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Effects of salinity challenge on the endocrine control of osmoregulation and calcium homeostasis in the sea bream

1999Journal article Open access
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dc.contributor.authorGuerreiro, P. M.
dc.contributor.authorFuentes, J.
dc.contributor.authorFlik, G.
dc.contributor.authorCanario, Adelino V. M.
dc.contributor.authorPower, Deborah
dc.date.accessioned2014-10-24T13:59:52Z
dc.date.available2014-10-24T13:59:52Z
dc.date.issued1999
dc.description.abstractThe gilthead sea bream (Sparus auratu) is a marine species often found in coastal lagoons, experimenting episodic exposures to both brackish and hypersaline environments. However, little is known about the underlying endocrine mechanisms controlling osmoregulation in this and in most marine species. This study aimed at characterising some of the endocrine basis of sea bream osmoregulation, with emphasis on calcium homeostasis. Juvenile fish were exposed to different salinities, either by direct transfer or continuous adaptation over a short period of time. Salinities ranged from 0 to 55 p.p.t. and sampling was carried out 4, 24, 96 and 192 h after transfer. Six fish per group and per time point were sacrificed and plasma and tissue samples were collected. Osmolarity, osmolites and cortisol were measured in plasma. Prolactin, growth hormone, stanniocalcin, and calcitonin mRNA expressions were determined by PCR and northern blot. Mortality occurred after 4 hours in FW. Sea bream fry (2 month old, 20-60 may) were exposed to hypersaline and dilute seawater loaded with Ca and calcium fluxes were determined. Exposure of fry to lowered external salinity (50 and 25% SW) resulted in no mortality within 24 h and significantly decreased whole body calcium influx. Results will be discussed in relation to gene expression.por
dc.description.sponsorshipPMG is in receipt of a PRAXIS XXI grant BD/9207/96T. his study was funded by EC grant FAIR CT-96 1742.por
dc.identifier.citationPM Guerreiro, J Fuentes, G Flik, AVM Canario, DM Power,"Effects of salinity challenge on the endocrine control of osmoregulation and calcium homeostasis in the sea bream" in Comparative Biochemistry and Physiology A-molecular & Integrative Physiology - COMP BIOCHEM PHYSIOL PT A , vol. 124, pp. S80-S80, 1999.por
dc.identifier.doihttp://dx.doi.org/10.1016/S1095-6433(99)90314-8
dc.identifier.issn1095-6433
dc.identifier.otherAUT: PMG01122; DPO00386; ACA00258;
dc.identifier.urihttp://hdl.handle.net/10400.1/5497
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.titleEffects of salinity challenge on the endocrine control of osmoregulation and calcium homeostasis in the sea breampor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPageS80por
oaire.citation.issueSupl.por
oaire.citation.startPageS80por
oaire.citation.titleComparative Biochemistry and Physiology A-molecular & Integrative Physiologypor
oaire.citation.volume124por
person.familyNameGuerreiro da Costa Guerreiro
person.familyNameFuentes
person.familyNameCanario
person.familyNamePower
person.givenNamePedro Miguel
person.givenNameJuan
person.givenNameAdelino
person.givenNameDeborah Mary
person.identifierA-2539-2009
person.identifier392998
person.identifier143624
person.identifier.ciencia-id5C13-965D-3148
person.identifier.ciencia-id421B-E196-2C33
person.identifier.ciencia-id1F1E-D3B3-F804
person.identifier.ciencia-id891A-8A44-3CAE
person.identifier.orcid0000-0001-5371-7919
person.identifier.orcid0000-0003-0430-8734
person.identifier.orcid0000-0002-6244-6468
person.identifier.orcid0000-0003-1366-0246
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id7201832526
person.identifier.scopus-author-id56568523700
person.identifier.scopus-author-id7101806760
rcaap.rightsopenAccesspor
rcaap.typearticlepor
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