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Sexual performance and semen quality of pubertal lambs treated with different weaning methods.
Ledezma-Torres, Rogelio Alejandro; Sánchez-Dávila, Fernando; Rodríguez-Miranda, Diana Aimé; Luna-Palomera, Carlos; Grizelj, Juraj; Vázquez-Armijo, José Fernando; López-Villalobos, Nicolás.
Afiliação
  • Ledezma-Torres RA; Universidad Autónoma de Nuevo León, Facultad de Medicina Veterinaria y Zootecnia, Posgrado Conjunto FA-FMVZ, General Escobedo, CP 66050, Mexico.
  • Sánchez-Dávila F; Universidad Autónoma de Nuevo León, Facultad de Agronomía, Posgrado Conjunto FA-FMVZ, Laboratorio de Reproducción Animal, Unidad Académica Marín, Marín, CP 66700, Mexico.
  • Rodríguez-Miranda DA; Universidad Autónoma de Nuevo León, Posgrado Conjunto FA-FMVZ, General Escobedo, CP 66050, Mexico.
  • Luna-Palomera C; Universidad Juárez Autónoma de Tabasco, División Académica de Ciencias Agropecuarias, Villahermosa, Tabasco, CP 86280, México.
  • Grizelj J; Universidad de Zagreb, Facultad de Medicina Veterinaria, Zagreb, Croatia.
  • Vázquez-Armijo JF; Universidad Autónoma del Estado de México, Centro Universitario Temascaltepec, Temascaltepec, CP 51300, Mexico.
  • López-Villalobos N; Universidad Autónoma del Estado de México, Centro Universitario Temascaltepec, Temascaltepec, CP 51300, Mexico.
Arch Anim Breed ; 65(3): 259-265, 2022.
Article em En | MEDLINE | ID: mdl-36035875
The objective of this study was to determine the effect of the weaning method on lamb stress, body weight, sexual behavior, and semen quality of Saint Croix male lambs. The present study was carried out during the late spring and summer of 2018 in the northeast of Mexico. Sixty male lambs born as twins or triplets (3.2  ±  0.6 kg birth weight) and weaned at 60 d of age (19.21  ±  1.8 kg weaning weight) were divided into two weaning methods: complete separation from the dams (CS; the lambs were moved to a pen that was at 500 m of distance from the dams) and separation with contact from the dams (SCD); the lambs were physically separated by a steel mesh that prevented the lambs from having the possibility of sucking milk from their mothers, but they maintained permanent visual and auditory contact. Cortisol levels were determined 3 d before and 7 d after weaning. Lambs were evaluated as 3-month-old lambs for sexual behavior and semen quality for 9 weeks. The effects of the weaning method (M), week (W), and the interaction M  × â€¯W were significant on body weight and cortisol levels ( P < 0.001 ). The SCD lambs had higher cortisol levels at 3, 5, and 7 d after weaning than CS lambs ( P < 0.001 ). The CS lambs had higher body weight during the first 4 weeks after weaning than SCD lambs ( P < 0.001 ). The weaning method had no effect on scrotal circumference, sexual behavior, and semen quality traits, except for progressive sperm motility, being better for the lambs that were completely separated ( P < 0.05 ). The results from this study show that complete separation of lambs and ewes at weaning is an effective method to reduce lamb stress and improve lamb growth after weaning, but it did not have long-term effects on sexual behavior and semen quality of Saint Croix male lambs.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Arch Anim Breed Ano de publicação: 2022 Tipo de documento: Article País de afiliação: México País de publicação: Alemanha

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Arch Anim Breed Ano de publicação: 2022 Tipo de documento: Article País de afiliação: México País de publicação: Alemanha