At the same time , the age structure , time - specific life table , survivorship curve , fecundity schedule and leslie matrix were obtained through ana1ysing the demography and age struct ' ures of each subpopulation 對種群年齡結構研究中,編制了種群靜態(tài)生命表、生殖力表,利用建立的矩陣模型預測了種群數量的動態(tài)趨勢,并進行了環(huán)境篩的分析,推斷了種群致危因素。