MATING IN THE MONOGAMOUS MALE - BEHAVIORAL CONSEQUENCES
MATING IN THE MONOGAMOUS MALE - BEHAVIORAL CONSEQUENCES
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DOI：
10.1016/0031-9384(94)00362-9
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发表时间：
1995-04-01
影响因子：
2.9
通讯作者：
WINSLOW, JT
中科院分区：
文献类型：
--
作者：
INSEL, TR;PRESTON, S;WINSLOW, JT
在一夫一妻制的哺乳动物中，雄性通常表现出对单一配偶的选择性归属、高水平的父爱关怀以及对同种动物的攻击性以保护配偶和后代。我们之前已经描述过雄性草原田鼠（Microtus ochrogaster）交配后选择性攻击和归属感如何增加。目前的研究进一步探讨了该物种雄性交配后的行为变化。第一组实验测试了雄性在交配、社交（但不是性）接触或没有社交接触 24 小时后的多项行为指标。交配 24 小时后，但在其他两种条件后，攻击性和归属感（伴侣偏好）增加，如先前报道的那样。此外，交配的动物表现出对十字迷宫张开手臂的更多探索，这与恐惧感的降低相一致。父亲的行为（在所有三种情况下都很高）或镇痛（通过甩尾潜伏期评估）没有组间差异。为了确定诱导攻击性所需的最低交配量，在交配 1.6 或 24 小时后，在常驻-入侵者范式中对雄性进行了测试。尽管交配 1 小时与威胁和攻击频率的短暂增加有关，但只有在交配 24 小时的雄性中才观察到全方位的持久攻击行为。在最后的实验中，研究人员在密切相关的山地田鼠（Microtus montanus）的雄性中研究了交配的行为后果，这种田鼠不进行配对。这种非一夫一妻制的雄性田鼠在交配 24 小时后并没有表现出攻击性、伴侣偏好或迷宫探索能力的增加。这些结果证明了延长交配对于一夫一妻制雄性中诱导配对关系的重要性，并且表明攻击性和归属感的增加与配对雄性中恐惧感的降低有关。
In monogamous mammals, males typically show selective affiliation with a single mate, high levels of paternal care, and aggression towards conspecifics to protect mate and offspring. We have previously described how selective aggression and affiliation increase after mating in the male prairie vole, Microtus ochrogaster. The current studies further explored the behavioral changes that follow mating in the male of this species. The first set of experiments tested males on several behavioral measures after 24 h of either mating, social (but not sexual) exposure, or no social contact. After 24 h of mating, but not after the other two conditions, aggression and affiliation (partner preference) increased as previously reported. In addition, mated animals showed increased exploration of the open arms of a plus maze, consistent with decreased fearfulness. There were no group differences in paternal behavior (which was high in all three conditions) or analgesia (assessed by tail flick latency). To determine the minimum amount of mating necessary for the induction of aggression, males were tested in a resident-intruder paradigm after 1,6, or 24 h of mating. Although 1 h of mating was associated with a transient increase in the frequency of threats and attacks, the full spectrum of enduring aggression was observed only in the males given 24 h of mating. In a final experiment, the behavioral consequences of mating were studied in males of the closely related montane vole (Microtus montanus) which does not pair bond. Males of this nonmonogamous vole species did not show increased aggression, partner preference, or alterations in plus maze exploration following 24 h of mating. These results demonstrate the importance of prolonged mating for the induction of pair bonding in the monogamous male and they suggest that increases in aggression and affiliation are associated with decreased fearfulness in pair bonded males.