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AbstractFull Text

The objective of this study was to evaluate the effect of non-genetic factors on the characteristics of pre-weaning growth in sheep under tropical conditions. The sex of the lamb, the type of birth (single, multiple) and parity number on the birth weight, weaning weight and preweaning daily gain of ...

Author(s)
Cuello Estrada, M. A.; Moreno Torres, J. D.; Aguilar Aguilar, F. A.; Baracaldo Martínez, A.; Atuesta-Bustos, J. E.
Publisher
Universidad Nacional Mayor de San Marcos, Lima, Peru
Citation
Revista de Investigaciones Veterinarias del Perú (RIVEP), 2019, 30, 1, pp 231-239
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

3500 records of reproduction in a 7-yr period of Awassi sheep managed semi-intensively at the Kraim Research Centre were analysed. Pregnancy duration averaged 151.7±2.17 days, and was not significantly affected by litter size, although it was slightly longer in ewes carrying single lambs than in...

Author(s)
Kassem, R.; Owen, J. B.; Fadel, I.; Juha, H.; Whitaker, C. J.
Citation
Research and Development in Agriculture, 1989, 6, 3, pp 161-168
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