其中，轮虫种群增长率与食物浓度间呈曲线相关；
The relationship between the population growth rate and the food concentration was curvilinear correlation.
结果表明：温度对该种轮虫种群密度及种群增长率均有显著影响（P。
The results showed that temperature affected the population density and population growth rate significantly(P<0.
结论：川楝素和印楝素通过对家蝇生长发育和生殖能力的抑制，使其种群增长率降低。
Conclusion: Both toosendanin and azadirachtin can throw influences on growth development and fecundity of the target insects, reducing the increase rate of the experimental populations.
藻类食物的种类和品系对角突臂尾轮虫的种群增长率、个体体积、卵体积和相对卵大小均有显著的影响。
Food type and strain affected the population growth rate, body volume, egg volume and relative egg size significantly.
种群密度过高产生的拥挤效应和食物资源不足是造成种群出生率和年度增长率下降的主要原因。
The effect of crowding and physiological stress and shortage of food resources were the main reasons for the decline of population natality and yearly increase rate.
第一部分研究的是以增长率为控制的种群系统的能控性问题。
In first part, we study the controllability of the species system with control as the increasing rate.
种群的净增殖率、内禀增长率及周限增长率较高，而种群的世代周期及加倍时间偏低；
Its net reproductive rate, the intrinsic rate of increase and the increment rate per unit were high, but its generation span and the time of double population size were low.
温度和姐妹种对轮虫的净生殖率和种群内禀增长率均有极显著影响，但两者的交互作用对其无显著性影响。
Both temperature and sibling species affected markedly the net reproductive rate and intrinsic rate of population growth, but their interactions did not appear to be significant.
温度和姐妹种对轮虫的净生殖率和种群内禀增长率均有极显著影响，但两者的交互作用对其无显著性影响。
Both temperature and sibling species affected markedly the net reproductive rate and intrinsic rate of population growth, but their interactions did not appear to be significant.
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