Barr G A, Gibbons J L, Moyer K E
J Comp Physiol Psychol. 1976 Dec;90(12):1169-83. doi: 10.1037/h0077291.
Male and female albino rats were tested for intraspecies aggression without the use of shock. In the first experiment, male pairs showed more biting attacks, offensive sideways movements, and self-grooming than did female pairs; male pairs also showed more stereotyped defensive/submissive behaviors and were wounded more frequently. The second experiment examined the effects of neonatal castration and testosterone propionate (TP) administration on fighting. Males castrated at birth attacked other males less frequently than did controls when tested with TP treatment as adults. The TP given at birth to neonatally castrated males restored attacks to control levels. Females given TP as neonates did not differ from either male or female controls. Other aggressive/defensive behaviors, however, did not show this pattern. The results suggest that while the presence of testosterone during a brief postnatal period and during adulthood is necessary for attack behavior to occur, other related behaviors may not be affected in a similar manner.
在不使用电击的情况下，对雄性和雌性白化大鼠进行种内攻击行为测试。在第一个实验中，雄性配对比雌性配对表现出更多的撕咬攻击、攻击性侧向移动和自我梳理行为；雄性配对还表现出更多刻板的防御/顺从行为，且受伤频率更高。第二个实验研究了新生期阉割和注射丙酸睾酮（TP）对打斗行为的影响。成年后接受TP治疗测试时，出生时即被阉割的雄性比对照组雄性攻击其他雄性的频率更低。出生时给新生期阉割的雄性注射TP可使攻击行为恢复到对照组水平。新生期接受TP的雌性与雄性或雌性对照组没有差异。然而，其他攻击/防御行为并未呈现这种模式。结果表明，虽然在出生后的短暂时期和成年期存在睾酮是攻击行为发生的必要条件，但其他相关行为可能不会受到类似影响。
