Ichthyofauna Of Streams From The Lower Iguaçu River Basin, Paraná State, Brazil

Ictiofauna De Riachos Da Bacia Do Baixo Rio Iguaçu, Estado Do Paraná, Brasil

dc.creatorLarentis C.
dc.creatorDelariva R.L.
dc.creatorGomes L.C.
dc.creatorBaumgartner D.
dc.creatorRamos I.P.
dc.creatorDe Oliveira Sereia D.A.
dc.date2016
dc.date2017-08-17T19:17:27Z
dc.date2017-08-17T19:17:27Z
dc.date.accessioned2018-03-29T05:27:00Z
dc.date.available2018-03-29T05:27:00Z
dc.identifierBiota Neotropica. Universidade Estadual De Campinas Unicamp, v. 16, n. 3, p. 1 - 11, 2016.
dc.identifier1676-0603
dc.identifier10.1590/1676-0611-BN-2015-0117
dc.identifierhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84982252215&doi=10.1590%2f1676-0611-BN-2015-0117&partnerID=40&md5=f4762e3093e575e9d9fb32563f31e4d7
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/324065
dc.identifier2-s2.0-84982252215
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1358228
dc.descriptionThe drainages of the Iguaçu River basin, as well as the main channel of the river, have peculiar characteristics resulting from geomorphological processes in this area, including the formation of the Iguaçu River Falls. This slope in the lower portion of the basin is a biogeographical barrier to many organisms. In this study was inventoried the fish fauna of streams of the lower Iguaçu River basin, evaluating possible differences in the species composition upstream and downstream of this biogeographical barrier. Sampling were conducted between 2004 and 2013, in five streams, three upstream and two downstream of the Iguaçu River Falls, using electrofishing. The nMDS analysis was run to investigate possible groupings of similar fauna between the streams sampled. The scores of this test were tested as to the significance of groupings with the Hotelling T2 test. The indicator value method (IndVal) was used to detect the distribution of species among the groups of the streams upstream and downstream of the Iguaçu River Falls. We collected 18,908 individuals of six orders, 11 families, and 40 species. Siluriformes and Characiformes had the highest species richness; Cyprinodontiformes presented the highest abundance. Considering the species recorded, 21 are considered natives to the Iguaçu River basin, including 15 endemic, wich were found only in streams upstream of the falls. Additional 18 species were verified only in the streams downstream of such barrier. Four species were common to both stretches. The axis 1 of the nMDS separated two groups: streams upstream (S1, S2 and S3) and streams downstream of the Iguaçu River Falls (S4 and S5). The indicator species analysis also indicated a distinction between the groups of streams, that were significantly different (Hotelling’s T2 = 234.36, p < 0.0001). The number of endemic species in the streams upstream of the Falls (15 spp.) evidences a significant effect of isolation promoted by the Iguaçu River Falls, and confirms the role of this barrier in the vicariant processes and endemism typical of this basin. These results emphasize the importance of conserving these ecosystems, once the extinction of species in this region means the irreversible loss of them. © 2016, Universidade Estadual de Campinas UNICAMP. All rights reserved.
dc.description16
dc.description3
dc.description1
dc.description11
dc.languageEnglish
dc.publisherUniversidade Estadual de Campinas UNICAMP
dc.relationBiota Neotropica
dc.rightsaberto
dc.sourceScopus
dc.subjectBiogeographic Barrier
dc.subjectEndemics Species
dc.subjectFish
dc.titleIchthyofauna Of Streams From The Lower Iguaçu River Basin, Paraná State, Brazil
dc.titleIctiofauna De Riachos Da Bacia Do Baixo Rio Iguaçu, Estado Do Paraná, Brasil
dc.typeArtículos de revistas


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