Vandenheede M, Bouissou M F
Laboratoire d'Etude du Comportement Animal, I.N.R.A. Centre de Tours-Nouzilly, France.
Horm Behav. 1993 Dec;27(4):435-48. doi: 10.1006/hbeh.1993.1032.
The effects of prolonged androgen treatment (testosterone propionate, 10 mg/day for 56 days) on fear reactions in ewes were studied using a battery of tests previously designed and validated. These tests involved situations classically reported to induce fear in sheep: isolation from conspecifics, surprise, and presence of a human. Testosterone-treated ewes differed from controls in a number of behavioral characteristics which indicate that they are less fearful in the various test situations. Their overall scores were respectively 9.5 vs 11.5 (P < 0.05) in the isolation test, 7.9 vs 13.1 (P < 0.001) in the surprise test, and 7.8 vs 13.2 (P < 0.001) in the human test. Testosterone treatment thus clearly reduces fear reactions in ewes subjected to nonsocial situations that are typically fear-eliciting.
使用一系列先前设计并验证过的测试，研究了长期雄激素处理（丙酸睾酮，每天10毫克，持续56天）对母羊恐惧反应的影响。这些测试涉及一些经典报道中会引起绵羊恐惧的情境：与同种动物隔离、意外情况以及人类的出现。接受睾酮处理的母羊在一些行为特征上与对照组不同，这表明它们在各种测试情境中不那么恐惧。在隔离测试中，它们的总分分别为9.5和11.5（P < 0.05）；在意外测试中为7.9和13.1（P < 0.001）；在人类测试中为7.8和13.2（P < 0.001）。因此，睾酮处理明显降低了处于通常会引发恐惧的非社交情境中的母羊的恐惧反应。
