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Full-Text Articles in Life Sciences
Cow Efficiency Pre- And Postweaning, C.A. Dinkel, W.J. Cosello
Cow Efficiency Pre- And Postweaning, C.A. Dinkel, W.J. Cosello
South Dakota Beef Report, 1986
Total energy intake of the cow for a year is not indicative of her efficiency at weaning or her net return to the enterprise. What is important is how she uses the energy she consumes. Likewise, cow size is not indicative of efficiency or net return. Breed differences probably exist , but they are not as important as individual differences in cow efficiency. Breed differences in postweaning efficiency were found only when efficiency was calculated on a cow basis and the cow's annual intake was included. Remember this is a cow efficiency study and the effect of different sires or …
Preliminary Results On Fertility, Prolificacy, Lamb Production, And Carcass Traits Of Romanov Sheep In Canada, Mohamed Hamed Fahmy
Preliminary Results On Fertility, Prolificacy, Lamb Production, And Carcass Traits Of Romanov Sheep In Canada, Mohamed Hamed Fahmy
3rd World Congress on Genetics Applied to Livestock Production
Performance of 14 ewes imported from France and their progeny born in Canada over a period of five years are reported. Least-squares means for fertility were 100% for ewes mated in the fall and winter and 42% for those mated in the summer (May - June). Litter size at birth (2.86 ± .15) and at weaning (2.10 ± .15) were significantly affected by season of mating and parity. The most prolific matings were those of the fall (3.18) and of ewes in their 5th parity (3.54). On the average .52 (18.2%) lambs died at birth and a further .25 (8.7%) …