Dactylogyridae (Platyhelminthes; Monogenoidea) de Serrasalmus maculatus e S. spilopleura (Characiformes, Serrasalminae) na Bacia Amazônica, Sub-bacias Mamoré e Iténez da Bolívia /

Orientador : Walter A. BoegerDissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Biológicas, Programa de Pós-Graduaçăo em Zoologia. Defesa: Curitiba, 2008Inclui bibliografiaArea de concentraçăo: Zoologi

Upstream dam impacts on gilded catfish Brachyplatystoma rousseauxii (Siluriformes: Pimelodidae) in the Bolivian Amazon

This paper explores the effects of two run-of-river dams (Jirau and Santo Antônio) built in cascade in the middle Madeira River (Brazil) on the interruption of long-distance migration routes of the gilded catfish (Brachyplatystoma rousseauxii). A participative monitoring system was set up to compare capture by commercial fishers approximately 1500 km upstream ofthe dams in Bolivia, before (1998-2007) and after (2015-2017) dam closure. A significant decrease in gilded catfish catches and in catch per unit effort was observed after dam closure, whereas no significant difference in mean weight was found. Back-estimation of age suggests that the few individuals remaining after dam closure in 2009 are a mixture of old homers that returned upstream before dam closure, and residents hatched after dam closure and trapped in the upper Madeira. Unless fishways in the Madeira River dams improve their efficiency, the gilded catfish might become rare and in danger of regional extinction in the upper Madeira basin in the next few years, negatively affecting river fisheries.Fil: Van Damme, Paul A.. Instituto de Investigación Aplicada de Recursos Acuáticos; Bolivia. Universidad Mayor de San Simón; BoliviaFil: Córdova Clavijo, Leslie. Instituto de Investigación Aplicada de Recursos Acuáticos; BoliviaFil: Baigún, Claudio Rafael M.. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Hauser, Marilia. Universidade Federal de Rondônia; Brasil. Centre National de la Recherche Scientifique. Institut de Recherche pour le Développement; FranciaFil: da Costa Doria, Carolina R.. Centre National de la Recherche Scientifique. Institut de Recherche pour le Développement; Francia. Universidade Federal de Rondônia; BrasilFil: Duponchelle, Fabrice. Universidade Federal de Rondônia; Brasi

Dactylogyridae (Platyhelminthes; Monogenoidea) de Serrasalmus maculatus e S. spilopleura (Characiformes, Serrasalminae) na Bacia Amazônica, Sub-bacias Mamoré e Iténez da Bolívia /

Orientador : Walter A. BoegerDissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Biológicas, Programa de Pós-Graduaçăo em Zoologia. Defesa: Curitiba, 2008Inclui bibliografiaArea de concentraçăo: Zoologi