柞蚕卵繁殖赤眼蜂实验种群生命表的编制与分析

Establishment and analysis of laboratory population life table of Trichogramma dendrolimi developed on Antherea pernyi eggs

通过解剖柞蚕卵统计赤眼蜂幼期存活率与生殖力数据的方法 ,编制了松毛虫赤眼蜂在柞蚕卵上繁殖的实验种群生命表 .松毛虫赤眼蜂在柞蚕卵上的单雌平均产卵量为 86 .15粒 ,赤眼蜂的卵、幼虫、蛹的各期存活率分别为 1.0 0、0 .9186、0 .8895 ;羽化率为 0 .86 6 8;种群趋势指数I为 5 4 .4 8.可见 ,大卵 (柞蚕卵 )繁蜂与小卵 (如米蛾卵 )繁蜂不同 ,大卵繁蜂时的幼期死亡率接近 30 % ,是一个不可忽视的因素 .文中还讨论了净生殖力R0 、I、内禀增长率rm3个重要生命表参数计算及其相互关系 ,认为R0 和I在生物学意义上相同 ,由I值也可计算rm.

The laboratory population life table of Trichogramma dendrolimi Matsumura developed on the eggs of Antherea pernyi was established by calculating the survival rate at immature stage and the adult reproduction.The survival rate of egg, larval and pupa was 1.00,0.9186 and 0.8895, respectively,and the emergence rate of pupa was 0.8668 .The total mortality rate at immature stage reached to 30%, which was a great difference from those developed on small host eggs .Each Trichogramma female could lay about 86 eggs on one Antherea pernyi egg.The index of Trichogramma population trend was 54.48.Analysis on the relationships among intrinsic rate of natural increase (r m), net production rate (R 0) and index of population trend (I) showed that the R 0 and I had the same biological meaning, and r m could be calculated with I value.