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1.通过对捕食者因饱食而导致其搜寻时间T_s减少的讨论,发展了捕食者对于猎物密度的功能反应模型。2、对于大个体猎物捕食者的饱食发生在每一次捕获到物借之后,T_s也因一系列的攻击循环中的攻击时间和消化暂停的时间而减少。对于小个体的猎物,捕食者在低猎物密度条件下会不停地觅食。其搜寻时间T_s只因突击时间而减少,如果猎物密度高,则捕食者的饱食发生在捕获到几个小个体的猎物之后,T_s因一系列觅食循环中的攻击时间和消化暂停而减少。3、通过把瓢虫成虫和幼虫的大食蚜虫量,同用实验估计的参数值预测的被猎物获量的极限值进行比较,验证了本文所描述的饱食模型。4、本文还根据处理时间(th)这一概念和一些瓢虫种类在生物防治申取得成功的几个例子讨论了捕食者因饱食而对猎物的捕食所受到的限制。
1. By discussing the reduction of the hunting time T_s of predators due to satiety, a functional response model of prey density to prey density was developed. 2. For a large individual prey, the predator’s satiation occurs after each capture, T_s is also reduced by the attack time and the digestion period in a series of attack cycles. For small individual prey, predators keep feeding at low prey density. The search time, T_s, decreases only by the raid time. If the prey density is high, the predator satiation occurs after capturing a few small prey, T_s decreases due to attack time and digestion pauses in a series of foraging cycles . By comparing the aphid populations of adults and larvae of the ladybugs with the predicted values of prey gain predicted by the experimentally estimated parameters, the satiation model described in this article is validated. 4. This article also discusses the limitations predators have on predator prey due to satiety based on the concept of processing time (th) and the success of some species of ladybugs in biological control.