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dc.contributor.authorPavanato, Heloise J.
dc.contributor.authorMelo-Santos, Gabriel
dc.contributor.authorLima, Danielle S.
dc.contributor.authorPortocarrero-Aya, Marcela
dc.contributor.authorPaschoalini, Mariana
dc.contributor.authorMosquera, Federico
dc.contributor.authorTrujillo, Fernando
dc.contributor.authorMeneses, Rafael
dc.contributor.authorMarmontel, Miriam
dc.contributor.authorMaretti, Cláudio
dc.identifier.citationPavanato , H J , Melo-Santos , G , Lima , D S , Portocarrero-Aya , M , Paschoalini , M , Mosquera , F , Trujillo , F , Meneses , R , Marmontel , M & Maretti , C 2016 , ' Risks of dam construction for South American river dolphins : a case study of the Tapajós River ' , Endangered Species Research , vol. 31 , pp. 47-60 .
dc.identifier.otherPURE: 258894290
dc.identifier.otherPURE UUID: ab8fa411-e49b-4626-a8fa-92f3cef9cba8
dc.identifier.otherScopus: 85053361592
dc.identifier.otherORCID: /0000-0003-0359-2307/work/60427742
dc.descriptionFunding: This study was funded by the Ministério da Ciência, Tecnologia e Inovação (MCTI) through Mamirauá Institute for Sustainable Development, with support from the Omacha Foundation (Colombia) and Whitley Fund for Nature.en
dc.description.abstractRiver dolphins are strongly affected by the construction of hydroelectric dams. Potential isolation in subpopulations above and below such dams and the resulting low genetic variability of these subpopulations can cause extinction at a local level. Here we aimed to estimate density and population size of South American river dolphins (boto Inia geoffrensis and tucuxi Sotalia fluviatilis), map their distribution, and estimate potential biological removal (PBR) limits in order to evaluate the effects of population fragmentation between planned dams in the Tapajós River, Amazonian basin, Brazil. Boat-based surveys were conducted following a line transect sampling protocol covering different dolphin habitats in 2 stretches of the river divided by rapids. The mark-recapture distance sampling method was applied to account for animals missed on the trackline. After the estimation of population sizes by habitat, PBR was calculated. The farthest upriver sighting of tucuxis was close to the São Luiz do Tapajós rapids, whereas the farthest upriver sighting of botos was upstream of the rapids, suggesting that botos move upstream through the rapids. Estimated abundance of tucuxis (3372 ind., CV = 0.38) was twice as high as that estimated for botos (1815 ind., CV = 0.4). The PBR ranged from 11 to 18 ind. for boto and 21 to 34 for tucuxi. Throughout this study, we identified low abundances of river dolphins compared to other Amazon rivers. Boto may not be sustainable at a population level, due primarily to population fragmentation which would result from the construction of the proposed dams. Precautionary measures are urgently needed before construction of dams begins in the Tapajós River.
dc.relation.ispartofEndangered Species Researchen
dc.rights© The Authors 2016. Open Access under Creative Commons by Attribution Licence. Use, distribution and reproduction are un -restricted. Authors and original publication must be credited.en
dc.subjectCetacean abundanceen
dc.subjectDistance samplingen
dc.subjectInia geoffrensisen
dc.subjectSotalia fluviatilisen
dc.subjectIUCN Red List Categoryen
dc.subjectMarine mammalen
dc.subjectPopulation modelingen
dc.subjectNature and Landscape Conservationen
dc.titleRisks of dam construction for South American river dolphins : a case study of the Tapajós Riveren
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.description.statusPeer revieweden

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