Snub-nosed monkey is the associated animal variety of the giant panda. The yusually live in groups alternatively on the trees or on the ground in the coniferous and broadleaf forest some 1,700 to 3,400 meters above se...Snub-nosed monkey is the associated animal variety of the giant panda. The yusually live in groups alternatively on the trees or on the ground in the coniferous and broadleaf forest some 1,700 to 3,400 meters above sea level. The number of the monkey group depends upon the food supply and the surroundings where they live. Their food mostly include tender tree leaves, flowers, fruits, twigs,bark, grass roots, liver mosses, and variousmushrooms, as well as little birds,bird eggs and insects here and there. After a bumper food supply season of summer, the monkeys will put on flesh and turn to be very strong to come in the height ofrertility.展开更多
Infanticide by males is a common phenomenon in mammals, especially primates, as lactation lasts much longer than gestation in many species. Usually, infanticidal episodes occur soon after group takeovers, and are trad...Infanticide by males is a common phenomenon in mammals, especially primates, as lactation lasts much longer than gestation in many species. Usually, infanticidal episodes occur soon after group takeovers, and are traditionally considered a male reproductive strategy （i.e., support the sexual selection hypothesis, Hrdy, 1974）. To verify the validity of this conception, we observed one group of Franqois＇ langurs in the Nonggang Nature Reserve, China, between August 2003 and July 2004. During the study period, a Francois＇ langur female with the youngest infant in the group was attacked three times by immigrating males, and later disappeared by the third day after the final attack. We suggest that these attacks on the female-infant dyad represent infanticide attempts by males, and may be the cause of the adult female and her infant＇s disappearance. Presumably, that female dispersed with her infant to avoid infanticide and was not killed. Though these observations do not completely verify the sexual selection hypothesis, they are not inconsistent with it.展开更多
文摘Snub-nosed monkey is the associated animal variety of the giant panda. The yusually live in groups alternatively on the trees or on the ground in the coniferous and broadleaf forest some 1,700 to 3,400 meters above sea level. The number of the monkey group depends upon the food supply and the surroundings where they live. Their food mostly include tender tree leaves, flowers, fruits, twigs,bark, grass roots, liver mosses, and variousmushrooms, as well as little birds,bird eggs and insects here and there. After a bumper food supply season of summer, the monkeys will put on flesh and turn to be very strong to come in the height ofrertility.
基金supported by National Nature Science Foundation of China (31172122)Guangxi Nature Science Foundation (2012GXNSFAA053039)
文摘Infanticide by males is a common phenomenon in mammals, especially primates, as lactation lasts much longer than gestation in many species. Usually, infanticidal episodes occur soon after group takeovers, and are traditionally considered a male reproductive strategy （i.e., support the sexual selection hypothesis, Hrdy, 1974）. To verify the validity of this conception, we observed one group of Franqois＇ langurs in the Nonggang Nature Reserve, China, between August 2003 and July 2004. During the study period, a Francois＇ langur female with the youngest infant in the group was attacked three times by immigrating males, and later disappeared by the third day after the final attack. We suggest that these attacks on the female-infant dyad represent infanticide attempts by males, and may be the cause of the adult female and her infant＇s disappearance. Presumably, that female dispersed with her infant to avoid infanticide and was not killed. Though these observations do not completely verify the sexual selection hypothesis, they are not inconsistent with it.
