Defining a fish bio-assessment tool to monitoring the biological condition of a cascade reservoirs system in tropical area

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dc.contributor.authorPetesse, Maria Letizia [UNESP]
dc.contributor.authorPetrere, Miguel
dc.contributor.authorAgostinho, Angelo Antonio
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniv Santa Cecilia
dc.contributor.institutionUniversidade Estadual de Maringá (UEM)
dc.date.accessioned2014-12-03T13:11:03Z
dc.date.available2014-12-03T13:11:03Z
dc.date.issued2014-08-01
dc.description.abstractWe studied five tropical reservoirs in the cascade system of the Tiete River (State of Sao Paulo, Brazil) in order evaluate the suitability of a fish multimetric index (Reservoir Fish Assemblage Index-RFAI) as a bio-assessment tool. For this purpose, we investigated the spatial and temporal variability of the RFAI with the objectives of testing the effects of the unit measure (catch in numbers or individual weight) of abundance and trophic metrics categories on the index response and, to identify the best sampling season for a bio-assessment program. We located seventy-two sampling sites in three different reservoir zones( fluvial, transition, and lacustrine) and collected samples by habitats -lateral (L), tributary mouth (M) and central (C) - inside each reservoir zone. We recorded the fish assemblages and several physicochemical and habitat variables in the dry and rainy seasons. We tested candidate metrics for range, responsiveness, and redundancy and selected nine for inclusion in the final indices (RFAI(N), the index calculated when we expressed fish in number of individuals, per species, and RFAI(W), calculated when we expressed fishes in weight, per species). We used a discrete scoring criterion (1,3,5), and the final indices varied from 9 to 45. RFAI(N) and RFAI(W) were highly correlated and able to detect a clear spatial variability among the five reservoirs. RFAI(N) showed a higher temporal variability especially in the smaller reservoirs of the system (Bariri, Ibitinga and Nova Avanhandava), allowing us to consider the dry season as the preferable sampling period for the development of bio-assessment programs. RFAI(W) appeared to be more responsive than RFAIN, and was in agreement with the environmental gradients observed when analyzing the physico chemical and habitat variables collected in the present study. These findings indicate that the fish multimetric approach is a suitable tool for the assessment of the biological conditions of these reservoirs. (C) 2014 Elsevier B. V. All rights reserved.en
dc.description.affiliationUNESP, Dept Ecol, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUFSCar PPG Diversidade Biol Conservacao, BR-18052780 Sorocaba, SP, Brazil
dc.description.affiliationUniv Santa Cecilia, Programa Posgrad Sustentabilidade Ecossistemas Co, BR-11045907 Santos, SP, Brazil
dc.description.affiliationUEM NUPELIA Bloco H90, BR-87020900 Maringa, Parana, Brazil
dc.description.affiliationUnespUNESP, Dept Ecol, BR-13506900 Rio Claro, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 07/50985-2
dc.format.extent139-150
dc.identifierhttp://dx.doi.org/10.1016/j.ecoleng.2014.03.070
dc.identifier.citationEcological Engineering. Amsterdam: Elsevier Science Bv, v. 69, p. 139-150, 2014.
dc.identifier.doi10.1016/j.ecoleng.2014.03.070
dc.identifier.issn0925-8574
dc.identifier.urihttp://hdl.handle.net/11449/112788
dc.identifier.wosWOS:000338928200017
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofEcological Engineering
dc.relation.ispartofjcr3.023
dc.relation.ispartofsjr1,042
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectFish multimetric indexen
dc.subjectCascade reservoirs systemen
dc.subjectTropical environmenten
dc.subjectBrazilen
dc.titleDefining a fish bio-assessment tool to monitoring the biological condition of a cascade reservoirs system in tropical areaen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0002-4707-9444[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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