found that as BW increases basal plasma GH and secretion rate per unit
BW decreases. Half-life and secretion rate of GH, all decreases as the calves become older (Mears and
Schaalje, 1993). This may also hold true in yaks. Higher basal plasma GH which may be due to higher secretion
rate and/or lower metabolic clearance rate of GH in younger animals in which growth potential is very high,
is consistent with a role of GH for body growth (Trenkle,1971; Mondal and Prakash, 2004).