黄山雄性短尾猴换群行为的研究

MIGRATION OF MALE TIBETAN MONKEYS (MACACA THIBETANA)AT MI. HUANGSHAN,ANHUI PROVINCE, CHINA

１９８６至１９９２年对安徽黄山一群短尾猴连续进行７年的换群行为研究表明：雄性的换群行为发生在临近交配期开始前后，大多数为成年个体；这些个体与换群前的顺位无关，且未受到迁入新群的其它个体更多的攻击，迁入雄体还倍受雌体青睐。据此推测，外群雌性的性吸引是雄性短尾猴换群的直接原因。雄性短尾猴换群的结果，降低了种群的近亲繁殖率，增加了不同种群间的基因交流，对种群遗传多样性的保存和发展具有重要意义．因此，进化选择压力有利于换群行为的发展。

A study on migration of male Tibetan monkeys at Mt. Huangshan (118°10'E, 30°29'N ), Anhui Province, China, was dealt with from 1986 to 1992. Though there are several troops of Tibetan monkeys in this area, the males are observed pnly the migration among troops. The migration of males is discovered before and after mating season beginning (Table 1) and seems to be irrelevant to the ranks of them in the original troop before emigration (Table 2). T here are no significant differences in aggression, affinity and sexual behavior between emigrating and non-emigrating males (Fig. 1, A ). However, after a male transferred into a new troop, he received more affinitive and sexual be haviors from females in new troop than the natal males did (Fig. 1, B～C). It appears to mean that the proximate cause of emigration of male Tibetan macaques may result.from the sexual attraction to extra-troop females.