Contemporary gene flow and weak genetic structuring in Rococo toad (Rhinella schneideri) populations in habitats fragmented by agricultural activities

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dc.contributor.authorArruda, Maurcio P. [UNESP]
dc.contributor.authorMorielle-Versute, Eliana [UNESP]
dc.contributor.authorSilva, Artur
dc.contributor.authorSchneider, Maria Paula C.
dc.contributor.authorGoncalves, Evonnildo C.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFed Univ Para
dc.date.accessioned2014-05-20T14:03:40Z
dc.date.available2014-05-20T14:03:40Z
dc.date.issued2011-01-01
dc.description.abstractThe reduced vagility and philopatric behaviour of most amphibians make them especially vulnerable to the effects of habitat fragmentation, in particular the loss of genetic variation. However, almost no data are available on the effects of agricultural practices on populations of Neotropical amphibians. Here, the genetic diversity of Rococo toad (Rhinella schneideri) populations in the highly disturbed landscape of the north-western region of the Brazilian state of São Paulo was analysed using microsatellite markers. Two areas were sampled - one dominated by open pastures (four populations) and the other by sugar cane plantations (two populations) - in an attempt to evaluate the possible influence of the type of anthropogenic matrix on genetic variability and gene flow (dispersion). The populations presented a relatively uniform genetic stock, with low levels of inbreeding (Fis) and high levels of admixture between localities (Fst, Rst, STRUCTURE) indicating no genetic subdivision. The results indicated relatively high levels of recent migration among sites (m) and no isolation by distance. The analyses also found that historical and contemporary rates of migration among populations were broadly similar. Overall, then, neither type of matrix appeared to have an effect on the connectivity of the Rococo toad populations. This suggests that the species has a considerable capacity for dispersal, allowing it to maintain a relatively homogeneous population, even under intense human pressure.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Dept Bot & Zool, Lab Chiroptera, BR-15061000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationFed Univ Para, Inst Ciencias Biol, Lab Polimorfismo DNA, BR-66075900 Belem, Para, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Dept Bot & Zool, Lab Chiroptera, BR-15061000 Sao Jose do Rio Preto, 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.sponsorshipIdCNPq: 152757/2007-4
dc.format.extent399-411
dc.identifierhttp://dx.doi.org/10.1163/017353711X588182
dc.identifier.citationAmphibia-reptilia. Leiden: Brill Academic Publishers, v. 32, n. 3, p. 399-411, 2011.
dc.identifier.doi10.1163/017353711X588182
dc.identifier.issn0173-5373
dc.identifier.urihttp://hdl.handle.net/11449/22386
dc.identifier.wosWOS:000294418500011
dc.language.isoeng
dc.publisherBrill Academic Publishers
dc.relation.ispartofAmphibia Reptilia
dc.relation.ispartofjcr1.105
dc.relation.ispartofsjr0,692
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectanthropogenic disturbanceen
dc.subjectgene flowen
dc.subjectGenetic diversityen
dc.subjecthigh dispersionen
dc.subjectMicrosatelliteen
dc.subjectPopulation structureen
dc.titleContemporary gene flow and weak genetic structuring in Rococo toad (Rhinella schneideri) populations in habitats fragmented by agricultural activitiesen
dc.typeArtigo
dcterms.licensehttp://www.brill.com/about/policies/open-access-policy
dcterms.rightsHolderBrill Academic Publishers
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

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Artigos - Zoologia e Botânica - IBILCE