Johnsen T S, Zuk M
Department of Biology, University of California, Riverside 92521, USA.
Horm Behav. 1995 Dec;29(4):593-8. doi: 10.1006/hbeh.1995.1288.
We investigated the relationship between aggression, plasma testosterone level (T), and change in T in captive male red jungle fowl (Gallus gallus). T measured on day 1 of our experiment was positively correlated with T on day 8, suggesting that T remains constant in males when the social environment is stable. During aggressive encounters that escalated to include physical combat, males that attacked first (won) had increased T relative to their opponent. Males did not differ in T measured 1 week before the aggressive encounter. Our data suggest that an increase in T during aggression is associated with winning in escalated fights.
我们研究了圈养雄性原鸡（Gallus gallus）的攻击性、血浆睾酮水平（T）以及T的变化之间的关系。在我们实验的第1天测得的T与第8天的T呈正相关，这表明当社会环境稳定时，雄性的T保持不变。在升级为包括身体搏斗的攻击性遭遇中，首先发起攻击（获胜）的雄性相对于其对手的T有所增加。在攻击性遭遇前1周测得的T，雄性之间没有差异。我们的数据表明，攻击过程中T的增加与升级战斗中的获胜有关。
