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Un partenariat technique avec les éleveurs de brebis laitières dans les Pyrénées Atlantiques pour adapter les pratiques et réussir l’insémination animale

Abstract : Dairy sheep breeders in the Pyrénées Atlantiques participate in sustaining traditional mountain agropastoral systems, based on transhumance and cheese-making on farms (with unpasteurized milk, Ossau Iraty-type) and even on mountain pastures. Reproduction performances have, however, deteriorated over the last decade and a decrease in fertility after Artificial Insemination (AI) can quickly beco me dangerous for the functionality of the selection scheme.This study was led in 2012 in partnership between the CDEO and 70 breeders to assess factors affecting fertility after AI (early pregnancy rate 28 days after AI, lambing rate). Surveys and measures were realized on the farm, at the herd scale and at the individual scale (n=9415 ewes): ewe traits, response to hormonal treatment and AI conditions, rearing conditions (particularly feeding), dairy production monitoring, body condition score and health events. The factors of variation identified confirmed the importance of the selection of the ewes to be inseminated: reproduction method of the previous year, fertility after AI during reproductive life, age, feeding and body condition around the time of the AI. Even if factors such as the practice of transhumance or the conditions of AI did not appear as limiting factors for fertility, in very restrained systems, the most fragile ewes can "drop out” (young, high-producing...). All breeders have to reconstruct a new technical consistency, to find a new balance between milk / cheese production, reproduction and feeding system. At a more collective level, the same power of selection has to be maintained in local and hardy breeds with only a small population. At the end of the study, every breeder received a synthetic card adapted to his farm with technical clues and possible areas to work on.
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https://hal.inrae.fr/hal-02744149
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Submitted on : Wednesday, June 3, 2020 - 7:05:46 AM
Last modification on : Thursday, August 5, 2021 - 3:49:57 AM

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  • HAL Id : hal-02744149, version 1
  • PRODINRA : 340697

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F. Fidelle, J.M. Arranz, F. Landagaray, O. Sallato, H.I. Mendez, et al.. Un partenariat technique avec les éleveurs de brebis laitières dans les Pyrénées Atlantiques pour adapter les pratiques et réussir l’insémination animale. 22. Rencontres autour des Recherches sur les Ruminants, Institut de l'Elevage (IDELE). FRA. Institut National de la Recherche Agronomique (INRA)., Dec 2015, Paris, France. ⟨hal-02744149⟩

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