Plasma insulin-like growth factor-I, XXXX and morphological changes in the growth of captive @entity32092 ( @entity32092 ) from birth to adolescence.

@entity72802 @entity1 @entity251 @entity32092 @entity831
We examined growth changes in concentrations of plasma insulin-like growth factor-1 ( @entity72802 ) and @entity251 , and somatometric parameters in two captive male @entity32092 from birth to about 4 years of age, to examine the evolution of growth patterns in primates. Plasma @entity72802 concentrations in @entity32092 generally increased with age with values ranging from 200 to 1100 ng/ml. The growth profiles in plasma @entity72802 in the gibbons were similar to those reported for @entity831 . The highest concentrations of plasma @entity251 (230 and 296 ng/dl) were observed within the first 0.3 years from birth, then the concentrations rapidly decreased and fluctuated below 100 ng/dl. Continuously higher @entity72802 concentrations were observed after 2.6 and 3.5 years of age. The profiles of plasma @entity251 in these gibbons also resembled those of other primates including @entity1 . However, their plasma @entity251 levels in both neonate and adult stages (60 ng/dl) were lower than those reported for macaques and @entity831 of respective stages. The obtained growth profiles of plasma @entity72802 and @entity251 suggest that the adolescent phase starts around 2.6 or 3.5 years of age in male @entity32092 . The growth trend in many morphological parameters including body weight showed a linear increase without a significant growth spurt at approximately the onset of puberty. Head length and first digit length had reached a plateau during the study period. Brachial index, which indicates the relative length of forearm to upper arm, significantly increased gradually through the growth period. This result indicates that forearm becomes relatively longer than the upper arm with growth, which may be an evolutionary adaptation for brachiation.
