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Effects of androgens on social behavior and morphology of alternative reproductive males of the Azorean rock-pool blenny

2001Journal article Restricted access
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dc.contributor.authorOliveira, R. F.
dc.contributor.authorCarneiro, L. A.
dc.contributor.authorCanario, Adelino V. M.
dc.contributor.authorGrober, M. S.
dc.date.accessioned2014-05-12T09:01:09Z
dc.date.available2014-05-12T09:01:09Z
dc.date.issued2001
dc.date.updated2014-05-09T09:58:20Z
dc.description.abstractIn the Azorean rock-pool blenny Parablennius sanguinolentus parvicornis two sequential reproductive tactics occur. Larger and older males establish breeding territories, while some of the smaller males become attached to nest-holder territories, acting as satellites on these territories, which they help to defend while trying parasitic fertilizations when females go in the nests to spawn. In the present paper we tested the effects of the androgens 17a-methyltestosterone (MT) and 11-ketotestosterone (KT) in the expression of male secondary sex characters and bourgeois behavior in satellite males. One week after satellites were implanted with Silastic tubes containing MT, KT, or castor oil (control), androgen-treated satellites had developed male secondary sex traits such as longer and wider male-type genital papilla and anal glands that secrete a sex pheromone, both traits being less expressed or absent, respectively, in satellite males. Androgen treatment had no effect on the gonadosomatic index or on the development of the testicular gland. KT treatment had a positive effect on relative liver weight. In terms of behavior, androgen-implanted individuals were less aggressive both in a mirror test and toward females when these were introduced into their tanks. MT-treated individuals spend more time inside the provided nests. Only androgen-implanted satellites managed to have the females entering their nests. When given a chance in a group tank either to try to attract females to their own nest or to act as satellites of an already established nest-holder’s nest, MT-implanted males spent significantly more time in their own nest than near the nest-holder nest. These data suggest that androgens, particularly testosterone testosterone, may be involved in mating tactic switching in this species.por
dc.identifier.citationOliveira, R.F.; Carneiro, L.A.; Canario, A.V.M.; Grober, M.S. Effects of Androgens on Social Behavior and Morphology of Alternative Reproductive Males of the Azorean Rock-Pool Blenny, Hormones and Behavior, 39, 2, 157-166, 2001.por
dc.identifier.doihttp://dx.doi.org/10.1006/hbeh.2001.1643
dc.identifier.issn0018-506X
dc.identifier.otherAUT: ACA00258;
dc.identifier.urihttp://hdl.handle.net/10400.1/3849
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherAcademic Presspor
dc.subjectAndrogenspor
dc.titleEffects of androgens on social behavior and morphology of alternative reproductive males of the Azorean rock-pool blennypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage166por
oaire.citation.issue2por
oaire.citation.startPage157por
oaire.citation.titleHormones and Behaviorpor
oaire.citation.volume39por
person.familyNameCanario
person.givenNameAdelino
person.identifier143624
person.identifier.ciencia-id1F1E-D3B3-F804
person.identifier.orcid0000-0002-6244-6468
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id56568523700
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication5f6e51ee-9113-469e-8b9e-f30f2d452521
relation.isAuthorOfPublication.latestForDiscovery5f6e51ee-9113-469e-8b9e-f30f2d452521

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