摘要
在养虫室内群体饲养条件下,对印度瓜野螟种群动态的测定结果表明:第二代和第三代的种群内禀增长力(rm)分别为0.0792和0.0487,它们的累计产卵率随时间而表现出逻辑斯蒂曲线变化。在相同的生活和取食空间内,幼虫的发育速率和存活率随种群密度的增长而下降;每对成虫的每天产卵量随成虫密度的增加而递减,单对成虫密度下的产卵率比17对成虫密度下的产卵率高达18倍左右。
This paper deals with the life tables and the effects of different population density on the survival rate, the developmental rate and the ovipositional rate of the 2nd and 3rd generational xeperimental populations of Diaphania indica (Saunders). The results indicated that.
(1) the intrinsic rates of increase(rm) of its 2nd and 3rd generational experimental populational are 0.0792 and 0.0487, respectively.
( 2 ) its accumulated ovipositional rates hold S-type change forms as the ovipositional time.
( 3 ) the larval developmental rate, the larval survival rate and the adult ovipositional rate drop as the population density is increased.
关键词
印度瓜野螟
种群增长力
生命表
Indian cabbage moth, life table, intrinsic rate of natural increase, density dependence.
