龟纹瓢虫对烟蚜的捕食功能反应及寻找效应

THE PREDATORY FUNCTIONAL RESPONSE AND SEARCHING EFFICIENCY OF PROPYLAEA JAPONICA (THUNBERG) ON MYZUS PERSICAE (SULZER)

龟纹瓢虫雌虫和雄虫对烟蚜的功能反应符合 Holling II型模型 ,其模型分别为 Na=0 .835 0 N/(1+0 .0 10 4 N)和 Na=0 .92 2 6 N/(1+ 0 .16 0 1N) ,瓢虫捕食烟蚜的数量随烟蚜密度地增加而增加 ,但寻找效应随烟蚜密度地增加而降低。雌虫和雄虫的日最大捕食量和最佳寻找密度分别为 4 2 .0 9、38.6 7头和 7.75、7.31头。龟纹瓢虫寻找效应随自身密度地增加而降低 ,雌、雄虫的数学模型分别为 E=0 .372 9P-1.612 3和 E=0 .36 80 P-1.5786。雌、雄以及雌雄混合种群干扰反应的数学模型分别为 E=0 .84 6 6 P-2 .1892 、E=0 .7377P-2 .2 785和 E= 0 .6 118P-2 .173 4。

The functional response models that female and male Propylea japonica preyed on Myzus persicae (Sulzer) were Na=0.8350/(1+0.0104N) and Na=0.9226/(1+0.1601) respectively. Relationship between the amounts of aphid preyed by coccinellid and aphid density showed a negative accelerative curve. The daily maximum number of aphid preyed theoretically by the female and male adult cocconellid were 42.09 and 38.67 aphids respectively. The searching efficiency decreased with the increase of predator density, and the female and male's mathematical models were E=0.3729P-1.6123 and E=0.3680P-1.5786 respectively. The mutual interference of female, male and female and male mixed population among individual predators and preys could described by Hassell and Vasley's equation were E=0.8466P-2.1892, E=0.7377P-2.2785 and E=0.6118P-2.1734 respectively.