Impacts of selective predation on infection prevalence and host susceptibility

Predation can alter diverse ecological processes, including host–parasite interactions. Selective predation, whereby predators preferentially feed on certain prey types, can affect prey density and selective pressures. Studies on selective predation in infected populations have primarily focused on predators preferentially feeding on infected prey. However, there is substantial evidence that some predators preferentially consume uninfected individuals. Such different strategies of prey selectivity likely modulate host–parasite interactions, changing the fitness payoffs both for hosts and their parasites. Here we investigated the effects of different types of selective predation on infection dynamics and host evolution. We used a host–parasite system in the laboratory (Daphnia dentifera infected with the horizontally transmitted fungus, Metschnikowia bicuspidata) to artificially manipulate selective predation by removing infected, uninfected, or randomly selected prey over approximately ..., , , For the data files associated with the manuscript \"Selective predation can impact infection prevalence and host susceptibility\" by S.O. Gutierrez, X.E. Bernal, and C.L. Searle. Description of data files: Population_data_Gutierrez_etal Susceptibility_data_Gutierrez_etal Length_data_Gutierrez_etal For the file: \"Population_data_Gutierrez_etal.\" These data are from the weekly sampling of the populations during the \"population experiment\" portion of the project. Beaker = replicate number Sample_num = the week each sample was taken Predation = the selective predation treatment where \"Infected\" = infected individuals were removed, \"Uninfected\" = uninfected individuals were removed, and \"Random\" = both infected and uninfected individuals were removed *Adult_F = uninfected adult female *Ephi_F = uninfected adult female carrying an ephippium (resting egg) *Juv_F = uninfected juvenile female *Ad_M = uninfected adult male *Juv_M = uninfected juvenile male *Inf_Ad_F = infected adult female *Inf_E...捕食作用可改变多种生态过程，包括宿主-寄生虫相互作用（host–parasite interactions）。选择性捕食（selective predation）指捕食者优先取食特定猎物类群的行为，可影响猎物密度（prey density）与选择压力（selective pressures）。目前针对感染种群中选择性捕食的研究，主要聚焦于捕食者优先取食感染个体的情形。但已有大量证据表明，部分捕食者会优先捕食未感染个体。这类不同的猎物选择策略，可能会调控宿主-寄生虫相互作用，改变宿主与寄生虫双方的适合度收益（fitness payoffs）。本研究探讨了不同类型的选择性捕食对感染动态（infection dynamics）与宿主演化（host evolution）的影响。我们以实验室条件下的宿主-寄生虫系统——齿突溞（Daphnia dentifera）感染水平传播（horizontally transmitted）真菌两歧梅奇酵母（Metschnikowia bicuspidata）——为研究对象，通过移除感染个体、未感染个体或随机选取猎物的方式，人工操控选择性捕食，实验周期约为……。本数据集关联于S.O. Gutierrez、X.E. Bernal与C.L. Searle撰写的手稿《选择性捕食可影响感染率与宿主易感性》（Selective predation can impact infection prevalence and host susceptibility）。 数据集文件说明： Population_data_Gutierrez_etal Susceptibility_data_Gutierrez_etal Length_data_Gutierrez_etal 针对Population_data_Gutierrez_etal文件：该数据集源自本研究「种群实验」模块的种群每周采样结果。其中： Beaker（重复实验序号）：代表重复培养单元编号； Sample_num（采样周次）：代表采样所属的实验周数； Predation（捕食处理组）：为选择性捕食处理组别，其中"Infected"组为移除感染个体组，"Uninfected"组为移除未感染个体组，"Random"组为随机移除感染与未感染个体组。 *Adult_F：未感染成年雌性个体 *Ephi_F：携带休眠卵囊（ephippium, resting egg）的未感染成年雌性个体 *Juv_F：未感染幼年雌性个体 *Ad_M：未感染成年雄性个体 *Juv_M：未感染幼年雄性个体 *Inf_Ad_F：感染成年雌性个体 *Inf_E……