, first author of the article. Conducted at the Ilha Solteira School of Engineering , the study was part of his PhD research at the Botucatu Institute of Biosciences with a scholarship from FAPESP.
, launched in March by the Brazilian Platform on Biodiversity and Ecosystem Services , which is supported by FAPESP via its Research Program on Biodiversity Characterization, Conservation, Restoration and Sustainable Use . Nevertheless, he proposed measures similar to those taken in other countries to deal with invader species. One such measure would be to permit hunting of this species throughout the year without size limits or a ban during the reproductive period, with the aim of eradicating it or at least reducing its abundance.
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