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Estimating fecundity in the zygoparous species Helicolenus dactylopterus (Actinopterygii, Scorpaeniformes): adaptation of the gravimetric method

2015Journal article Restricted access
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dc.contributor.authorSequeira, Vera
dc.contributor.authorNeves, Ana
dc.contributor.authorVieira, Ana Rita
dc.contributor.authorPaiva, Rafaela Barros
dc.contributor.authorCanário, Adelino
dc.contributor.authorGordo, Leonel
dc.date.accessioned2020-01-19T14:29:47Z
dc.date.available2020-01-19T14:29:47Z
dc.date.issued2015
dc.description.abstractBluemouth, Helicolenus dactylopterus is zygoparous species with internal fertilization spawning multiple batches of early-celled embryos in gelatinous masses. Its unusual reproductive strategy required methodological adjustments to estimate potential annual fecundity. The present study applied an adaptation of the gravimetric method, estimated batch fecundity based on different spawning fraction criteria (gestation, early-celled, and blastula females), and compared these estimates with the number of developing oocytes (NDOR) in the beginning of spawning to clarify the oocyte development pattern. Spawning fraction estimation based on the gestation criterion was considered the most reliable given its low variance and the subjectivity of staging early-celled embryos. On average, 87 batches were spawned with a mean spawning interval estimated at 1.73 days, and a mean relative annual total fecundity of 1,773 embryos g−1 carcass. The inexistence of a clear decreasing trend in the NDOR throughout the spawning season, and the lower NDOR estimates in females in the beginning of spawning comparing with relative annual fecundity (gestation criterion) suggests vitellogenic oocyte recruitment supporting previous results of indeterminate fecundity in Portuguese coast. The method proposed can be considered in fecundity studies of other commercial important species which extrudes gelatinous egg masses.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s10750-015-2291-4pt_PT
dc.identifier.issn0018-8158
dc.identifier.urihttp://hdl.handle.net/10451/41037
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectFecundity estimationpt_PT
dc.subjectReproductive strategiespt_PT
dc.subjectZygoparitypt_PT
dc.subjectBluemouthpt_PT
dc.titleEstimating fecundity in the zygoparous species Helicolenus dactylopterus (Actinopterygii, Scorpaeniformes): adaptation of the gravimetric methodpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage222pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage211pt_PT
oaire.citation.titleHydrobiologiapt_PT
oaire.citation.volume758pt_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
person.identifier.orcid0000-0001-7173-4982
person.identifier.orcid0000-0003-3885-2738
person.identifier.orcid0000-0002-5640-7999
person.identifier.orcid0000-0002-7205-9373
person.identifier.orcid0000-0002-9144-6061
person.identifier.ridB-1673-2012
person.identifier.ridB-3611-2012
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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