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Reproductive behavior in hair sheep rams under tropical conditions.
Aké-Villanueva, Jesús Ricardo; Aké-López, Jesús Ricardo; Magaña-Monforte, Juan Gabriel; Segura-Correa, José Candelario.
Afiliação
  • Aké-Villanueva JR; Departamento de Reproducción Animal y Mejoramiento Genético, FMVZ-CCBA - Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico.
  • Aké-López JR; Departamento de Reproducción Animal y Mejoramiento Genético, FMVZ-CCBA - Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico.
  • Magaña-Monforte JG; Departamento de Reproducción Animal y Mejoramiento Genético, FMVZ-CCBA - Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico.
  • Segura-Correa JC; Departamento de Reproducción Animal y Mejoramiento Genético, FMVZ-CCBA - Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico. jose.segura@correo.uady.mx.
Trop Anim Health Prod ; 51(6): 1627-1635, 2019 Jul.
Article em En | MEDLINE | ID: mdl-30806954
The reproductive efficiency of sheep herds depends to a great extent on the ram. Male reproductive evaluation allows to select for the best and eliminate those with reproductive problems. The objective was to evaluate the effect of breed and age group on the reproductive behavior of hair sheep rams in the tropics of Mexico. Pelibuey (n = 42), Blackbelly (n = 30), Dorper (n = 44), and Katahdin (n = 30) rams of two age groups: young (n = 74, 1-1.5 years old) and adult (n = 72, 2-4 years old) were evaluated. Serving capacity (10-min duration) and breeding soundness evaluation (BSE) tests were carried out in each ram. In the first test, rams were classified as suitable and unsuitable, and in the BSE test, they were classified as satisfactory, questionable, or unsatisfactory. The response variables were analyzed using chi-square test or analyses of variance (ANOVA). ANOVA included the fixed effects of breed, age group, and their interaction. In the serving capacity test, 79.5% of the rams were considered suitable, with no breed differences (P > 0.05). Adult rams (90.3%) had the highest proportion of suitable rams (P < 0.05). In the BSE test, 80.2% of the rams were satisfactory; only breed being significant (P < 0.05). Pelibuey breed had the highest proportion of satisfactory rams (91.4%). Breed × age interaction was no significant for any trait. After serving capacity and BSE tests, a high proportion of rams was found not suitable for reproduction (36.3%), which is expected to cause low fertility in the flock.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Sexual Animal / Clima Tropical / Ovinos Limite: Animals País/Região como assunto: Mexico Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2019 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Sexual Animal / Clima Tropical / Ovinos Limite: Animals País/Região como assunto: Mexico Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2019 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos