Physiological diversity in tolerance to water deprivation among species of South American desert rodents

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dc.contributor.authorBozinovic, F.
dc.contributor.authorCruz-Neto, A. P.
dc.contributor.authorCortes, A.
dc.contributor.authorDiaz, G. B.
dc.contributor.authorOjeda, R. A.
dc.contributor.authorGiannoni, S. M.
dc.contributor.institutionPontificia Univ Catolica Chile
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv La Serena
dc.contributor.institutionInst Argentino Invest Zonas Aridas
dc.date.accessioned2014-02-26T17:29:48Z
dc.date.accessioned2014-05-20T13:59:06Z
dc.date.available2014-02-26T17:29:48Z
dc.date.available2014-05-20T13:59:06Z
dc.date.issued2007-08-01
dc.description.abstractRodents from and and semi-arid deserts are faced with the problem of water conservation. The physiological responses of small rodents to such conditions have been intensively investigated over broad geographically disjunct areas. Despite the presence of xeric habitats in South America since the late Tertiary, some studies suggest that sigmodontine South-American desert rodents do not display the same diversity of physiological responses at the species level as those observed in other desert-dwelling species of rodents. In this paper, we analyzed the physiological responses to water deprivation, at the interespecific and interindividual level, among eight species of sigmodontine desert-dwelling rodents from different geographical areas within South-American deserts. Using randomization tests, we found no significant phylogenetic signal for resistance to water deprivation or for individual variability in this response. Contrary to our initial predictions, we observed that sigmodontine rodents from arid/semi-arid habitats (Monte Desert) had significantly lower rates of body mass loss per day (higher tolerances to water deprivation) than species from the hyperarid deserts. We showed that sigmodontine rodents from South America showed a remarkable diversity of physiological mechanisms for coping with water shortage resulting from different evolutionary adaptive strategies. This diversity, however, displays a rather unexpected pattern in terms of its geographical distribution. (c) 2007 Elsevier Ltd. All rights reserved.en
dc.description.affiliationPontificia Univ Catolica Chile, Fac Ciências Biol, Ctr Adv Studies Ecol & Biodivers, Dept Ecol, Santiago 6513677, Chile
dc.description.affiliationUNESP, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUniv La Serena, Fac Ciências, Ctr Estudios Avanzados Zonas Aridas, Dept Biol, La Serena, Chile
dc.description.affiliationInst Argentino Invest Zonas Aridas, RA-5500 Mendoza, Argentina
dc.description.affiliationUnespUNESP, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP, Brazil
dc.format.extent427-442
dc.identifierhttp://dx.doi.org/10.1016/j.jaridenv.2007.01.003
dc.identifier.citationJournal of Arid Environments. London: Academic Press Ltd Elsevier B.V. Ltd, v. 70, n. 3, p. 427-442, 2007.
dc.identifier.doi10.1016/j.jaridenv.2007.01.003
dc.identifier.issn0140-1963
dc.identifier.urihttp://hdl.handle.net/11449/21004
dc.identifier.wosWOS:000247288900004
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Arid Environments
dc.relation.ispartofjcr1.989
dc.relation.ispartofsjr0,763
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbody mass balancept
dc.subjectgeographic comparisonspt
dc.subjectphysiological tolerancespt
dc.subjectwater economypt
dc.titlePhysiological diversity in tolerance to water deprivation among species of South American desert rodentsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes5758081094133626[2]
unesp.author.orcid0000-0003-3552-6611[6]
unesp.author.orcid0000-0001-5270-7276[2]
unesp.author.orcid0000-0001-5246-0496[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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Artigos - Zoologia - IBRC