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The effects of heat stress on the development of the foetal lamb

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Hopkins, P. S., Nolan, C.J. and Pepper, P. M. (1980) The effects of heat stress on the development of the foetal lamb. Australian Journal of Agricultural Research, 31 (4). pp. 763-771.

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Article Link(s): https://doi.org/10.1071/AR9800763

Publisher URL: https://www.publish.csiro.au/paper/AR9800763

Abstract

Environmental heat stress in tropical sheep suppressed lamb birth weight, but the animals which did not experience hyperthermia under natural environmental conditions gave birth to significantly heavicr (P<0.01) lambs than their less adapted counterparts. Climate chamber studies designed to simulate the rectal temperature patterns of tropical sheep demonstrated that, without nutritional intervention, heat stress during the last month of pregnancy significantly retarded foetal growth (birth weight 2.3 kg v. 3.4 kg; P< 0.01) and maturation of wool follicles (P< 0.01). By comparison, severe nutritional restrictions during the last 3 months of pregnancy also caused a significant reduction in lamb birth weight (3.2 kg v. 3.9 kg; P<O.01), but this difference was not so marked.

Item Type:Article
Business groups:Animal Science
Subjects:Agriculture > Agriculture (General) > Agriculture and the environment
Animal culture > Sheep
Animal culture > Housing and environmental control
Deposited On:06 Jul 2022 01:52
Last Modified:06 Jul 2022 01:52

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