
TY  - JOUR
A1  - Hopkins, PS 
A1  - Nolan, CJ 
A1  - Pepper, PM 
T1  - The effects of heat stress on the development of the foetal lamb
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1980
VL  - 31
IS  - 4
SP  - 763
EP  - 771
KW  - 
UR  - https://doi.org/10.1071/AR9800763 
N2  - 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. 
ER  -

