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Do vertebrate-type steroids play a role in bivalve reproduction? a case study across two reproductive cycles of magallana gigas

2026-08Artigo científico Acesso aberto
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datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg02:Erradicar a Fome
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorRato, Ana Cláudia Nunes
dc.contributor.authorJoaquim, Sandra
dc.contributor.authorSilva, José Paulo da
dc.contributor.authorAnjos, Catarina
dc.contributor.authorMatias, Domitília
dc.contributor.authorHubbard, Peter
dc.date.accessioned2026-07-24T12:01:44Z
dc.date.available2026-07-24T12:01:44Z
dc.date.issued2026-08
dc.description.abstractIn bivalves, reproduction is regulated by a complex interaction between endogenous and environmental factors, including temperature and food availability. However, hormonal control of the reproductive cycle in bivalves is poorly understood. There is a general belief that vertebrate-type steroids (testosterone, progesterone and 17βoestradiol) are involved in the reproductive cycle of bivalves, even though the necessary enzymes and receptors for such steroids are apparently lacking in the molluscan genome. To investigate the potential role of vertebratetype steroids in reproduction, the current study characterized two consecutive reproductive cycles of the Pacific oyster (Magallana gigas), integrating biochemical composition, reproductive indices, environmental parameters, and steroid levels. Gonadal index (GI), gonadosomatic index, and condition index exhibited clear seasonal fluctuations. Protein, glycogen, and total lipid displayed distinct seasonal patterns, with protein exhibiting structural functions, whereas glycogen and total lipid acted as energy reserves supporting gametogenesis. Both progesterone (0.69-142.33 ng g− 1 ) and testosterone progesterone (2.55-262 ng g− 1 ) levels fluctuated during sampling; progesterone showed correlations with GI, temperature, and protein content, whereas testosterone was mainly associated with environmental factors. These patterns suggest that progesterone may reflect gonadal tissue development and energetic investment rather than acting as a classical sex steroid. The absence of sexspecific steroid patterns, together with the lack of classical steroid receptors in the molluscan genome, supports the hypothesis of an environmental origin and/or an eco-physiological rather than an endocrine role for vertebrate-type steroids in oysters. These findings demonstrate that hormonal studies in bivalves should integrate biochemical, reproductive, and environmental data to understand reproductive strategies.eng
dc.description.sponsorshipUID/04326/2025; UID/PRR/04326/2025
dc.identifier.doi10.1016/j.marenvres.2026.108202
dc.identifier.issn0141-1136
dc.identifier.urihttp://hdl.handle.net/10400.1/29307
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationChemical communication in bivalves: hormonal and pheromonal roles
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofMarine Environmental Research
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectPacific oyster
dc.subjectPhysiological condition
dc.subjectTestosterone
dc.subjectProgesterone
dc.subjectReproductive role
dc.subjectLC-HRMS
dc.titleDo vertebrate-type steroids play a role in bivalve reproduction? a case study across two reproductive cycles of magallana gigaseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberSFRH/BD/147215/2019
oaire.awardNumberLA/P/0101/2020
oaire.awardTitleChemical communication in bivalves: hormonal and pheromonal roles
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F147215%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.startPage108202
oaire.citation.titleMarine Environmental Research
oaire.citation.volume220
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameRato
person.familyNameSilva
person.familyNameHubbard
person.givenNameAna Cláudia Nunes
person.givenNameJosé Paulo da
person.givenNamePeter
person.identifier.ciencia-id6D14-EA6C-E8D1
person.identifier.ciencia-id3413-C4F4-73F7
person.identifier.ciencia-id951F-BA4B-A21F
person.identifier.orcid0000-0002-1150-2757
person.identifier.orcid0000-0002-6458-7328
person.identifier.orcid0000-0002-3007-4647
person.identifier.ridA-4606-2008
person.identifier.ridB-2823-2008
person.identifier.scopus-author-id7201733236
person.identifier.scopus-author-id7005928467
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
relation.isAuthorOfPublication1786b6bc-8eec-48b2-9535-70cef72f9e4c
relation.isAuthorOfPublicatione2004fa2-a47d-44b0-b11c-fc95fe51cbf9
relation.isAuthorOfPublicationf599b3ac-806b-4f65-9eb6-f70e68bcb142
relation.isAuthorOfPublication.latestForDiscovery1786b6bc-8eec-48b2-9535-70cef72f9e4c
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relation.isProjectOfPublication.latestForDiscovery52948376-a789-4466-8fac-c963f50846f8

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