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Abstract

Data from a registered Hereford herd and a registered Africander herd were studied. In Africanders, there was a small but non-significant increase in weaning traits (90-day weight and growth between birth and 90 days) with increase in age and parity of the dam, whereas in Herefords age and parity...

Author(s)
Swanepoel, F. J. C.
Citation
South African Journal of Animal Science, 1988, 18, 1, pp 47-52
Abstract

Herd, year of birth, sex, season of birth and interaction effects significantly affected birth and weaning weights in Bonsmara calves from 6 herds, studied over 6 yr. The birth weight of ♂♂ and ♀♀ averaged 34.37±1.27 and 32.05±0.60 kg resp., and weaning weight 194.61±3.99 and 184.01±2.28 kg. The...

Author(s)
Zyl, J. G. E. van; Venter, H. A. W.; Groeneveld, H. T.
Citation
South African Journal of Animal Science, 1987, 17, 4, pp 185-187
Abstract

Data collected on 1852 lambs in the 2 flocks during 1978-81 were analysed. One group was housed and supervised constantly during lambing, while an extensively reared group was supervised 3 times daily during lambing. Preweaning mortality was significantly higher in SA Mutton Merinos (SAMM) than...

Author(s)
Brand, A. A.; Cloete, S. W. P.; Villiers, T. T. de
Citation
South African Journal of Animal Science, 1985, 15, 4, pp 155-161
Abstract

Data collected over 25 yr on 1142 Africander calves, the progeny of 27 sires, were analysed. Year, sire, month of birth, sex and weight of dam before calving all had significant effects on weaning traits. Large variations in birth weight, 90-day weight and weaning weight and in live-weight gain to...

Author(s)
Heyns, H.
Citation
South African Journal of Animal Science, 1977, 7, 1, pp 29-35
Abstract

Data collected over a 25-yr period on 1142 Africander calves, the progeny of 27 sires, were analysed. Estimates of h2 were: 0.18 for birth weight, 0.19 for live weight at 90 days, 0.05 for weaning weight (210 days), 0.09 for weight gain to 90 days, and -0.05 for weight gain to weaning. Genetic,...

Author(s)
Heyns, H.
Citation
South African Journal of Animal Science, 1977, 7, 2, pp 149-155
Abstract

Data collected over a 6-yr period on 2634 South African Merino females and their 2627 lambs were analysed. For lambs born in autumn (Mar.-Apr.) and spring (Sep.-Oct.) resp., birth weight averaged 3.53 and 4.13 kg (P<0.01), birth weight/ female joined 3.10 and 4.41 kg (P<0.05), weaning weight...

Author(s)
Marais, P. G.; Pretorius, P. S.
Citation
Agroanimalia, 1976, 8, 2, pp 21-23