Seasonal patterns of semen production and sperm quality from rams of different breeds have been previously reported (Colas, 1979). Flocks within a breed have been selected for differences in seasonal lambing patterns based on ewe lambing date (Smith, et al.,1992). This trial reports the effects of this selection on the production and quality of semen from rams in those flocks.
Proceedings of the New Zealand Society of Animal Production, Volume 57, , 259, 1997
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