黑带食蚜蝇对烟蚜的捕食功能反应及寻找效应

黑带食蚜蝇若虫对烟蚜的功能反应符合Holling Ⅱ型,其雌雄模型分别为Na=0.7616N/(1十0.0076N)和Na=0.6911N/(1+0.072N),食蚜蝇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46.76、43.45头和20.00、20.24头。黑带食蚜蝇寻找效应随自身密度地增加而降低,雌、雄若虫的数学模型分别为E=100.9567P~(-0.8450)和E=98.7846P~(P-0.8086)。雌、雄以及雌雄混合种群干扰反应的数学模型分别为E=26.9776P~(P-0.2198)、E=25.0311P~(-0.1773)和E=23.4271P~(-0.1505)。

THE PREDATORY FUNCTIONAL RESPONSE AND SEARCHING EFFICIENCY OF EPISYRPHUS BALTEATUS (DE GEER) ON MYZUS PERSICAE (SULZER)

The functional response models that female and male larvae of Episyrphus balteatus (De Geer) preyed on Myzus persicae (Sulzer) were Na=0.7616N/(1+0.0076N) and Na=0.6911N/(1+0.072N), respectively. Relationship between the amounts of aphid preyed by syrphid and aphid density showed a negative accelerative curve. The daily maximum number of aphid preyed theoretically by the female and male larvae syrphid were 46.76 and 43.45 aphids, respectively. The searching efficiency decreased with the increase of predator density, and the female and male's mathematical models were E=100.9567P~(-0.8450) and E=98.7846P~(-0.8086), 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=26.9776P~(-0.2198), E=25.0311P~(-0.1773) and E=23.4271P~(-0.1505), respectively.