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Avaliação das respostas fisiológicas de bezerros Zebuínos puros e cruzados nascidos em clima subtropical

dc.contributor.authorRibeiro, Andréa Roberto Bueno
dc.contributor.authorDe Alencar, Maurício Mello
dc.contributor.authorNegrão, João Alberto
dc.contributor.authorDa Costa, Mateus José Rodrigues Paranhos [UNESP]
dc.contributor.authorStarling, Josiane Maria Cardoso
dc.contributor.institutionUniversidade do Grande ABC (UniABC)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCurso de Medicina Veterinária da Universidade de Franca (UNIFRAN)
dc.date.accessioned2014-05-27T11:21:59Z
dc.date.available2014-05-27T11:21:59Z
dc.date.issued2006-09-28
dc.description.abstractThe influence of environmental parameters on the physiological responses of purebred and crossbred Nellore calves born in a subtropical region was studied. All calves were born from high grade Nellore cows sired by Aberdeen Angus (AN), Simmental (SN), Canchim (CN) and Nellore (NI) bulls. These calves were raised under intensive management and another group of Nellore calves (NR) was raised under extensive management, similar to the typical brazilian system for beef production. Calves were observed from birth until the end of the first suckling, and the variable first suckling latency (LM) was estimated. Aapproximately 24 hours after birth, blood samples were collected from each calf to measure the plasma concentrations of total protein (PT), glucose (Gli), triiodothyronin (T 3), thyroxin (T 4), T 3:T 4 ratio, cortisol (Cort) and immunoglobulin-G (IgGb). At the same time, the calves' rectal temperature was taken and the cows and the calves were weighed. Climatic data of temperature (Temp), relative humidity (UR) and rain precipitation (PRE) in the birth day were also recorded. Physiological parameters were analyzed by least squares method using a model that included the effects of year and month of calving, group of calf, sex of calf, cow category, calving time, year x group and year x month of birth interactions and the covariables calf's weight, PRE, Temp, UR and LM. The effect of Temp was significant for the concentrations of T 3, T 4, T 4:T 3 and Cort. The concentrations of T 3 and Cort decreased and the levels of T 4 and T 4:T 3 ratio increased as Temp increased. Similarly, the concentration of Cort increased and the concentrations of IgGb and PT decreased as LM increased. PT level was significantly higher in NR calves than in NI ones. © 2006 Sociedade Brasileira de Zootecnia.en
dc.description.affiliationUniversidade do Grande ABC - UniABC, Santo André - SP
dc.description.affiliationEmbrapa Pecuária Sudeste, São Carlos - SP
dc.description.affiliationCnpq
dc.description.affiliationFaculdade de Zootecnia e Engenharia de Alimentos - FZEA/USP, Pirassununga - SP
dc.description.affiliationFaculdade de Ciências Agrárias e Veterinárias - FCAV/UNESP, Jaboticabal - SP
dc.description.affiliationCNPq
dc.description.affiliationCurso de Medicina Veterinária da Universidade de Franca - UNIFRAN, Franca - SP
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias - FCAV/UNESP, Jaboticabal - SP
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1146-1153
dc.identifierhttp://dx.doi.org/10.1590/S1516-35982006000400028
dc.identifier.citationRevista Brasileira de Zootecnia, v. 35, n. 3 SUPPL., p. 1146-1153, 2006.
dc.identifier.doi10.1590/S1516-35982006000400028
dc.identifier.file2-s2.0-33748938737.pdf
dc.identifier.issn1516-3598
dc.identifier.scieloS1516-35982006000400028
dc.identifier.scopus2-s2.0-33748938737
dc.identifier.urihttp://hdl.handle.net/11449/69115
dc.identifier.wosWOS:000239822000028
dc.language.isopor
dc.relation.ispartofRevista Brasileira de Zootecnia
dc.relation.ispartofsjr0,337
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBehavior
dc.subjectBirth
dc.subjectEnvironment
dc.subjectPhysiological parameters
dc.subjectBos indicus
dc.titleAvaliação das respostas fisiológicas de bezerros Zebuínos puros e cruzados nascidos em clima subtropicalpt
dc.title.alternativeEvaluation of physiological responses of straightbred and crossbred Zebu calves born in a subtropical environmenten
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/rbz/paboutj.htm#003
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentZootecnia - FCAVpt

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