Factors influencing the short term ovarian response of milking Lacaune ewes to the male effect - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Papers Year : 2021

Factors influencing the short term ovarian response of milking Lacaune ewes to the male effect

Abstract

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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Dates and versions

hal-03376369 , version 1 (13-10-2021)

Identifiers

  • HAL Id : hal-03376369 , version 1

Cite

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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