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Environmental modulation of androgen levels and secondary sex characters in two populations of the peacock blenny Salaria pavo

2010-02Journal article Open access
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dc.contributor.authorSaraiva, João L.
dc.contributor.authorGonçalves, David M.
dc.contributor.authorOliveira, Rui F.
dc.date.accessioned2018-12-07T14:52:59Z
dc.date.available2018-12-07T14:52:59Z
dc.date.issued2010-02
dc.description.abstractMorphology and endocrinology were studied in two populations of the peacock blenny Salaria pavo, with different regimes of sexual selection imposed by differences in nest site availability. The peacock blenny is a small, sexually dimorphic benthic fish that presents exclusive paternal care of the clutch and inhabits rocky shores of the Mediterranean and adjacent Atlantic areas. In a population from the Gulf of Trieste (Northern Adriatic sea) inhabiting rocky shores where nest sites are abundant, male-male competition for nests is low, males court females and a low frequency of alternative reproductive tactics (small, parasitic female-mimicking sneaker males that change tactic into nest holders in subsequent breeding seasons) occurs. Conversely at Ria Formosa, a coastal lagoon in Southern Portugal, where nest sites are scarce and highly aggregated, male-male competition for nests is very high, there is sex-role reversal with female courtship and a high frequency of alternative reproductive tactics is observed. Concomitantly, at Ria Formosa nest holder males are larger and present more developed secondary sex characters and higher levels of 11 KT than at the Gulf of Trieste. However, the gonads of nest holders and parasitic males were larger in the Gulf of Trieste population. Competition for nests at Ria Formosa seems to promote more developed secondary sex characters in nest site scarcity conditions, while competition for females at the Gulf of Trieste seems to be spurring sperm competition among males in populations where nest sites are more abundant. 11 KT was thus associated with the development and expression of secondary sex characters in contrasting environments. These results exemplify how the modulation of behavioral plasticity and secondary sex characters by the social environment can be mediated by androgens. (c) 2009 Elsevier Inc. All rights reserved.
dc.description.sponsorshipFCT [UID 331/2001, PTDC/MAR/71351/2006]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.yhbeh.2009.10.013
dc.identifier.issn0018-506X
dc.identifier.urihttp://hdl.handle.net/10400.1/11296
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAcademic Press Inc Elsevier Science
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAlternative reproductive tactics
dc.subjectChallenge hypothesis
dc.subjectSocial modulation
dc.subjectTeleost fishes
dc.subjectMating success
dc.subjectCichlid fish
dc.subjectMales
dc.subjectFemales
dc.subjectBehavior
dc.subjectAggregations
dc.titleEnvironmental modulation of androgen levels and secondary sex characters in two populations of the peacock blenny Salaria pavo
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F71351%2F2006/PT
oaire.citation.endPage197
oaire.citation.issue2
oaire.citation.startPage192
oaire.citation.titleHormones and Behavior
oaire.citation.volume57
oaire.fundingStream3599-PPCDT
person.familyNameSaraiva
person.givenNameJoão
person.identifier292979
person.identifier.ciencia-id7A15-0E73-E652
person.identifier.orcid0000-0002-8891-8881
person.identifier.ridM-6167-2013
person.identifier.scopus-author-id26325116400
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication67e0a05e-e603-451e-b745-f63e2bc11676
relation.isAuthorOfPublication.latestForDiscovery67e0a05e-e603-451e-b745-f63e2bc11676
relation.isProjectOfPublication6741dda2-0e8f-4f67-9b1d-4751bb9f32f4
relation.isProjectOfPublication.latestForDiscovery6741dda2-0e8f-4f67-9b1d-4751bb9f32f4

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