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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

For 1112 Polwarth and 380 Corriedale lambs born in Brazil in 1979-87, birth weight averaged 3.54 and 3.79 kg respectively for males and 3.35 and 3.49 kg for females, the differences between the breeds and sexes being significant. Birth weight was significantly affected by year of birth and age of...

Author(s)
Roda, D. S.; Santos, L. E. dos; Cunha, E. A. da
Publisher
Departmento da Producao Animal, Secretaria da Agricultura, Industria e Comercio, Sao Paulo, Brazil
Citation
Boletim de Indústria Animal, 1995, 52, 1, pp 67-70
Abstract

For 6601 Pelibuey lambs, birth weight averaged 2.68±0.04 kg and weaning weight 14.4±0.12 kg; for 4727 lambs, preweaning daily gain averaged 103±1.17 g. Weaning weight and daily gain were significantly affected by flock, month of birth, sex of lamb and type of birth (single or twin), and year of...

Author(s)
Ramírez Baffi, A.; Guerra, D.; Garces, N.; González, G.
Citation
Revista Cubana de Reproducción Animal, 1992, 17-18, 1-2, pp 67-76
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
Abstract

For 65 Morada Nova (MN), 45 Santa Inês (SI) and 58 Brazilian Somali lambs, the time from birth to the 1st sucking averaged 22.2, 48.4 and 28.8 min resp., the difference between the SI lambs and those of the other 2 breeds being significant. Type of birth (single or twin) or sex of lamb had no...

Author(s)
Silva, A. E. D. F.; Nunes, J. F.
Citation
Revista Brasileira de Reprodução Animal, 1985, 9, 2, pp 63-74
Abstract

For 493 Nali, 543 Soviet Merino (SM) × Nali, 520 Corriedale × Nali, and 118 SM × (Corriedale × Nali) lambs, preweaning mortality was 23.93, 19.89, 15.00 and 22.03% resp. Mortality was 12.84% in the 1st month of life vs. 5.28 and 2.75% in the 2nd and 3rd months. Sex and season of birth had no...

Author(s)
Poonia, J. S.; Singh, B.; Balaine, D. S.
Citation
Livestock Adviser, 1983, 8, 12, pp 7-10
Abstract

Of 442 Ideal [Polwarth] lambs born in Brazil during a 3-yr period, 89.4% survived to weaning vs. 78.2% of 124 Suffolk lambs. For male and female Ideal lambs, birth weight averaged 3.8 and 3.5 kg resp. vs. 3.6 and 3.5 kg for Suffolk males and females , and weaning weight (at 126 days) averaged 17.8...

Author(s)
Roda, D. S.; Santos, L. E. dos; Campos, B. do E. S. de; Sanchez, M. J. F.
Publisher
Departmento da Producao Animal, Secretaria da Agricultura, Industria e Comercio, Sao Paulo, Brazil
Citation
Boletim de Indústria Animal, 1981, 38, 1, pp 31-43

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