Keymer A E, Anderson R M
Parasitology. 1979 Oct;79(2):195-207. doi: 10.1017/s0031182000053282.
The mean parasite burden of a population of Tribolium confusum is shown to rise to a plateau as the exposure density of infective eggs of Hymenolepis diminuta increases. The level of this plateau is shown to be dependent on the nutritional status of the host population, being depressed from approximately 18 cysticeroids/beetle in hosts which have been starved prior to experimentation, to approximately 2 cysticercoids/beetle in satiated hosts. A simple model is used to describe the shape of this infection functional response in terms of the predator-prey interaction between hosts (T. confusum) and parasite infective stages (H. diminuta eggs). The distribution of successful infections/host is shown to be over-dispersed, even when hosts are exposed to infective stages arranged in a uniform spatial pattern. The over-dispersion of parasite numbers/host is shown to become more severe as the spatial pattern of infective stages changes from under-dispersed, through random, to over-dispersed. Experimental results are discussed in relation to the dynamics of parasite-host interactions, in which infection takes place by host ingestion of a free-living infective stage.
随着微小膜壳绦虫感染性虫卵暴露密度的增加，杂拟谷盗群体的平均寄生虫负荷会上升至一个平台期。该平台期的水平取决于宿主群体的营养状况，在实验前饥饿的宿主中，该水平从约18个似囊尾蚴/甲虫降至饱食宿主中的约2个似囊尾蚴/甲虫。一个简单的模型被用来根据宿主（杂拟谷盗）与寄生虫感染阶段（微小膜壳绦虫虫卵）之间的捕食者 - 猎物相互作用来描述这种感染功能反应的形状。即使宿主暴露于以均匀空间模式排列的感染阶段，成功感染/宿主的分布仍显示为过度分散。随着感染阶段的空间模式从分布不足、随机分布到过度分散变化，寄生虫数量/宿主的过度分散变得更加严重。实验结果结合寄生虫 - 宿主相互作用的动态进行了讨论，其中感染是通过宿主摄入自由生活的感染阶段发生的。
