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Controlled mating. Evaluation of some production and reproduction traits at different seasons of the year (spring, summer, autumn and winter)


1er Congreso Nacional de Produccion Ovina, Mexico, 1988: 136-139
Controlled mating. Evaluation of some production and reproduction traits at different seasons of the year (spring, summer, autumn and winter)
Data on approx. 100 criollo ewes mated with Suffolk, Rambouillet or Corriedale rams, were analysed. Ewes mated in winter had the lowest CR and "absolute prolificacy" (4% and 3% resp.), and those mated in summer had the highest rates (78 and 82.4%), falling to 77 and 79% resp. for autumn matings. Overall "relative prolificacy" was 100-120%. Lamb birth weight was lowest for ewes mated in Jan.-June (4.3-4.5 kg), and highest for those mated in autumn (5.0 kg).


Accession: 001554968



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