The influences of environmental temperature and energy intake on plasma concentrations
of somatomedin-C/insulin-like growth factor-I (IGF-I) have been investigated in young
growing pigs. After 10 weeks acclimation, IGF-I was significantly greater at 35 than
10 °C (P < 0.001) and on a high than a low energy intake (P < 0.001). During the period
16-26 h after the last meal, there was a significant decline in IGF-I with time (P
< 0.01). These results can be explained partly in relation to differences in energy
exchange in warm and cold environments and may also be related to changes in growth
and thyroid hormones.
Somatomedin - Growth Hormones - Thyroid Hormones - Energy Intake - Temperature
