Características del eyaculado de corderos con diferente temperatura rectal bajo condicione de estrés calórico
Impactos del estrés calórico en el semen de carneros con diferente temperatura rectal
DOI:
https://doi.org/10.17533/udea.rccp.v38n2a7Palabras clave:
espermatozoide, estrés calórico, macho cabrío, motilidad, resistencia, semen, testículoResumen
Antecendentes: el estrés calorico disminuye la calidad del semen en carneros. Objetivo: evaluar las respuestas productivas y reproductivas de carneros y corderos con diferente temperatura rectal bajo condicones de estrés calórico. Metodos: los animales (n=12, cruza de Dorper × Katadhin × Pelibuey, con 235 a 730 días de edad) fueron asignados a uno de tres grupos experimentales: corderos con temperatura rectal baja (RLLRT), corderos con temperatura rectal alta (RLHRT), y Carneros. Resultados: las temperaturas rectales fueron mayores (p≤0.05) en el grupo RLHRT que en el RLLRT, pero no se encontraron diferencias (p>0.05) entre este y el grupo de Carneros. El volumen del eyaculado y la concentración espermatica fueron mayores (p≤0.05) en el grupo de Carneros que en los grupos RLLRT y RLHRT. La motilidad masal y la concentración espermatica fueron menores (p≤0.05) en el grupo RLLRT que en los grupos RLHRT y Carneros. La ganancia diaria de peso no fue diferente (p>0.05) entre los grupos RLLRT y RLHRT. Conclusión: la selección de corderos con temperatura rectal baja en condiciones de estrés calórico no beneficia su ganancia de peso y las caracteristicas del eyaculado.
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