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Intra-sexual variation in male reproduction in teleost fish: A comparative approach

dc.contributor.authorOliveira, Rui Filipe
dc.contributor.authorRos, Albert F. H.
dc.contributor.authorGonçalves, David
dc.date.accessioned2012-03-26T18:37:40Z
dc.date.available2012-03-26T18:37:40Z
dc.date.issued2005
dc.description.abstractThe occurrence of intra-sexual variation in reproduction is a widespread phenomenon in teleosts. One such form of variation consists in the occurrence of alternative male types: males that invest resources in mate attraction and males that exploit the investment of the former males, by trying to sneak fertilizations during spawning. These alternative reproductive tactics can be classified according to their plasticity during the life span of the individuals (i.e., fixed vs. sequential vs. reversible). Furthermore, the differences between morphs within a given species may involve a set of different traits, including reproductive behavior, the differentiation of male morphological traits, and the patterns of gonad tissue allocation and the differentiation of gonadal accessory glands. In this paper, we review the available data on four species exhibiting different types of intra-sexual plasticity in reproduction that have been studied in our lab. The data on the proximate mechanisms, androgens and forebrain arginine-vasotocin (AVT), underlying these alternative tactics suggest that between-morph differences in androgen levels, especially in 11-ketotestosterone, are especially present in species where the alternative male types have evolved morphological traits that are tactic-specific (i.e., sexual polymorphisms) and that differences in AVT appear to be related to between-morph differences in the expression of courtship behavior. Therefore, this comparative approach leads us to propose that the different endocrine systems are involved in the differentiation of different sets of traits that make up alternative phenotypes, and that the differentiation of alternative tactics is not controlled by a single endocrine system (e.g., androgens).por
dc.identifier.citationHormones and Behavior, 48, 430-439por
dc.identifier.issn0018-506X
dc.identifier.urihttp://hdl.handle.net/10400.12/1295
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectSexual plasticitypor
dc.subjectAlternative reproductive tacticspor
dc.subjectFishpor
dc.subjectAndrogenspor
dc.subjectTestosteronepor
dc.subject11-ketotestosteronepor
dc.subjectArginine vasotocinpor
dc.subjectReproductive behaviorpor
dc.titleIntra-sexual variation in male reproduction in teleost fish: A comparative approachpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmsterdampor
oaire.citation.endPage439por
oaire.citation.startPage430por
oaire.citation.titleHormones and Behaviorpor
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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