几种蜘蛛对褐稻虱捕食功能反应的初步研究

ON THE FUNCTIONAL RESPONSES OF SOME SPIDERS TO BROWN PLANTHOPPER

稻田三种优势种蜘蛛的捕食功能反应是随猎物密度的增加而增大,并随其本身密度的增大而减小。成虫的捕食量均大于若虫。在同样条件下,拟环纹狼蛛捕食量最大,粽管巢蛛次之,食虫瘤胸蛛最小。数学模拟的理论值与实验观察值十分接近,经卡平方检验,差异不显著(P<0.05),可以描述蜘蛛捕食功能反应的情况。

The predation functional responses of three dominant spider species,i.e.Lycosa pseudoannulata,Clubiona japonicola,and Oedothorax insec-ticeps,in paddy field were increased with the density of prey,brownplanthopper Nilaparvata lugens,and decreased with its own density.The feeding amount of adult spider was more than those of nymphalspider,and was the largest in L.pseudoannulata,and the smallest inO.insecticeps.The prediction values of Holling's Ⅱ equation were close inon the observation values,the differences were insignificant by ChiSquare test.