LONG-TERM CHRONIC TREATMENT WITH STANOZOLOL LACKS SIGNIFICANT EFFECTSON AGGRESSION AND ACTIVITY IN YOUNG AND ADULT MALE LABORATORY MICE

1. Repeated doses of the anabolic-androgenic steroid stanozolol were a ssessed for their effects on agonistic behavior, motor activity, and b ody weight in both young and adult male laboratory mice. 2. Stanozolol significantly increased weight gain in young, but not older subjects, especially at the highest doses. 3. There were, however, no significa nt differences in motor activity or in ethologically assessed social b ehavior (including aggression) in young or adult mice.