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Zygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus

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dc.contributor.authorSequeira, Vera
dc.contributor.authorCouto, E.
dc.contributor.authorNeves, Ana
dc.contributor.authorVieira, Ana Rita
dc.contributor.authorPaiva, Rafaela Barros
dc.contributor.authorCanario, A. V. M.
dc.contributor.authorGordo, Leonel
dc.date.accessioned2019-06-25T12:26:36Z
dc.date.available2019-06-25T12:26:36Z
dc.date.issued2017
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 13·9 to 37·5 cm total length (LT ) were analysed from September 2011 to October 2012. The analysis included gonad maturity phases and blood-plasma levels of oestradiol-17β (E2 ), 11-ketotestosterone (11-KT) and 17,20β-dihydroxypregn-4-en-3-one (17,20β-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 17,20β-P in October for both sexes was associated with possible mating behaviour and recent copula. Levels of E2 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1111/jfb.13299pt_PT
dc.identifier.issn0022-1112
dc.identifier.urihttp://hdl.handle.net/10451/38851
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subject11-ketotestosteronept_PT
dc.subject17,20𝛽-dihydroxypregn-4-en-3-onept_PT
dc.subjectoestradiol-17𝛽pt_PT
dc.subjectreproductive strategypt_PT
dc.titleZygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopteruspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage2169pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage2157pt_PT
oaire.citation.titleJournal of Fish Biologypt_PT
oaire.citation.volume90pt_PT
person.familyNameSequeira
person.familyNameNeves
person.familyNameVieira
person.familyNamePaiva
person.familyNameGordo
person.givenNameVera
person.givenNameAna
person.givenNameAna Rita
person.givenNameRafaela Barros
person.givenNameLeonel
person.identifier.ciencia-id3515-0C30-9186
person.identifier.ciencia-id841A-6F45-B7F9
person.identifier.ciencia-id5418-2378-F22F
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person.identifier.orcid0000-0002-7205-9373
person.identifier.orcid0000-0002-9144-6061
person.identifier.ridB-1673-2012
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person.identifier.ridB-1677-2012
person.identifier.ridB-2828-2012
person.identifier.ridB-3604-2012
person.identifier.scopus-author-id24077692000
person.identifier.scopus-author-id57203312308
person.identifier.scopus-author-id26637827200
person.identifier.scopus-author-id6602175866
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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