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Sex steroids of black scabbardfish, Aphanopus carbo, in relation to reproductive and migratory dynamics

2020Journal article Open access
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dc.contributor.authorFarias, I.
dc.contributor.authorCouto, Elsa
dc.contributor.authorLagarto, N.
dc.contributor.authorDelgado, J.
dc.contributor.authorCanario, Adelino
dc.contributor.authorFigueiredo, I.
dc.date.accessioned2020-07-23T08:53:39Z
dc.date.available2020-07-23T08:53:39Z
dc.date.issued2020
dc.date.updated2020-07-22T15:00:21Z
dc.description.abstractBlack scabbardfish, Aphanopus carbo, is a commercially important species that takes distant migrations throughout its life cycle. Sex steroids were measured by radioimmunoassay in the blood plasma of specimens caught off the Madeira Archipelago and mainland Portugal to link this species migratory path with its reproductive cycle. Furthermore, a pilot study using Mozambique tilapia (Oreochromis mossambicus) was designed to evaluate the effect of sample freshness on steroid levels because black scabbardfish blood was collected at separate times after specimens were caught. The changes in T and 11-KT concentrations between the time of blood extraction and the time after preservation did not statistically differ among the different methods applied. Therefore, measured black scabbardfish steroid concentrations were directly used in the subsequent data analyses. In females, E2 and in T concentrations peaked at a late stage of vitellogenesis. E2 concentration was significantly different between females caught off each area. Clustering E2 and T concentrations from all developing females resulted in the separation of two distinct groups, independently of their geographical area. In males, T and 11-KT were not significantly different between maturity stages. The hepatosomatic index of males caught off mainland Portugal was relatively high. This may reflect a mechanism for storing energy that will later be consumed during migration to the spawning grounds. The trend of sex steroids concentrations throughout the sexual maturation of the species is consistent with the morphological indicators and shows evidence of the reproductive and migratory pattern hypothesised for the black scabbardfish in NE Atlantic.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.aaf.2020.03.006pt_PT
dc.identifier.eid2-s2.0-85083015941
dc.identifier.slugcv-prod-1608408
dc.identifier.urihttp://hdl.handle.net/10400.1/14118
dc.language.isoporpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationDYNAMICS OF THE DEEP-SEA TELEOST BLACK SCABBARDFISH APHANOPUS CARBO LOWE, 1839 IN THE NORTHEAST ATLANTIC
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBlack scabbardfishpt_PT
dc.subjectDeep-seapt_PT
dc.subjectMadeirapt_PT
dc.subjectMainland Portugalpt_PT
dc.subjectMigrationpt_PT
dc.subjectSex steroidspt_PT
dc.titleSex steroids of black scabbardfish, Aphanopus carbo, in relation to reproductive and migratory dynamicspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDYNAMICS OF THE DEEP-SEA TELEOST BLACK SCABBARDFISH APHANOPUS CARBO LOWE, 1839 IN THE NORTHEAST ATLANTIC
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F64434%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.citation.titleAquaculture and Fisheriespt_PT
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.cv.cienciaid1F1E-D3B3-F804 | ADELINO VICENTE MENDONÇA CANÁRIO
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication5f6e51ee-9113-469e-8b9e-f30f2d452521
relation.isAuthorOfPublication.latestForDiscoverycc3f6bfd-86b1-45b2-a629-cddf25f1c828
relation.isProjectOfPublication015c269c-031e-4c53-9635-92f4b9e5e3d9
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