Ejaculate traits of ram lambs with different rectal temperatures under heat stress conditions

Authors

DOI:

https://doi.org/10.17533/udea.rccp.v38n2a7

Keywords:

heat stress, motility, rams, resilience, ruminants, semen, sperm, testicle

Abstract

Background: Heat stress reduces semen quality in rams. Objective: To evaluate the productive and reproductive responses of rams and ram lambs with different rectal temperatures under heat stress conditions. Methods: The animals (n = 12, Dorper × Katadhin × Pelibuey crossbreed, aged 235 to 730 days) were assigned to one of three experimental groups: ram lambs with low rectal temperature (RLLRT), ram lambs with high rectal temperature (RLHRT), and Rams. Results: Afternoon rectal temperatures were higher (p ≤ 0.05) in the RLHRT group, and there was no difference (p > 0.05) between the Rams and RLHRT groups. Ejaculate volume and sperm concentration were higher (p ≤ 0.05) in the Rams group than in the RLLRT and RLHRT groups. Mass motility and sperm concentration were lower (p ≤ 0.05) in the RLLRT group than in the RLHRT and Rams groups. Average daily weight gain did not differ (p > 0.05) between the RLLRT and RLHRT groups. Conclusion: The selection of ram lambs with low rectal temperature under heat stress conditions did not provide any benefit in terms of average daily weight gain or ejaculate traits.

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Author Biographies

Jorge-Humberto McCormick-Palacios, Universidad Autónoma de Baja California

Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León, 21705, Mexicali, México

Gustavo Ramírez-Valverde, Colegio de postgraduados

Colegio de Postgraduados. Departamento de Estadística, Montecillo, 56230, Texcoco, México

Canuto Muñoz-García, Universidad Autónoma de Guerrero

Facultad de Medicina y Veterinaria No. 1, Universidad Autónoma de Guerrero, Altamirano, 40660, Guerrero, México

Jorge-Alonso Maldonado-Jáquez, Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias

Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias. Campo Experimental la Laguna, Matamoros, 27440, Cohahuila, México

Saúl Hernández-Aquino, Universidad Autónoma de Baja California

Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León, 21705, Mexicali, México

Rodrigo Flores-Garivay, Universidad Autónoma de Baja California

Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León, 21705, Mexicali, México

Reyna-Lucero Camacho-Morales, Universidad Autónoma de Baja California

Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León, 21705, Mexicali, México

Ernesto Avelar-Lozano , Universidad Autónoma de Baja California

Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León, 21705, Mexicali, México

Juan González-Maldonado, Universidad Autonoma de Baja California

Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León, 21705, Mexicali, México

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Published

2024-12-06

How to Cite

McCormick Palacios , J. H., Ramírez-Valverde, G., Muñoz-García, C., Maldonado Jáquez , J. A., Hernández Aquino, S., Flores Garivay, R., Camacho Morales , R. L., Avelar Lozano , E., & González Maldonado, J. (2024). Ejaculate traits of ram lambs with different rectal temperatures under heat stress conditions. Revista Colombiana De Ciencias Pecuarias, 38(2), e3827. https://doi.org/10.17533/udea.rccp.v38n2a7

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Original research articles