生理寿命 meaning in Chinese

physiological longevity

The death rate of the population in jigong mountain is fairly lower initially and relatively stable afterwards . but after 9 years , the death rate of individuals in the population raised and achieved the biggest physiological life span at 12 years
而从死亡率曲线图看，鸡公山种群的死亡率一开始比较低，以后一直比较稳定，个体在9龄以后死亡率开始升高，到12龄时达到种群内的最大生理寿命并死亡。
The death rate of individuals in beiwenquan population is fairly higher initially and stable afterwards , while after 10 years , the death rate has appeared several waves , and then achieved the biggest physiological life span at 13 years with the death rate sharply up
北温泉种群的死亡率在幼苗时比较高，以后比较稳定，到10龄时开始下降，以后出现几次波动，个体在13龄时达到种群的最大生理寿命，死亡率急剧升高并最终消失。