Circadian and circannual rhythms of T3 and T4 secretions in Polwarth-Ideal rams

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dc.contributor.authorSouza, MIL
dc.contributor.authorBicudo, Sony Dimas [UNESP]
dc.contributor.authorUribe-Velasquez, L. F.
dc.contributor.authorRamos, Alcides Amorim [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-02-26T17:14:28Z
dc.date.accessioned2014-05-20T13:41:40Z
dc.date.available2014-02-26T17:14:28Z
dc.date.available2014-05-20T13:41:40Z
dc.date.issued2002-10-01
dc.description.abstractPlasma concentrations of triiodothyronine (T-3) and thyroxine (T-4) in five adult Polwarth-ldeal rams located at latitude 22degrees51 'S and longitude 48degrees26'W were evaluated every 2 months for 1 year (June, August, October, December, February, April). Blood collections were made at 2 h intervals for 24 h in each month, and hormone determinations were by radioimmunoassay. Means of T-3 (97.52 +/- 21.45 ng/dL) and T-4 (4.30 +/- 0.94 mug/dL) varied in peaks throughout the 24 h period with the highest concentrations occurring in the afternoon (16:30 and 14:30 h, respectively), and throughout the year where the highest levels were during months of long daylengths (October, December, February). Results suggest circadian and circannual rhythms in thyroid hormone secretion may be present in rams kept relatively close to the equator. (C) 2002 Published by Elsevier B.V. B.V.en
dc.description.affiliationUniv Estadual Paulista Julio Mesquita Filho, FMVZ, Dept Anim Reprod & Vet Radiol, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Julio Mesquita Filho, FMVZ, Dept Anim Reprod & Vet Radiol, BR-18618000 Botucatu, SP, Brazil
dc.format.extent1-5
dc.identifierhttp://dx.doi.org/10.1016/S0921-4488(02)00103-7
dc.identifier.citationSmall Ruminant Research. Amsterdam: Elsevier B.V., v. 46, n. 1, p. 1-5, 2002.
dc.identifier.doi10.1016/S0921-4488(02)00103-7
dc.identifier.issn0921-4488
dc.identifier.lattes8134606270913860
dc.identifier.urihttp://hdl.handle.net/11449/14444
dc.identifier.wosWOS:000178601900001
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSmall Ruminant Research
dc.relation.ispartofjcr0.974
dc.relation.ispartofsjr0,485
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectovinept
dc.subjectthyroid hormonespt
dc.subjectseasonalitypt
dc.titleCircadian and circannual rhythms of T3 and T4 secretions in Polwarth-Ideal ramsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes8134606270913860
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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