Inventário Da Ictiofauna Da Bacia Do Rio Ivaí, Paraná, Brasil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)We compiled data on fish fauna of the Ivaí River basin from recent specialised literature, standardised sampling and records of species deposited in fish collections. There were 118 fish species of eight orders and 29 families. Of these, 100 species are autochthonous (84.8%), 13, allochthonous (11.0%) and five, exotic (4.2%). The main causes for the occurrence of non-native species are escapes from aquaculture, introduction for fishing purposes and the construction of the Itaipu hydroelectric plant. The predominance of small and medium-sized Characiformes and Siluriformes, including 13 species new to science, accounts for approximately 11.0% of all species and 13.0% of all native species. About 10.2% of all species and 12.0% of all native species are endemic to the upper stretch of the Ivaí River, isolated by numerous waterfalls in tributary rivers and streams. The Ivaí River basin is subjected to various anthropogenic interferences such as pollution, eutrophication, siltation, construction of dams, flood control, fisheries, species introduction and release of fingerlings. These activities raise concerns about biodiversity of Brazilian inland waters especially regarding the fish fauna; the basin of the Ivaí River already has species classified in categories of extinction risk: Brycon nattereri and Apareiodon vladii (Vulnerable) and Characidium heirmostigmata and Steindachneridion scriptum (Endangered). The high species richness of native fish, endemism of some, high environmental heterogeneity, high risk of extinction and lack of knowledge of several other species along with the eminent human activities raise the need to enrich the scientific knowledge for future conservation efforts for the studied basin. © 2016, Universidade Estadual de Campinas UNICAMP. All rights reserved.163CNPq, Conselho Nacional de Desenvolvimento Científico e TecnológicoConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Inventory Of The Ichthyofauna From The Jordão And Areia River Basins (iguaçu Drainage,brazil) Reveals Greater Sharing Of Species Than Thought

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Recent sampling on fish from the headwaters of the Jordão and Areia rivers,combined with collection databases and specialized literature reports,yielded the first species inventory. Both basins reflect the high endemism rate associated with the Iguaçu River. However,four species previously thought to be restricted to the Jordão River basin are now known to also occur in the basin of the Areia River: Astyanax jordanensis Vera Alcaraz,Pavanelli & Bertaco,2009; Characidium travassosi Melo,Buckup & Oyakawa,2016; Jenynsia diphyes Lucinda,Ghedotti & Graça,2006; and Trichomycterus igobi Wosiacki & de Pinna,2008. This suggests an ancestral connection between the tributaries of the Jordão and Areia rivers,with putative drainage rearrangements resulting from the uplift of the Serra da Esperança. The endemic fauna of this region is presently threatened by invasive species,the construction of dams,and other human activities. © 2016 Check List and Authors.126CNPq, Conselho Nacional de Desenvolvimento Científico e TecnológicoConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq