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dc.contributor.authorGivisiez, P. E. N.
dc.contributor.authorFurlan, R. L.
dc.contributor.authorMalheiros, E. B.
dc.contributor.authorMacari, Marcos [UNESP]
dc.date.accessioned2014-05-20T13:13:29Z
dc.date.available2014-05-20T13:13:29Z
dc.date.issued2003-06-01
dc.identifierhttp://dx.doi.org/10.4141/A02-038
dc.identifier.citationCanadian Journal of Animal Science. Ottawa: Agricultural Inst Canada, v. 83, n. 2, p. 213-220, 2003.
dc.identifier.issn0008-3984
dc.identifier.urihttp://hdl.handle.net/11449/1250
dc.description.abstractIncubation temperature (IT) was changed to evaluate if 6-wk-old birds become more tolerant to heat stress. After 13 d of incubation, 470 eggs were submitted to low (36.8degreesC), normal (37.8degreesC) and high (38.8degreesC) temperatures. At day 7 post-hatching, 144 birds were allocated to three rearing temperatures (48 birds/treatment): control/thermoneutral (35-24degreesC), high (33-30degreesC) or low (27-18degreesC) according to the age of the birds. Hsp70 levels in tissues of birds (1 d and 42 d), stress response (42 d) and performance were evaluated. High IT decreased brain (P < 0.01) and liver (P < 0.01) Hsp70 levels, whereas low IT decreased brain (P < 0.01) but increased heart (P < 0.01) Hsp70 levels in 1-d-old chicks. Birds incubated at a low temperature had higher (P < 0.05) feed intake (1-42d). High rearing temperature decreased feed intake (P<0.01) and liveweight (P<0.01). Colonic temperature was lower in birds incubated at a low temperature (P < 0.05) and higher in birds reared in a high temperature (P < 0.05) before heat stress. Birds reared in low temperature had higher increase in colonic temperature after heat stress (P < 0.05). Tissue Hsp70 levels were differently affected by rearing temperature, which affected broiler performance more than IT. Lower IT seemed to increase the sensitivity of birds to heat stress at market age.en
dc.format.extent213-220
dc.language.isoeng
dc.publisherAgricultural Inst Canada
dc.relation.ispartofCanadian Journal of Animal Science
dc.sourceWeb of Science
dc.subjectheat resistancept
dc.subjectHsp70pt
dc.subjectincubation temperaturept
dc.subjectrearing temperaturept
dc.titleIncubation and rearing temperature effects on Hsp70 levels and heat stress response in broilersen
dc.typeArtigo
dcterms.licensehttp://www.aic.ca/journals/instructions.cfm
dcterms.rightsHolderAgricultural Inst Canada
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationUNESP, Fac Ciências Agr & Vet, Dept Morfol & Fisiol Anim, Jaboticabal, SP, Brazil
dc.description.affiliationUNESP, Fac Ciências Agr & Vet, Dept Ciências Exatas, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUNESP, Fac Ciências Agr & Vet, Dept Morfol & Fisiol Anim, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUNESP, Fac Ciências Agr & Vet, Dept Ciências Exatas, Jaboticabal, SP, Brazil
dc.identifier.doi10.4141/A02-038
dc.identifier.wosWOS:000183644300005
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
dc.identifier.lattes4726596193949022
dc.identifier.lattes5713558572926669
dc.identifier.lattes0806409484159642
dc.identifier.orcid0000-0001-9549-0329
unesp.author.lattes4726596193949022
unesp.author.lattes5713558572926669
unesp.author.lattes0806409484159642[2]
unesp.author.orcid0000-0002-6850-7145[4]
unesp.author.orcid0000-0001-9549-0329[2]
dc.relation.ispartofjcr0.657
dc.relation.ispartofsjr0,403
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