普通肉食螨对椭圆食粉螨的捕食功能

Predation of Cheyletus eruditus on Aleuroglyphus ovatus

在6个恒温下研究普通肉食螨Cheyletus eruditus(Schrank)不同螨态对椭圆食粉螨Aleuroglyphus ovatus(Troupeau)的功能反应。结果表明,普通肉食螨不同螨态对椭圆食粉螨的功能反应均属于HollingⅡ型,其中雌成螨的捕食能力最强,其次是雄螨、若螨、幼螨;在各温度处理中,雌成螨在28℃时具有较高的捕食功能;普通肉食螨在16℃的低温状态下捕食功能很低,仅有雌螨对猎物有捕食行为;在猎物密度不变的情况下,普通肉食螨捕食猎物的数量随自身密度的增加而下降。

The predation of Cheyletus eruditus （Schrank） on Aleuroglyphus ovatus （Troupeau） was studied at 6 constant temperatures. The resuhs showed that all functional response of C. eruditus in different developmental stages to A. ovatus can be described as Holling Ⅱ type. Among all stages and temperatures, female adult was the most efficient predatory stage at 28℃, Only female adult preyed on A. ovatus at 16℃. The density of predator affected the predatory ratio, in which the number of predation was slowly decreased with the increased density of predator.