摘要
萝卜蚜(Lipaphis erysimi Kalt.)发育速度、内禀增长力与温度的关系符合下述模型: V(T)=K/{1+exp[—r(T—T_0)]}*{1—exp[—(T—T_1)/δ]}*{1—exp(-(Th-T)/δ]}其发育最适温度为16—23℃,世代发育起点(Tl)为3.79℃,最高临界温度(Th)为33.81℃。内禀增长力(r_m)最合适的温度是19.64℃。 组建了五种温度下萝卜蚜的生命表。用改进的Weibull模型模拟了萝卜蚜个体存活率的变化。其下降最快的位置随温度降低而后延,下降的速度随温度降低而减慢,造成寿命延长。蚜虫的繁殖活动主要集中在成虫的早期阶段。因此早期最佳育龄成虫的数量对整个种群数量变动具有重要的意义。
The relationship between development rate, the innate capacity of increase of mustard aphid and temperature fit to the model:The optimum development temperature is from 16 to 23℃, the development zero (TL) of mustard aphid is 3.79℃. The highest threshold temperature (Th) for development is 33.81℃. The optimum temperature for the innate capacity of increase(rm) is 19.64℃.The life tables of mustard aphid at 5 levels of temperature were set up. The change in survival rale of mustard aphid individuals was sumulated by modified model of Weibull. The quickest fall location of survival rate is delayed and falling velocity of survival rate is decelerated v ith temperature fall that result in a prolonged life. The reproduction of the aphid are mainly in the early stage of adult. It was sho ed that the number of adult having optimum reproduction age at early stage is much important for population dynamics.
出处
《生态学报》
CAS
CSCD
北大核心
1990年第3期208-212,共5页
Acta Ecologica Sinica
关键词
萝卜蚜
种群参数
温度
mustard aphid, survival rate, developmcnl rate, the innate capacity of increase, life table, Weibull-function.
