Population dynamics, sex ratio and size at sex change in a protandric simultaneous hermaphrodite, the spiny shrimp Exhippolysmata oplophoroides

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dc.contributor.authorBaeza, J. A.
dc.contributor.authorBraga, A. A.
dc.contributor.authorLopez-Greco, L. S.
dc.contributor.authorPerez, E.
dc.contributor.authorNegreiros-Fransozo, M. L. [UNESP]
dc.contributor.authorFransozo, Adilson [UNESP]
dc.contributor.institutionSmithsonian Trop Res Inst
dc.contributor.institutionSmithsonian Marine Stn Ft Pierce
dc.contributor.institutionUniv Catolica Norte
dc.contributor.institutionUniversidade Federal do Espírito Santo (UFES)
dc.contributor.institutionUniv Buenos Aires
dc.contributor.institutionCEAZA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:54:06Z
dc.date.available2014-05-20T13:54:06Z
dc.date.issued2010-12-01
dc.description.abstractOne of the main goals of sex allocation theory is understanding sex ratio evolution. However, theoretical studies predicting sex ratios in species with unusual sexual systems, such as protandric simultaneous (PS) hermaphroditism, are rare. In PS hermaphrodites, juveniles first develop into functional males that mature into simultaneous hermaphrodites later in life. Here, we report on the sex ratio (males/males + hermaphrodites) in the PS hermaphroditic shrimp Exhippolysmata oplophoroides. A 2-year study demonstrated that hermaphrodites dominated the population in two different bays. This skewed sex ratio may be explained by limited encounter rates among conspecifics. In agreement with this idea, the density of shrimps was extremely low (a parts per thousand currency sign1 shrimp km(-2)) at the two study sites. Size at sex phase change and sex ratios remained relatively stable through time at the two bays. The stability of these parameters might be explained by the rather steady population structure of this species during the study period. A review of sex ratios in PS hermaphroditic shrimps (Lysmata and Exhippolysmata) revealed considerable variation; some species have male- and others hermaphrodite-skewed sex ratios. The conditions explaining inter- and intra-specific sex ratio variation in protandric simultaneous hermaphroditic species remain to be addressed.en
dc.description.affiliationSmithsonian Trop Res Inst, Balboa 084303092, Ancon, Panama
dc.description.affiliationSmithsonian Marine Stn Ft Pierce, Ft Pierce, FL 34949 USA
dc.description.affiliationUniv Catolica Norte, Fac Ciencias Mar, Dept Biol Marina, Larrondo 1281, Coquimbo, Chile
dc.description.affiliationUFES, Ctr Ciencias Agr, Dept Vet Med, BR-29500000 Alegre, ES, Brazil
dc.description.affiliationUniv Buenos Aires, FCEyN, Dept Biodivers & Expt Biol, Buenos Aires, DF, Argentina
dc.description.affiliationCEAZA, Coquimbo, Chile
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Zool, Ecol & Culture Study Grp,NEBECC Crustacean Biol, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Zool, Ecol & Culture Study Grp,NEBECC Crustacean Biol, BR-18618000 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipSTRI
dc.description.sponsorshipSMSFP
dc.description.sponsorshipIdFAPESP: 94/4848-4
dc.description.sponsorshipIdFAPESP: 98/3234-6
dc.format.extent2643-2653
dc.identifierhttp://dx.doi.org/10.1007/s00227-010-1525-2
dc.identifier.citationMarine Biology. New York: Springer, v. 157, n. 12, p. 2643-2653, 2010.
dc.identifier.doi10.1007/s00227-010-1525-2
dc.identifier.issn0025-3162
dc.identifier.lattes4475960200256592
dc.identifier.orcid0000-0002-2067-5406
dc.identifier.urihttp://hdl.handle.net/11449/19319
dc.identifier.wosWOS:000284161900006
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofMarine Biology
dc.relation.ispartofjcr2.215
dc.relation.ispartofsjr1,085
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titlePopulation dynamics, sex ratio and size at sex change in a protandric simultaneous hermaphrodite, the spiny shrimp Exhippolysmata oplophoroidesen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes4475960200256592[6]
unesp.author.orcid0000-0002-8070-8089[5]
unesp.author.orcid0000-0002-2573-6773[1]
unesp.author.orcid0000-0002-2067-5406[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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Artigos - Zoologia - IBB