The Paranapanema River, a major tributary of the upper Paraná basin, has been heavily altered by eleven hydroelectric dams. As a result, the basin is highly fragmented and further impacted by the presence of more than sixty invasive fish species. We analyzed standard length (Ls), total weight (Wt) and relative condition factor (Kn) of Plagioscion squamosissimus—one of the impactful invasive species in the basin—across four different reservoirs. While the length and/or weight of individual croakers varied significantly among reservoirs, the relative condition factor remained statistically consistent, with mean values above 1. These findings indicate that P. squamossimus responds differently to the specific characteristics of each reservoir, while maintaining robust health and exhibiting remarkable plasticity in adaptation to diverse environments.
Agostinho, A.A.; Gomes, L.C.; Pelicice, F.M. (eds.) 2007. Ecologia e manejo de recursos pesqueiros em reservatórios do Brasil. Maringá, Eduem. 453p.
Agostinho, A.A.; Júlio-Júnior, H.F. 1996. Ameaça ecológica, peixes de outras águas. Rev. Cienc. Hoje 124: 36-44.
Agostinho, A.A.; Pelicice, F.M.; Gomes, L.C. 2008. Dams and the fish fauna of the Neotropical region: impacts and management related to diversity and fisheries. Braz. J. Biol. 68: 1119-1132.
Agostinho, A.A.; Gomes, L.C.; Santos, N.C.L.; Ortega, J.C.G.; Pelicice, F.M. 2016. Fish assemblages in Neotropical reservoirs: Colonization patterns, impacts and management. Fisheries Research 173: 26-36. https://doi.org/10.1016/j.fishres.2015.04.006
Albert, James S. et al. 2021. Scientists’ warning to humanity on the freshwater biodiversity crisis. Ambio 50(1): 85-94.
Auguie, B. 2017. gridExtra: Miscellaneous Functions for "Grid" Graphics. R package version 2.3, https://CRAN.R-project.org/package=gridExtra.
Barros, L.; Santos, U.; Zanuncio, J.; Dergam, J. 2012. Plagioscion squamosissimus (Sciaenidae) and Parachromis managuensis (Cichlidae): A Threat to Native Fishes of the Doce River in Minas Gerais, Brazil. PLoS ONE 7. https://doi.org/10.1371/journal.pone.0039138
Bennemann, S.T.; Capra, L.G.; Galves, W.; Shibatta, O.A. 2006. Dinâmica trófica de Plagioscion squamosissimus (Perciformes, Sciaenidae) em trechos de influência da represa Capivara (rios Paranapanema e Tibagi). Iheringia, Série Zoologia 96: 115-119. https://doi.org/10.1590/S0073-47212006000100020
Britto, Sandro Geraldo de Castro. 2009. A estratégia reprodutiva dos peixes migradores frente às escadas do Complexo Canoas (Rio Paranapanema, Bacia do Alto Paraná).
Britto, S.G. de C.; Carvalho, E.D. 2006. Ecological attributes of fish fauna in the Taquaruçu Reservoir, Paranapanema River (Upper Paraná, Brazil): composition and spatial distribution. Acta Limnologica Brasiliensia 18(4): 377-388.
Buckup, P.A.; Menezes, N.A.; Ghazzi, M.S. 2007. Catálogo das espécies de peixes de água doce do Brasil. Rio de Janeiro: Museu Nacional. 195p.
Casatti, L.; Langeani, F.; Castro, R.M.C. 2001. Peixes de riacho do Parque Estadual Morro do Diabo, bacia do alto rio Paraná, SP. Biota Neotropica 1: 1–15. http://dx.doi.org/10.1590/S1676-06032001000100005
Dechoum, M.S.; Junqueira, A.O.R.; Orsi, M.L. (Org.). 2024. Capítulo 1: Introdução. In: Relatório Temático sobre Espécies Exóticas Invasoras, Biodiversidade e Serviços Ecossistêmicos. São Carlos: Editora Cubo. p. 6–48. https://doi.org/10.4322/978-65-00-87228-6.cap1
Didham, Raphael K. et al. 2005. Are invasive species the drivers of ecological change? Trends in Ecology & Evolution 20(9): 470–474.
Ferreira, Dhiego G. et al. 2023. Different stocks of Prochilodus lineatus along the Cinzas River basin: contributions from a free-flowing tributary in the Capivara Reservoir region, Paranapanema River basin (upper Paraná River). Neotropical Ichthyology 21(4): e230080.
Ferraz, J.; Garcia, D.; Casimiro, A.; Geller, I.; Almeida, F.; Orsi, M. 2021. Length-weight relationship and relative condition factor of 31 small-sized fishes of the Paranapanema River basin. Boletim do Instituto de Pesca. https://doi.org/10.20950/1678-2305/bip.2021.47.e621
Ferraz, João Daniel et al. 2022. Early life stages and interannual variations of fish from Canoas reservoirs, lower Paranapanema River, Brazil. Actapesca News 10(2): 74–86.
Ferraz, João Daniel et al. 2024. Rising and spreading: First record and ecological aspects of Platanichthys platana (Regan, 1917) in a major tributary of the Upper Paraná River, Brazil. Acta Scientiarum: Biological Sciences 46.
Ganassin, M.J.M. et al. 2021. Effects of reservoir cascades on diversity, distribution, and abundance of fish assemblages in three Neotropical basins. Science of the Total Environment 778: 146246. https://doi.org/10.1016/j.scitotenv.2021.146246
Garcia, Diego Azevedo Zoccal et al. 2015. Ichthyofauna of streams of the Lower Paranapanema River basin, state of Paraná, Brazil. Check List 11(5): 1–8.
Hoeinghaus, D.J. et al. 2009. Effects of river impoundment on ecosystem services of large tropical rivers: embodied energy and market value of artisanal fisheries. Conservation Biology 23(5): 1222–1231. https://doi.org/10.1111/j.1523-1739.2009.01248.x
Iannone, R. et al. 2024. gt: Easily Create Presentation-Ready Display Tables. R package version 0.11.0, https://CRAN.R-project.org/package=gt.
Jarduli, Lucas Ribeiro et al. 2019. Fish fauna from the Paranapanema River basin, Brazil. Biota Neotropica 20(1): e20180707.
Júlio Júnior, H.F.; Tós, C.D.; Agostinho, Â.A.; Pavanelli, C.S. 2009. A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin. Neotropical Ichthyology 7(4): 709–718. https://doi.org/10.1590/S1679-62252009000400021
Kipper, D.; Bialetzki, A.; Santin, M. 2011. Composição taxonômica da assembleia de larvas de peixes no reservatório de Rosana, Rio Paranapanema, Brasil. Biota Neotropica 11: 421–426.
Kuriqi, A. et al. 2021. Ecological impacts of run-of-river hydropower plants—Current status and future prospects on the brink of energy transition. Renewable and Sustainable Energy Reviews 142: 110833.
Langeani, F. et al. 2007. Diversidade da ictiofauna do Alto Rio Paraná: composição atual e perspectivas futuras. Biota Neotropica 7: 181–197.
Lopes, C.M. et al. 2007. Fish passage ladders from Canoas Complex-Paranapanema River: evaluation of genetic structure maintenance of Salminus brasiliensis (Teleostei: Characiformes). Neotropical Ichthyology 5: 131–138.
Luo, Hongyun et al. 2023. Evaluation of the Influence of Upstream Flow on the Energy Characteristics of a Giant Kaplan Turbine. Water 15(22): 3920.
Ogle, D.H.; Doll, J.C.; Wheeler, A.P.; Dinno, A. 2025. FSA: Simple Fisheries Stock Assessment Methods. R package version 0.9.6. https://CRAN.R-project.org/package=FSA.
Panarari-Antunes, R.S. et al. 2015. Genetic characterization of native and invasive Plagioscion squamosissimus populations in Brazilian hydrographic basins. Genetics and Molecular Research 14(4): 14314–14324.
Pelicice, F.M.; AGOSTINHO, A.A. 2009. Fish fauna destruction after the introduction of a non-native predator (Cichla kelberi) in a Neotropical reservoir. Biological Invasions 11(8): 1789–1801.
Pelicice, F.M. et al. 2021. Large-scale degradation of the Tocantins-Araguaia River basin. Environmental Management 68: 445–452.
Reis, R.E. et al. 2016. Fish biodiversity and conservation in South America. Journal of Fish Biology 89(1): 12–47.
Simberloff, D. et al. 2013. Impacts of biological invasions: what's what and the way forward. Trends in Ecology & Evolution 28(1): 58–66.
Slik, J.W. Ferry et al. 2015. An estimate of the number of tropical tree species. Proceedings of the National Academy of Sciences 112(24): 7472–7477.
Soares, L.H. 1978. Revisão taxonômica dos sciaenídeos de água doce da região amazônica brasileira. Manaus, 72f. (Dissertação de Mestrado. INPA).
Vannote, R.L. et al. 1980. The river continuum concept. Canadian Journal of Fisheries and Aquatic Sciences 37(1): 130–137.
Vidotto-Magnoni, A.P. et al. 2015. Ichthyofauna of streams of the Lower Paranapanema River basin, Paraná State, Brazil. CheckList 11(5): 1–8.
Voss, R.S.; Emmons, L. 1996. Mammalian diversity in Neotropical lowland rainforests: a preliminary assessment. Bulletin of the AMNH 230.
Ciências Ambientais, Ambientes Aquáticos e Costeiros.
BJAST adota a política de publicação contínua de artigos. Assim, sempre que um manuscrito for aprovado para publicação, estará imediatamente disponível para leitura.