Metabolic responses to mid-pregnancy shearing that are associated with a selective increase in the birth weight of twin lambs.

作者: D.K Revella , S.F Main , B.H Breier , Y.H Cottam , M Hennies

DOI: 10.1016/S0739-7240(00)00059-X

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摘要: Abstract Previous studies have shown that shearing pregnant ewes at mid- or late-pregnancy is associated with an increase in lamb birth weight. The present study was designed to investigate metabolic responses may underlie this response. Single- and twin-bearing were either unshorn shorn mid-pregnancy (Day 69 of pregnancy; P69), insulin, glucose epinephrine challenges conducted on P109–111 P132–134. Shearing increased the weight twin lambs by over 1 kg (P

参考文章(34)
Breier Bh, Blum Wf, Radioimmunoassays for IGFs and IGFBPs. Growth regulation. ,vol. 4, pp. 11- 19 ,(1994)
A. W. Bell, B. W. McBride, R. Slepetis, R. J. Early, W. B. Currie, Chronic Heat Stress and Prenatal Development in Sheep: I. Conceptus Growth and Maternal Plasma Hormones and Metabolites Journal of Animal Science. ,vol. 67, pp. 3289- 3299 ,(1989) , 10.2527/JAS1989.67123289X
John Bligh, Heat stress: Physical exertion and environment Journal of Thermal Biology. ,vol. 14, pp. 171- ,(1989) , 10.1016/0306-4565(89)90041-7
McCutcheon Sn, Revell Dk, Kenyon Pr, Morris St, Improving lamb birth weight through mid-to-late-pregnancy shearing: a review of recent studies Proceedings of the New Zealand Society of Animal Production. ,vol. 59, pp. 70- 72 ,(1999)
J. W. Fuquay, Heat stress as it affects animal production. Journal of Animal Science. ,vol. 52, pp. 164- 174 ,(1981) , 10.2527/JAS1981.521164X
Ernst Knobil, Jimmy D. Neill, The Physiology of reproduction Psychoneuroendocrinology. ,vol. 7, pp. 641- 642 ,(1988)
Julie A. Petterson, Frank R. Dunshea, Richard A. Ehrhardt, Alan W. Bell, Pregnancy and undernutrition alter glucose metabolic responses to insulin in sheep. Journal of Nutrition. ,vol. 123, pp. 1286- 1295 ,(1993) , 10.1093/JN/123.7.1286
B. A. Young, Cold stress as it affects animal production. Journal of Animal Science. ,vol. 52, pp. 154- 163 ,(1981) , 10.2527/JAS1981.521154X
A. Austin, N. Young, The effect of shearing pregnant ewes on lamb birth weights Veterinary Record. ,vol. 100, pp. 527- 529 ,(1977) , 10.1136/VR.100.25.527