Factors influencing the short term ovarian response of milking Lacaune ewes to the male effect
Résumé
During a 5-year longitudinal study, we assessed the main factors impacting the short-term ovarian response of ewes to the male effect (ME) in a commercial organic dairy sheep farm. Each year the cyclicity before ME and the ovarian response following ME was monitored within a flock varying from 228 to 269 adult Lacaune dairy ewes. Mature rams (from 3 to 12 each year), equipped with an apron that prevented mating, were introduced at D0 (day of the ME) for 14 days. Blood samples were collected at D-10, D0 and D+11 to measure plasma progesterone concentrations and determine the occurrence of cyclicity before the ME as well as the proportion of ewes responding to the ME. We collected for each ewe five continuous and two categorical explanatory variables: age, lambing to ME (LME) interval,
total milk production, third milk control, last litter size and body condition score (BCS). The BCS was classified into three categories: High (BCS>3), Medium (2
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Sciences du Vivant [q-bio]Christelle Raynaud : Connectez-vous pour contacter le contributeur
https://hal.inrae.fr/hal-03376369
Soumis le : mercredi 13 octobre 2021-14:20:27
Dernière modification le : mercredi 13 décembre 2023-10:14:07
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- HAL Id : hal-03376369 , version 1
Citer
Nathalie Debus, Ellen Laclef, Amandine Lurette, Moutaz Alhamada, Anne Tesniere, et al.. Factors influencing the short term ovarian response of milking Lacaune ewes to the male effect. 72nd Annual Meeting of the European Federation of Animal Science, Aug 2021, Davos, Switzerland. ⟨hal-03376369⟩
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