Effect of testosterone and melatonin on social dominance and agonistic behavior in male Tscheskia triton

文献类型： 外文期刊

第一作者： Zhang, Jianxu

作者： Zhang, Jianxu;Zhang, Zhibin;Wang, Dawei

作者机构：

关键词： Agonistic behavior;Castration;Melatonin;Photoperiod;Social dominance;Testosterone

期刊名称：BEHAVIOURAL PROCESSES （ 影响因子：1.777； 五年影响因子：2.096 ）

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收录情况： SCI

摘要： Social dominance and agonistic behavior play important roles in animal societies. Melatonin and testosterone are closely related to social dominance and agonistic behavior in rodents, but interactions between both of them remain unknown. In this study we investigated the effects of testosterone and melatonin by manipulating photoperiod and castration on social dominance and agonistic behavior in male Tscheskia triton. Castration significantly decreases social dominance of both short- and long-day males, suggesting that testosterone benefits social dominance of males in both breeding and non-breeding seasons. In intact conditions, long-day males tended to dominate short-day males, suggesting that the effect of testosterone on social dominance was a little stronger than melatonin. However, castrated short-day males became dominant over their castrated long-day opponents meaning that high melatonin levels obviously benefit social dominance in males. Hormone implantation indicated that testosterone had no effect on non-breeding condition, but that melatonin was important during the breeding season. Our results indicate that both testosterone and melatonin are important in determining social dominance in male hamsters, and the effect of testosterone appears to be stronger than melatonin. Testosterone is responsible for aggression and social dominance in male hamsters during the breeding season, while melatonin regulates behavior during non-breeding, probably due to the different seasonal secretory patterns of the hormones.

分类号： Q95

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