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CAB Reviews

A reviews journal covering agriculture, global health, nutrition, natural resources and veterinary science

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The repeatability of twinning, measured at individual calvings, is low (0.06), and the heritability is also low (0.03). Small differences in dizygotic twinning rate in cattle occur due to age, breed, nutrition and country. Conventionally, the rate of response to selection for twinning has been...

Author(s)
Morris, C. A.
Citation
Animal Breeding Abstracts, 1984, 52, 11, pp 803-819

Regressions or correlations of postcalving anoestrous interval on/with first calving date for cows and heifers were mainly negative. The existence of some positive correlations may be due to different feeding levels in the experiments reviewed. A restricted precalving diet, with no increase in food ...

Author(s)
Morris, C. A.
Publisher
CABI Publishing, Wallingford, UK
Citation
Animal Breeding Abstracts, 1980, 48, 11, pp 753-767

In trials where the effect of one- v two-year-old first joining was applied to random samples of heifers, results showed that lifetime calf production from those joined as yearlings was either significantly higher, or not significantly different. Summaries of comparisons of some effects are given...

Author(s)
Morris, C. A.
Publisher
CABI Publishing, Wallingford, UK
Citation
Animal Breeding Abstracts, 1980, 48, 10, pp 655-676

The objective is to review the published relationships between cow size and economic efficiency, considering the implications of different definitions. In a previous biological review, Morris and Wilton maintained a distinction between beef and dairy production. In the present review, the two are...

Author(s)
Morris, C. A.; Wilton, J. W.
Citation
Animal Breeding Abstracts, 1977, 45, 3, pp 139-151

In this review some comparisons are made between cattle in yards or on pasture.

Author(s)
Morris, C. A.; Wilton, J. W.
Citation
Animal Breeding Abstracts, 1977, 45, 3, pp 139-153