Winning fights elevates testosterone levels in California mice and enhances future ability to win fights
Winning fights elevates testosterone levels in California mice and enhances future ability to win fights
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DOI：
10.1016/j.yhbeh.2005.04.007
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发表时间：
2005-09-01
影响因子：
3.5
通讯作者：
Marler, CA
中科院分区：
文献类型：
--
作者：
Oyegbile, TO;Marler, CA
“赢家效应”已经在许多物种中进行了研究，但在哺乳动物中却很少。我们比较了在加利福尼亚老鼠（Peromyscus californicus）中赢得三次、两次、一次或零次居民入侵者遭遇对赢得随后的攻击遭遇的可能性的影响。在训练阶段，我们通过与轻度镇静的小型入侵者进行比赛来确保常驻雄性赢得所有的比赛。在测试阶段，常驻的雄性遇到了一个不熟悉的、势均势敌的入侵者，这个入侵者有过获胜的经验，而且体型比常驻的雄性大。在最后的测试中，当他们之前经历过两次胜利时，睾酮(T)血浆水平显着增加，并且在之前的三次胜利后，赢得未来战斗的可能性显着增加，与内在的战斗能力无关。我们假设了一种“赢家挑战”效应，在这种效应中，增加的T水平有助于加强雄性加利福尼亚小鼠的赢家效应。(c) 2005爱思唯尔公司版权所有。
The 'winner effect' has been studied in a variety of species, but only rarely in mammals. We compared effects of winning three, two, one, or zero resident-intruder encounters on the likelihood of winning a subsequent aggressive encounter in the California mouse (Peromyscus californicus). During the training phase, we ensured that resident males won all encounters by staging contests with mildly sedated, smaller intruders. During the test phase, the resident male encountered an unfamiliar, more evenly matched intruder that had experience winning an encounter and was larger than the resident. Testosterone (T) plasma levels significantly increased after the final test when they had experienced two prior winning encounters, and the probability of winning a future encounter increased significantly after three prior wins independent of intrinsic fighting ability. We hypothesize a 'winner-challenge' effect in which increased T levels serve to reinforce the winner effect in male California mice. (c) 2005 Elsevier Inc. All rights reserved.