Balthazart J, de Rycker C
Z Tierpsychol. 1979 Jan;49(1):55-64. doi: 10.1111/j.1439-0310.1979.tb00273.x.
The behavioural effects of testosterone propionate (TP), 5alpha-dihydrotestosterone (DHT) and oestradiol benzoate (OB) were investigated in day-old chicks during imprinting sessions to a duck model. TP increased the duration of peeping while inhibiting the following reaction and the twitters. DHT had more or less the same effects while OB induces the reverse behavioural changes. The behavioural effects of hormone injections agree with behavioural sex differences observed in non-injected animals: males peep more than females which on the other hand produce more twitters. This could be related to sex differences in the hormonal status of the birds at hatching, as it is known that during incubation male chick embryos have higher plasma testosterone levels than females of corresponding ages.
在雏鸡对鸭模型的印记训练期间，研究了丙酸睾酮（TP）、5α-二氢睾酮（DHT）和苯甲酸雌二醇（OB）的行为效应。TP增加了鸣叫持续时间，同时抑制跟随反应和啁啾声。DHT的作用大致相同，而OB则引起相反的行为变化。激素注射的行为效应与未注射动物中观察到的行为性别差异一致：雄性比雌性鸣叫更多，而雌性则发出更多啁啾声。这可能与孵化时鸟类激素状态的性别差异有关，因为已知在孵化期间，雄性雏鸡胚胎的血浆睾酮水平高于同龄雌性。
