| From June 2007 to December 2009, we conducted the study on the on the social unit changes and caring infants behavior at Dalongtan Sichuan snub-nosed monkeys research center in the Shennongjia National Nature Reserve (110°18'E,31°29'N).Behavior sampling, focal animal sampling and all-occurrence recording method were applied in our study.The results showed that from June 2007 to December 2009,5 cases of resident-male takeover were observed.6 adult individuals participated competition with former resident males, 3 of them from All-Male Unit(AMU), intense fighting companied with resident-male takeover, there was no infanticide behavior after resident-male replacement. But the new resident-male would expel young male monkey belonged to the original unit. famle monkeys followed adult-male,3 adult-male builded new units. We observed 11 females transferred between One-Male Unit(OMU)and 3 females disappeared from the troop,indicating that it is both males and females that dispersed in this species.The main results of caring infants behavior were as follows:significant difference of time spent on nipping at 3,5 and 6 month age (P＜0.05).Maternal restrainning behavior had high frequency at 2 and 3 month age.There was significant different on mother-restrainning behavior about the mothers who have experienced caring baby monkeys and who haven't (F=5.23, df=1,P<0.05).From birth to six months old, there was a negative correlation between the age of infants and the number of aunting behaviors. The newborn infant who birthed earlier are more attractive to non-mother females to kidnapping and embracing. The infants started to contact adult male after 2 month old, the total number was 61,90.16 percent contacted with resident-mle,9.84 percent contacted with other resident-mle.
|
PDF Full Text Request