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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
22/08/2017 |
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Data da última atualização: |
09/01/2025 |
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Autoria: |
LEITE, J. H. G. M.; FAÇANHA, D. A. E.; COSTA, W. P.; CHAVES, D. F.; GUILHERMINO, M. M.; SILVA, W. S. T.; BERMEJO, L. A. |
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Afiliação: |
JACINARA HODY GURGEL MORAIS LEITE, UNIVERSIDADE FEDERAL RURAL DO SEMIÁRIDO; DÉBORA ANDRÉA EVANGELISTA FAÇANHA, STATE UNIVERSITY OF CEARÁ; WIRTON PEIXOTO COSTA, UNIVERSIDADE FEDERAL RURAL DO SEMIÁRIDO; DOWGLISH FERREIRA CHAVES, STATE UNIVERSITY OF CEARA; MAGDA MARIA GUILHERMINO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; WALLACE SOSTENE TAVARES SILVA, NIVERSIDADE FEDERAL RURAL DO SEMIÁRIDO; LUIS ALBERTO BERMEJO, UNIVERSIDAD DE LA LAGUNA. |
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Título: |
Thermoregulatory responses related to coat traits of Brazilian native ewes: an adaptive approach. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Journal of Applied Animal Research, v. 46, n. 2, p. 353–359, 2018. |
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DOI: |
http://dx.doi.org/10.1080/09712119.2017.1302877 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Semi-arid conditions can adversely affect livestock productivity and change certain physiological parameters. The relationship between hair coat and thyroxine levels in Morada Nova ewes was evaluated through environmental factors, such as air temperature, relative air humidity, radiant and Black Globe Humidity Index to gain a better understanding of thermoregulation mechanisms in these animals. Measurements were taken from July to January in 383 Morada Nova ewes. The variables studied included rectal temperature (RT), respiratory rate (RR), coat thickness (CT), hair length (HL), hair diameter (HD), hair density (D) and thyroid hormones. The data underwent multivariate statistical analyses and a significant inverse relationship was found between coat traits and Thyroxine (T4). The animals that exhibited greater HL, coat density and CT showed lower T4 concentrations. Coat traits showed a strong interaction with physiological mechanisms and can be considered relevant in maintaining homeostasis. Hair traits play an important role in this process, since T4 reduction was stronger in animals that showed difficulties in eliminating heat, which were the ones that had greater HL, hair density and HD. By contrast, animals with a hair coat more favourable to heat losses had higher levels of thyroid hormones. |
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Palavras-Chave: |
Natural environmental conditions; Semi-arid environment; Semiarid region. |
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Thesagro: |
Ovino; Recurso Genético; Termorregulação. |
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Thesaurus Nal: |
Animal adaptation; Animal genetic resources; Brazil; Ewes; Multivariate analysis; Sheep; Thermoregulation; Thyroid hormones. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
