River dams, free stretches and migratory fish species: a review of the state of the art in the state of São Paulo, Brazil

Autor: W. S. Smith, T. M. R. Santos, J. F. de C. T. Miranda, D. E. Cavallari, J. da S. Oliveira, R. Hernandes, T. R.de F. Lima, M. E. Mello, R. H. C. Rossi, L. L. Moro, L. G. N. de Carvalho
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Brazilian Journal of Biology, Vol 84 (2024)
Druh dokumentu: article
ISSN: 1678-4375
1519-6984
DOI: 10.1590/1519-6984.281076
Popis: Abstract Population growth combined with the need for electrical energy resulted in the construction of hundreds of hydroelectric plants in the state of São Paulo, Brazil. The consequence of these interventions was the fragmentation of rivers, forming barriers, that hinder the mobility of migratory fish species, generating an impact on the life cycle of these species, especially about movement between breeding and feeding areas. For this reason, this article aimed to evaluate the state-of-the-art knowledge regarding dams, free stretches, and migratory species in the three main river basins of the state of São Paulo and its tributaries. Through a systematic review from 2003 to 2023, 89 articles were obtained, 48 of which were about dams, 5 which addressed fish transposition systems, and 36 portraying migratory species. In the first half, research focused more on the impacts of dams on fish fauna, while in the second half of the period studied, studies of migratory fish were dominant. Most research was conducted in the main rivers, with few in the tributaries. Finally, 16 migratory species, considered long-distance, were studied, the most studied being P. lineatus, P. maculatus, L. friderici, M. obtusidens and S. hilarri and the ones that occurred most frequently in rivers are Prochilodus lineatus, Pimelodus maculatus, Megaleporinus obtusidens and Salminus hilarii. Therefore, we recommend maintaining the natural flow regime that still exists in the main rivers and tributaries of the state of São Paulo, to maintain healthy populations of the inventoried species.
Databáze: Directory of Open Access Journals
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