title: Seasonality of mating and birth in wild black-and-white snub-nosed monkeys (Rhinopithecus bieti) at Xiaochangdu, Tibet.
abstract: Data on mating and birth seasonality were recorded in wild black-and-white snub-nosed monkeys (Rhinopithecus bieti) at Xiaochangdu in the Honglaxueshan National Nature Reserve, Tibet. This represents one of the harshest habitats utilized by any nonhuman primate. Variation in food availability, temperature, and photoperiod were examined to identify ecological influences on the timing of reproductive events. Mating was observed to occur mostly between July and October and to coincide with peak food availability and temperature, while births occurred between February and mid-March, the end of the period of lowest food availability. This pattern may be an adjustment to the extreme environmental conditions characteristic of this field site.
authors.affiliation: College of Life Science and Technology, Central South University of Forestry and Technology, 498 Shaoshan Nanlu, 410004, Changsha, Hunan, People's Republic of China. zorph111@yahoo.com.cn
authors.forename: Zuo-Fu
authors.initials: ZF
authors.lastname: Xiang
authors.forename: Ken
authors.initials: K
authors.lastname: Sayers
mesh_terms: D000818:Animals; D011232:Chemical Precipitation; D016673:Colobinae / Q000502:physiology*; D017753:Ecosystem; D036801:Parturition / Q000502:physiology*; D017440:Photoperiod; D012621:Seasons; D012726:Sexual Behavior, Animal / Q000502:physiology*; D013696:Temperature; D018609:Tibet