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Mass sperm motility is associated with fertility in sheep

David, Ingrid and Kohnke, Philippa L. and Lagriffoul, Gilles and Praud, Olivier and Plouraboué, Franck and Degond, Pierre and Druart, Xavier Mass sperm motility is associated with fertility in sheep. (2015) Animal Reproduction Science, 161. 75-81. ISSN 0378-4320

(Document in English)

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Official URL: https://doi.org/10.1016/j.anireprosci.2015.08.006


The study was to focus on the relationship between wave motion (mass sperm motility, measured by a mass sperm motility score, manually assessed by artificial insemination (AI) center operators) and fertility in male sheep. A dataset of 711,562 artificial inseminations performed in seven breeds by five French AI centers during the 2001–2005 time period was used for the analysis. Factors influencing the outcome of the insemination, which is a binary response observed at lambing of either success (1) or failure (0), were studied using a joint model within each breed and AI center (eight separate analyses). The joint model is a multivariate model where all information related to the female, the male and the insemination process were included to improve the estimation of the factor effects. Results were consistent for all analyses. The male factors affecting AI results were the age of the ram and the mass motility. After correction for the other factors of variation, the lambing rate increased quasi linearly from three to more than ten points with the mass sperm motility score depending on the breed and the AI center. The consistency of the relationship for all breeds indicated that mass sperm motility is predictive of the fertility resulting when sperm are used from a specific ejaculate. Nonetheless, predictability could be improved if an objective measurement of mass sperm motility were available as a substitute for the subjective scoring currently in use in AI centers.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Elsevier website : http://www.sciencedirect.com/science/article/pii/S0378432015300014
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole Nationale Vétérinaire de Toulouse - ENVT (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Institut de l’Elevage - IDELE (FRANCE)
Other partners > Institut Français du Cheval et de l'Equitation - IFCE (FRANCE)
Other partners > Imperial College London (UNITED KINGDOM)
Other partners > Université de Tours (FRANCE)
Laboratory name:
Agence Nationale pourla Recherche (ANR) - National Science Foundation (NSF) - Engineering andPhysical Sciences Research Council (EPSRC) - Royal Society - Wolfson foundation
Deposited On:10 Sep 2015 13:47

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