Respuesta reproductiva, metabólica y cambios corporales en ovejas alimentadas con dos niveles de energía

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Héctor Maximino Rodríguez-Magadán
Jorge Hernández-Bautista
Said Cadena-Villegas
Teodulo Salinas-Rios
Edmundo Atxayacatl Silva-Rodríguez
Honorio Torres-Aguilar
Eliseo Sosa-Montes
Resumen

Objetivo. Evaluar la respuesta reproductiva, estado metabólico y cambios corporales en ovejas Dorper y Katahdin suplementadas con dos niveles de energía previo al empadre. Materiales y métodos. Se utilizaron 14 hembras Katahdin y 13 Dorper distribuidas en 2 tratamientos a las cuales se les sincronizó el celo. Catorce días previo a la sincronización de estros, las ovejas se distribuyeron en 2 tratamientos de acuerdo con el nivel de energía en la dieta, T1:2.0 y T2:2.5 Mcal kg-1 de EM. La alimentación abarcó 14 días de adaptación y 14 de alimentación con dieta integral. Al inicio y al final del estudio se midió el espesor de grasa dorsal, área del ojo de la costilla, peso corporal y concentraciones de glucosa e insulina. Se midieron los principales parámetros reproductivos como respuesta a estro, porcentaje de gestación y prolificidad. Se realizaron análisis de varianza y pruebas de ji cuadrada para determinar el efecto del nivel de energía y el genotipo. Resultados. El genotipo y el nivel de energía no afectaron ninguna de las variables medidas, aunque se encontró que con ambos niveles de energía existió un incremento en las concentraciones de glucosa, así como una ganancia en peso, grasa corporal y área del ojo de la costilla. Conclusiones. Debido a que no existió diferencia en los parámetros reproductivos y cambios corporales en ovejas al alimentarlas con los dos niveles de energía, es mejor la alimentación con 2.0 Mcal kg-1 de EM, ya que reduce costos de alimentación.

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Biografía del autor/a / Ver

Héctor Maximino Rodríguez-Magadán, Universidad Autónoma Benito Juárez de Oaxaca. Oaxaca, México.

Universidad Autónoma Benito Juárez de Oaxaca, Facultad de Medicina Veterinaria y Zootecnia. Oaxaca, México.

Jorge Hernández-Bautista, Universidad Autónoma Benito Juárez de Oaxaca. Oaxaca, México.

Universidad Autónoma Benito Juárez de Oaxaca, Facultad de Medicina Veterinaria y Zootecnia. Oaxaca, México.

Said Cadena-Villegas, Colegio de Postgraduados. Tabasco, México.

Colegio de Postgraduados, Campus Tabasco; Periférico Carlos A. Molina. Tabasco, México.

Teodulo Salinas-Rios, Universidad Autónoma Benito Juárez de Oaxaca. Oaxaca, México.

Universidad Autónoma Benito Juárez de Oaxaca. Oaxaca, México.

Edmundo Atxayacatl Silva-Rodríguez, Universidad Autónoma Benito Juárez de Oaxaca. Oaxaca, México.

Universidad Autónoma Benito Juárez de Oaxaca, Facultad de Medicina Veterinaria y Zootecnia. Oaxaca, México.

Honorio Torres-Aguilar, Universidad Autónoma Benito Juárez de Oaxaca. Oaxaca, México.

Universidad Autónoma Benito Juárez de Oaxaca, Facultad de Ciencias Químicas. Oaxaca, México.

Eliseo Sosa-Montes, Universidad Autónoma Chapingo, Estado de México, México.

Universidad Autónoma Chapingo, Departamento de Zootecnia. Texcoco, Estado de México, México. 

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