Características do ejaculado de cordeiros com diferentes temperaturas retais sob condições de estresse térmico
Impactos do estresse térmico nas características do sêmen em carneiros com diferentes temperaturas retais
DOI:
https://doi.org/10.17533/udea.rccp.v38n2a7Palavras-chave:
carneiro, esperma, estresse térmico, motilidade, resistência, sêmen, testículoResumo
Antecedentes: o estresse térmico diminui a qualidade do sêmen em carneiros. Objetivo: avaliar as respostas produtivas e reprodutivas de carneiros e cordeiros com diferentes temperaturas retais sob condições de estresse térmico. Métodos: Os animais (n=12, cruzamento Dorper × Katadhin × Pelibuey, 235 a 730 dias de idade) foram distribuídos em um dos três grupos experimentais: cordeiros com baixa temperatura retal (RLLRT), cordeiros com alta temperatura retal (RLHRT) e carneiros. Resultados: as temperaturas retais foram maiores (p≤0,05) no grupo RLHRT do que no RLLRT, mas não foram encontradas diferenças (p>0,05) entre este e o grupo Carneros. O volume ejaculado e a concentração espermática foram maiores (p≤0,05) no grupo Ram do que nos grupos RLLRT e RLHRT. A motilidade da massa e a concentração espermática foram menores (p≤0,05) no grupo RLLRT do que nos grupos RLHRT e Carneros. O ganho de peso diário não foi diferente (p>0,05) entre os grupos RLLRT e RLHRT. Conclusão: a seleção de cordeiros com baixa temperatura retal sob condições de estresse térmico não beneficia o ganho de peso e as características da ejaculação.
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