Rhesus, monkey (Macaco mulatta) at Nanwan Peninsula of Hainan Island were researched for five years by field observation from 1981 to 1985. By the end of 1984, the monkey population at the peninsula had reached 930 individuals. The average annual population growth rate was about 13% from 1965 to 1984. The relative equation between the growth rate and population density was described by y=0.0003x2 + 0.0857x+ 7.3534. The population growth equation can be written as exponential growth equation Y = 0.1253e0.105...