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Plasma concentrations of ovarian steroids in relation to oocyte final maturation and ovulation in female plaice sampled at sea

1998Journal article Restricted access
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dc.contributor.authorScott, A. P.
dc.contributor.authorWitthames, P. R.
dc.contributor.authorTurner, R. J.
dc.contributor.authorCanario, Adelino V. M.
dc.date.accessioned2014-05-13T09:36:11Z
dc.date.available2014-05-13T09:36:11Z
dc.date.issued1998
dc.date.updated2014-05-09T10:31:33Z
dc.description.abstractBlood plasma concentrations of free 17â-oestradiol, free testosterone and glucuronidated testosterone were strongly positively related to the percentage of vitellogenic oocytes remaining in the ovaries of plaice Pleuronectes platessa caught at sea—being at their highest in pre-spawning (stage IV) females (i.e. those in which the oocytes were close to fully grown, but had not yet entered the stage of final maturation). In contrast, the concentrations of free and sulphated 17,20â-P, 3á,17,20â-P-5â, and 3á,17,21-P-5â were at their lowest in stage IV females. Free 17,20â-P (the putative maturation-inducing steroid) became only slightly elevated (less than twofold) during spawning (i.e. in stage V and VI females with hydrated and/or ovulated eggs). Sulphated 17,20â-P and 3á,17,21-P-5â became slightly more elevated (three- to fourfold). However, sulphated 3á,17,20â-P-5â concentrations increased 30-fold and were at their highest in fish in which only 40% of vitellogenic oocytes remained in the ovaries. Sulphated 17,20â-P, 3á,17,20â-P-5â and 3á,17,21-P-5â concentrations were significantly positively related to hyaline oocyte batch size; and sulphated 17,20â-P and sulphated 3á,17,20â-P-5â were significantly negatively related to the degree of hydration of the hyaline oocytes. None of the steroid concentrations, however, was related to the time of capture. More ovulated females were found in the afternoon than at any other time of the day.por
dc.identifier.citationScott, A. P.; Witthames, P. R.; Turner, R. J.; Canario, A. V. M. Plasma concentrations of ovarian steroids in relation to oocyte final maturation and ovulation in female plaice sampled at sea, Journal of Fish Biology, 52, 1, 128-145, 1998.por
dc.identifier.issn0022-1112
dc.identifier.otherAUT: ACA00258;
dc.identifier.urihttp://hdl.handle.net/10400.1/3884
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherThe Fisheries Society of the British Islespor
dc.subjectReproductionpor
dc.subjectPlaicepor
dc.subjectSex steroidspor
dc.subject17,20â-dihydroxy-4-pregnen-3-onepor
dc.subjectMaturation-inducing steroidpor
dc.subjectOocyte final maturationpor
dc.titlePlasma concentrations of ovarian steroids in relation to oocyte final maturation and ovulation in female plaice sampled at seapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage145por
oaire.citation.issue1por
oaire.citation.startPage128por
oaire.citation.titleJournal of Fish Biologypor
oaire.citation.volume52por
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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