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| TOURNADRE, H.; PELLICER, M.; BOCQUIER, F.. |
| The ram effect, which is a natural method for the control of reproduction in sheep, is an alternative to hormone treatments that are banned on organic farms. The ram effect induces a combination of ovulation and oestrus in ewes that is acyclic and conducive to artificial insemination. The proportion of acyclic females with induced ovulation and their subsequent fertility at the first oestrus is variable. The control of some breeding factors that have been studied here may help to reduce this variability. The proportion of ewes induced to ovulate by rams increased as the season advanced (54% in April vs. 84% at the end of May, p<0.05) and with a longer time period between drying-off and mating: from 29% to 84% (p<0.001) for 22 and 86 days elapsed,... |
| Tipo: Journal paper |
Palavras-chave: Sheep and goats. |
| Ano: 2009 |
URL: http://orgprints.org/15453/1/14%2DTournadre.pdf |
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