Repository logo
 
Publication

Calcium balance in sea bream (Sparus aurata): the effect of oestradiol-17 beta

2002Journal article Open access
Simple item page
dc.contributor.authorGuerreiro, P. M.
dc.contributor.authorFuentes, J.
dc.contributor.authorCanario, Adelino V. M.
dc.contributor.authorPower, Deborah
dc.date.accessioned2014-05-14T09:53:18Z
dc.date.available2014-05-14T09:53:18Z
dc.date.issued2002
dc.date.updated2014-05-09T09:42:29Z
dc.description.abstractIn all teleost fishes vitellogenesis is triggered and maintained by oestradiol-17 (E2) and is accompanied by an increase of blood plasma calcium and phosphate. The action of this hormone on calcium metabolism was investigated by treating fast-growing immature juvenile sea bream (Sparus aurata) with coconut butter implants alone (control) or implants containing 10 μg/g E2. Treatment with E2 induced the production of circulating vitellogenin, a 2·5-fold increase in plasma ionic Ca2+ and a 10-fold increase in plasma total calcium, largely bound to protein. In contrast to freshwater species, which obtain most of their calcium from the environment directly through the gills, the intestinal component of calcium uptake of the salt water-living sea bream represented up to 60–70% of the total uptake. The whole body calcium uptake, expressed as the sum of calcium obtained via intestinal and extra-intestinal (likely branchial) routes increased significantly in response to E2. Combined influx and unchanged efflux rates resulted in a significant 31% increase in net calcium uptake. There was no evidence for an effect of E2 on the calcium and phosphate content of the scales or the tartrate-resistant acid phosphatase activity (an index for bone/scale osteoclast activity). While most freshwater fish appear to rely on internal stores of calcium, i.e. bone and/or scales to increase calcium availability, the marine sea bream accommodates calcium-transporting mechanisms to obtain calcium from the environment and preserve internal stores. These observations suggest that a fundamental difference may exist in the E2-dependent calcium regulation between freshwater and marine teleosts.por
dc.identifier.citationGuerreiro, P. M.; Fuentes, J.; Canario, A. V. M.; Power, D. M. Calcium balance in sea bream (Sparus aurata): the effect of oestradiol-17 beta, Journal of Endocrinology, 173, 2, 377-385, 2002.por
dc.identifier.issn0022-0795
dc.identifier.otherAUT: ACA00258; DPO00386;
dc.identifier.urihttp://hdl.handle.net/10400.1/3924
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSociety for Endocrinologypor
dc.titleCalcium balance in sea bream (Sparus aurata): the effect of oestradiol-17 betapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage385por
oaire.citation.issue2por
oaire.citation.startPage377por
oaire.citation.titleJournal of Endocrinologypor
oaire.citation.volume173por
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
relation.isAuthorOfPublicationd0a8a148-98e7-4899-8fb0-0b8afa91e4a4
relation.isAuthorOfPublicationd354b937-b18c-4ca5-a843-04a04269d60f
relation.isAuthorOfPublication5f6e51ee-9113-469e-8b9e-f30f2d452521
relation.isAuthorOfPublicationc68f5ffb-63f6-4c70-8957-29e464fb59c0
relation.isAuthorOfPublication.latestForDiscoveryc68f5ffb-63f6-4c70-8957-29e464fb59c0

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Calcium balance in sea bream (Sparus aurata) The effect of oestradiol-17beta.pdf
Size:
118.26 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.61 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CCM2-Artigos (em revistas ou actas indexadas)