dc.contributor
dc.creatorPENCZAK, T.; GOMES, L.C.; BINI, L.M.; AGOSTINHO, A.A.
dc.date2018-10-31T19:43:00Z
dc.date2018-10-31T19:43:00Z
dc.date.accessioned2023-10-16T12:28:06Z
dc.date.available2023-10-16T12:28:06Z
dc.identifierhttp://repositorio.uem.br:8080/jspui/handle/1/5284
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9211095
dc.descriptionPENCZAK, Tadeusz; GOMES, Luiz Carlos; BINI, Luis Maurício; AGOSTINHO, Angelo Antonio. The importance of qualitative inventory sampling using electric fishing and nets in a large, tropical river (Brazil). Hydrobiologia, Dordrecht, v.389, no.1-3, p.89-100, 1998.
dc.descriptionQualitative fish sampling (single catch) using three methods (electric fishing, gillnets, seine nets) was assessed at three sites in the Ivai River (Paraná State, Brazil) to check their usefulness for quick inventory investigations. Electric fishing at a constant effort (15 min per each) was considered to be the best sampling technique. Taxon richness was calculated as the expected number of species using a rarefraction technique. Samples of 300 325 individuals, and 6 10 repetitions in neighbouring segments were sufficient. Even though electric fishing was conducted with the same effort in similar segments at each site there were many differences in species abundance. This suggests that the estimated fish specimen number obtained with constant effort is of limited validity on one sampling occasion and may be best considered as an index of density only. The differences may partially be caused by the segments being located along the right and left bank of the large river (problem of different habitats). Qualitative and quantitative differences between electric fishing, gill-netting and seine-netting samples were very high at a high significance level. Nevertheless, as 22.4% taxa were caught only by gill or seine nets, these gears were important for complementing the species list.
dc.description
dc.publisherBrasil
dc.publisherUEM
dc.rightsopenAccess
dc.subjectIvaí, Rio
dc.subjectParaná (Estado)
dc.subjectBrasil
dc.subjectPesca elétrica
dc.subjectDiversidade.
dc.subjectLarge tropical river
dc.subjectIvaí River
dc.subjectParaná State
dc.subjectBrazil
dc.subjectDiversity
dc.subjectQualitative sampling
dc.subjectElectric fishing
dc.subjectGillnet
dc.subjectSeine net.
dc.subjectCiências Biológicas
dc.subjectEcologia
dc.titleThe importance of qualitative inventory sampling using electric fishing and nets in a large, tropical river (Brazil)
dc.typearticle


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