大眼隐翅虫对萝卜蚜捕食功能反应与寻找效应研究

Studies on the predatory functional response and searching efficiencyof Stenus(Stenus,s.str.)sp.1 on Lipaphis erysimi Kaltenbach

在室内条件下,对大眼隐翅虫Stenus(Stenus,s str )sp 1成虫对萝卜蚜Lipaphiserysimi(Kaltenbach)的捕食作用及寻找效应进行了定量研究,结果表明大眼隐翅虫对萝卜蚜的功能反应符合HollingⅡ型模型,理论方程为Na=0 7937N/(1+0 1582N),日最大捕食量为5 018头.大眼隐翅虫寻找效应随自身密度增加而降低,其数学模型为α=6 0131P-0 6254,其捕食作用与个体间相互干扰作用关系用Hassell模型拟合为E=0 2530P-0 1468.

Predation of Stenus(Stenus,s.str.)sp.1 on Lipaphis erysimi Kaltenbach was quantitatively investigated in the laboratory.The functional response of adult Stenus(Stenus,s.str.)sp.1 to L.erysimi Kaltenbach could be described by HollingⅡ model.The disc equation is Na=0.793?7?N/(1+0.158?2?N).The daily maximum predation of L.erysimi Kaltenbach by Stenus(Stenus,s.str.)sp.1 are 5.018.The searching efficiency decreased with increase of predator density,and the mathe-matical model is:E=6.013?1?P^(-0.625?4),while the relationship between predation efficiency and individual interference could be fitted with Hassell model,E=0.253?0?P^(-0.146?8).