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Allocation of nutrients during the reproductive cycle of Ophidiaster ophidianus (Echinodermata: Asteroidea)

dc.contributor.authorMicael, Joana
dc.contributor.authorRodrigues, Armindo
dc.contributor.authorBarreto, Maria do Carmo
dc.contributor.authorAlves, Maria J.
dc.contributor.authorMalcolm, Jones
dc.contributor.authorCosta, Ana C.
dc.date.accessioned2012-05-31T11:22:41Z
dc.date.available2012-05-31T11:22:41Z
dc.date.issued2011-05-23
dc.descriptionCopyright © 2011 Taylor & Francis.en
dc.description.abstractThe reproductive cycle of Ophidiaster ophidianus (strictly protected status) from Sa˜o Miguel Island, in the Azorean Archipelago was studied. The reproductive strategy; the energy allocation of each sex during the reproductive cycle and the nutritional condition of the population were analyzed. Gonadal index (GI) showed a clear seasonal pattern with spawning between August and October but histological examination revealed that gamete release can occur throughout the entire year. The pyloric caeca index (PCI) showed little annual variation but with an inverse relationship with the GI. Allocation of energy to the gonads and to the pyloric caeca reflected the seasonal reproductive strategy of this species. Individuals were able to simultaneously develop gonads, pyloric caeca, and quickly regenerate lost arms. There was a major expenditure of energy by females compared to males but, sexual size dimorphism was not observed. The reproductive pattern observed in O. ophidianus combining rich food availability and seawater temperatures characteristic of a temperate zone may be the key to the success of this species in the Azorean oceanic Island.en
dc.description.sponsorshipPortuguese Foundation for Science and Technology (FCT).en
dc.identifier.citation"Invertebrate Reproduction & Development". ISSN 2157-0272. Volume 55, Issue 4, 2011, pp. 1-12(12).en
dc.identifier.issn0792–4259 (Print)
dc.identifier.issn2157-0272 (Online)
dc.identifier.urihttp://hdl.handle.net/10400.3/1372
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherTaylor & Francisen
dc.relation.publisherversionhttp://dx.doi.org/10.1080/00207233.2011.573673por
dc.subjectBiochemical Cycleen
dc.subjectEchinodermen
dc.subjectStrictly Protected Statusen
dc.subjectTemperate Zoneen
dc.titleAllocation of nutrients during the reproductive cycle of Ophidiaster ophidianus (Echinodermata: Asteroidea)en
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/BD/27550/2006
oaire.citation.endPage12por
oaire.citation.issue4por
oaire.citation.startPage1por
oaire.citation.titleInvertebrate Reproduction & Developmenten
oaire.citation.volume55por
oaire.fundingStreamSFRH
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isProjectOfPublication962fb6a6-4ba3-4620-8c41-8b5d610665d1
relation.isProjectOfPublication.latestForDiscovery962fb6a6-4ba3-4620-8c41-8b5d610665d1

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