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Abstract

Data on 23 litters from Large White (LW) × (LW × Landrace) gilts and 33 litters from 11 LW × Landrace sows in Spain were analysed. Females were mated with a Dutch Landrace (DL) or a Piétrain × Duroc boar. There were significant differences between gilts and sows in average birth weight of female...

Author(s)
Daza, A.; Evangelista, J. N. B.; Gutiérrez Barquín, M. G.
Citation
ITEA Producción Animal, 1997, 93, 2, pp 119-129
Abstract

For 484 Polwarth ewes, lambing in 1979-92, gestation length averaged 148.5 days. Of lambs born, 258 were male and 226 female, and 102 lambings resulted in the birth of twins. The birth weight of 492 lambs averaged 2.74 kg and was significantly affected by sex of lamb, litter size, parity and year...

Author(s)
Lanzoni, N. A.; Queiroz, S. A.; Albuquerque, L. G.; Garcia Sobrinho, A.; Andrade, A. F.
Citation
Ars Veterinaria, 1996, 12, 2, pp 178-187
Abstract

Data were obtained over a 10-yr period for 3 Polish Lowland flocks comprising 10 613 ewes and 14 277 lambs. Lambing rate was 134.5. The number of lambs dying before weaning was 1776. Type of birth of the ewe had no significant effect on preweaning survival of the offspring on 2 farms, but had a...

Author(s)
Lipecka, C.; Szymanowska, A.; Pięta, M.
Citation
Roczniki Nauk Rolniczych. Seria B, Zootechnicza, 1991, 106, 1-2, pp 121-126
Abstract

1483 birth and 1209 weaning records of Dorper lambs in a commercial flock were used to investigate the effects of environmental factors on birth and weaning weights and on preweaning growth and survival. Preweaning survival was relatively high (0.91) and largely independent of known sources of...

Author(s)
Cloete, S. W. P.; Villiers, T. T. de
Citation
South African Journal of Animal Science, 1987, 17, 3, pp 121-127
Abstract

For 70, 50, 28 and 46 standard ♀♀ slaughtered at 6 months of age in Apr., June, Oct. and Dec. resp., body weight averaged 3.50, 3.77, 4.03 and 3.56 kg, the annual average being 3.71 kg. Corresponding figures for body length were 40.0, 43.9, 47.4, 42.8 and 43.5 cm. For 30, 56, 28 and 60 ♂♂...

Author(s)
Tsepkova, N. A.; Romenskiĭ, M. G.; Chervyakov, V. I.; Maĭer, Z. G.
Citation
Nauchnye Trudy. Nauchno-Issledovatel'skiĭ Institut Pushnogo Zverovodstva i Krolikovodstva, 1982, 27, pp 15-22

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