Androgen dependency of XXXX effects on @entity146 : a seasonal rhythm in high-ranking squirrel monkeys.

@entity167 @entity1 @entity251 @entity146
The relationship between @entity251 and @entity167 's effects on social behavior within established groups of squirrel monkeys was studied. Consistent behavioral differences between dominant and subordinate monkeys were quantitatively measured using computer assisted, continuous measurement techniques. Blood samples collected during the mating season revealed plasma @entity251 measures of 202.9 +/- 13.4 ng/ml in dominant monkeys and 28 +/- 6.2 ng/ml in subordinate monkeys. @entity167 (0.1-1.0 g/kg, PO) produced a dose-related decrease of @entity251 levels in dominant monkeys. Concurrently, @entity167 produced biphasic effects on the behavior of dominant but not subordinate monkeys; low doses (0.1, 0.3 g/kg) increased the frequency of threats, grasps, and displacements. Subordinate monkeys were not affected at any dose. During the non-mating season, plasma levels of @entity251 fell to 55.2 +/- 23.7 ng/ml in dominant monkeys and 7.3 +/- 1.7 ng/ml in subordinate monkeys. Plasma @entity251 and the social behavior of both dominant and subordinate monkeys were unaffected by @entity167 . These findings provide further evidence of a specific association between @entity167 , @entity251 and aggression in the non- @entity1 primate. High levels of @entity251 that are evident during the mating season of dominant, male squirrel monkeys may activate @entity167 sensitive brain substrates of @entity146 .
