Progesterone and betahydroxybutyrate in line measurements for a better description and understanding of Holstein cows fertility in field conditions
| Autor: | Claire Saby, Wenting Zhang, René Fournier, Rémi Servien, Nathalie Villa-Vialaneix, Fabien Corbiere, Sylvie Chastant-Maillard |
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| Přispěvatelé: | Interactions hôtes-agents pathogènes [Toulouse] (IHAP), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Ecole Nationale Vétérinaire de Toulouse (ENVT), ToxAlim (ToxAlim), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA), Unité de Mathématiques et Informatique Appliquées de Toulouse (MIAT INRA), Institut National de la Recherche Agronomique (INRA) |
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| Zdroj: | Scopus-Elsevier 8th European Conference on Precision Livestock Farming (EC-PLF) 8th European Conference on Precision Livestock Farming (EC-PLF), Sep 2017, Nantes, France. 7 p HAL |
| Popis: | PLF devices allow to follow up large populations of animals in a non-invasive way over long periods of time and under field conditions. The objective of this work was to describe the ovarian activity and metabolic status during the postpartum period in dairy cows and their impact on further fertility in commercial herds. Data from 760 cows housed in 21 French farms were collected over the first 140 days postpartum (dpp). Milk progesterone was assayed on average every 2.7 days from 20 to 140 dpp whereas BHB was assayed every 3- 4 days during the first 21 dpp. Date and success of artificial insemination (AI) were recorded. Overall, 22.9% (174/760) cows resumed cyclicity (progesterone > 5 ng/ml) after 45 dpp (prolonged anovulatory interval postpartum), ovulation was delayed (follicular phase > 14 days) in 27.9% (212/760), luteolysis was delayed (a luteal phase > 20 days) for 26.1% of the cows (199/760) whereas 34.3% (261/760) suffered from an early luteolysis (a short luteal phase < 10 days). A total of 74.3% (565/760) cows showed at least one atypical pattern of cyclicity. The prevalence of biochemical ketosis (BHB> 0.15 mmol/L) is higher in cows with at least one cyclicity abnormality (p-value=0.02). In cows without any atypical pattern, a shortening in calving to first insemination interval (83.2 dpp vs 97.1 dpp; p-value |
| Databáze: | OpenAIRE |
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