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Zygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus

2017-05Journal article Open Access
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dc.contributor.authorSequeira, V.
dc.contributor.authorCouto, Elsa
dc.contributor.authorNeves, A.
dc.contributor.authorVieira, A. R.
dc.contributor.authorPaiva, R. B.
dc.contributor.authorCanario, A.V.M.
dc.contributor.authorGordo, L. S.
dc.date.accessioned2019-11-20T15:07:38Z
dc.date.available2019-11-20T15:07:38Z
dc.date.issued2017-05
dc.description.abstractTwo hundred and seven individuals (103 females and 104 males) of bluemouth Helicolenus dactylopterus (Scorpaeniformes, Sebastidae), a commercially important deep-water species with an unusual reproductive strategy, from the eastern Atlantic Ocean ranging from 13<bold></bold>9 to 37<bold></bold>5 cm total length (L-T) were analysed from September 2011 to October 2012. The analysis included gonad maturity phases and blood-plasma levels of oestradiol-17 (E-2), 11-ketotestosterone (11-KT) and 17,20-dihydroxypregn-4-en-3-one (17,20-P). Results confirmed the existence of an annual reproductive cycle with asynchrony between females and males and a spawning season from January to May. A pronounced peak in 17,20-P in October for both sexes was associated with possible mating behaviour and recent copula. Levels of E-2 increased preceding the elevation of the gonado-somatic index during ovarian growth and were lower during regression and regeneration. The frequency distribution of oocyte-embryonic stages and variation of hormone levels suggest the existence of daily rhythms. Fertilization was detected between 2000-0000 and 0800-1200 h and spawning took place throughout the day peaking between 2000 and 0000 h. The cyclic pattern of sex steroids and ovarian recruitment provides a new insight into the reproductive strategy of this species.
dc.description.sponsorshipFundacao para a Ciencia e a Tecnologia SFRH/BPD/108917/2015, SFRH/BD/92769/2013
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1111/jfb.13299
dc.identifier.issn0022-1112
dc.identifier.issn1095-8649
dc.identifier.urihttp://hdl.handle.net/10400.1/13141
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.relationESTUDO DAS ESTRATÉGIAS REPRODUTIVAS DE PEIXES DE PROFUNDIDADE ASSOCIADOS A MONTES SUBMARINOS
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectTrout salmo-gairdneri
dc.subjectReproductive-cycle
dc.subjectOocyte growth
dc.subjectFish
dc.subjectFecundity
dc.subjectSebastes
dc.subjectSpermatogenesis
dc.subjectScorpaeniformes
dc.subjectDelaroche
dc.subjectRockfish
dc.titleZygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleESTUDO DAS ESTRATÉGIAS REPRODUTIVAS DE PEIXES DE PROFUNDIDADE ASSOCIADOS A MONTES SUBMARINOS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F70200%2F2010/PT
oaire.citation.endPage2169
oaire.citation.issue5
oaire.citation.startPage2157
oaire.citation.titleJournal of Fish Biology
oaire.citation.volume90
oaire.fundingStream5876
person.familyNameCouto
person.familyNameCanario
person.givenNameElsa
person.givenNameAdelino
person.identifier143624
person.identifier.ciencia-id1F1E-D3B3-F804
person.identifier.orcid0000-0001-9336-9963
person.identifier.orcid0000-0002-6244-6468
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id56568523700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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