Bio-thermal responses and heat balance of a hair coat sheep breed raised under an equatorial semi-arid environment

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorKing Saud Univ-
Autor(es): dc.contributorUniv Witwatersrand-
Autor(es): dc.contributorUniv Fed Paraiba-
Autor(es): dc.creatorCarvalho Fonseca, Vinicius de Franca [UNESP]-
Autor(es): dc.creatorCampos Maia, Alex Sandro [UNESP]-
Autor(es): dc.creatorSaraiva, Edilson Paes-
Autor(es): dc.creatorMelo Costa, Cintia Carol de [UNESP]-
Autor(es): dc.creatorSilva, Roberto Gomes da [UNESP]-
Autor(es): dc.creatorAbdoun, Khalid Ahmed-
Autor(es): dc.creatorAl-Haidary, Ahmed Abrahim-
Autor(es): dc.creatorSamara, Emad Mohammed-
Autor(es): dc.creatorFuller, Andrea-
Data de aceite: dc.date.accessioned2022-02-22T00:04:05Z-
Data de disponibilização: dc.date.available2022-02-22T00:04:05Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2019-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jtherbio.2019.05.024-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/194844-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/194844-
Descrição: dc.descriptionLong-term assessments of bio-thermal responses in a hair coat sheep breed were performed to investigate the effect of the thermal environment on their physiological performance and thermal balance. Twelve healthy non-lactating Morada Nova ewes (3 +/- 1.2 years old, body mass 32.7 +/- 3.7 kg) were assigned in two 12 x 12 Latin square designs (from 07:00 to 19:00 h and from 19:00 to 07:00 h, respectively) for assessments of their biothermal responses during 24 consecutive days. There was a monophasic pattern in the ambient temperature (T-A), which ranged between 21 and 38 degrees C, thereby exposing the ewes to different levels of surrounding T-A over the day and influencing several of their bio-thermal responses (P = 0.0001). Their body temperatures (i.e., rectal, skin, and hair coat surface temperatures) gradually increased (P = 0.0001) from 04:00 h. The mean peak for rectal temperature (39.3 degrees C) was recorded at 19:00 h, while for skin and hair coat surface temperatures it occurred at 13:00 and 14:00 h, respectively. The sensible heat loss by long wave radiation and surface convection exceeded the metabolism of ewes when the T-A was below 24 degrees C, which usually occurred between 24:00 and 06:00 h. During exposure to higher ambient temperatures, the sheep increased respiratory evaporative heat loss, without panting. In conclusion, the sheep regulated rectal temperature within a relatively narrow range of 1.4 degrees C over 24 h, and appear to be well adapted to coping with heat. Minimum 24 h body temperature was correlated with minimum T-A, indicating that heat conservation strategies are likely to be important for Morada Nova sheep in a tropical biotype at night, when rates of sensible heat loss exceed the heat generated by metabolism.-
Descrição: dc.descriptionDeanship of Scientific Research at King Saud University-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionSao Paulo State Univ, Biometorol Lab, Innovat Grp Biometeorol Behav & Anim Welf INOBIO, Jaboticabal, Brazil-
Descrição: dc.descriptionKing Saud Univ, Dept Anim Prod, Riyadh, Saudi Arabia-
Descrição: dc.descriptionUniv Witwatersrand, Sch Physiol, Brain Funct Res Grp, Johannesburg, South Africa-
Descrição: dc.descriptionUniv Fed Paraiba, Anim Biometeorol & Ethol Grp BIOET, Areia, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Biometorol Lab, Innovat Grp Biometeorol Behav & Anim Welf INOBIO, Jaboticabal, Brazil-
Descrição: dc.descriptionDeanship of Scientific Research at King Saud University: RGP-VPP-171-
Descrição: dc.descriptionFAPESP: 2011/17388-6-
Formato: dc.format83-91-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationJournal Of Thermal Biology-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectMorada nova sheep-
Palavras-chave: dc.subjectBody temperature-
Palavras-chave: dc.subjectMetabolism-
Palavras-chave: dc.subjectNycthemeral cycle-
Palavras-chave: dc.subjectSensible heat loss-
Palavras-chave: dc.subjectAdaptation-
Título: dc.titleBio-thermal responses and heat balance of a hair coat sheep breed raised under an equatorial semi-arid environment-
Tipo de arquivo: dc.typelivro digital-
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