Blower S M, Roughgarden J
Department of Biological Sciences, Stanford University, 94305, Stanford, CA.
Oecologia. 1988 May;75(4):512-515. doi: 10.1007/BF00776413.
This study investigates host-parasite population dynamics in a marine intertidal community of three barnacle host species (Balanus glandula, Chthamalus fissus andC. dalli). Our paper addresses the following questions: (1) Does prevalence (percentage parasitism) differ among the three host species? (2) What are the spatial and temporal population dynamics within the community? and (3) Does the parasite exhibit size-selective behaviour in any of the three host species? Significant differences in prevalence were found among the three host species; the parasitic castrator (Hemioniscus balani) most heavily infected the least abundant host. Parasitism occurred throughout the year and also showed significant spatial variation.H. balani showed size-selective parasitism inC. fissus, but not inC. dalli. Consequently, the population effects of parasitic castration inC. fissus depend both upon the host population size structure and the intensity of the parasite's size-selectivity.
本研究调查了由三种藤壶宿主物种（腺藤壶、裂纹小藤壶和达氏小藤壶）组成的海洋潮间带群落中的宿主 - 寄生虫种群动态。我们的论文探讨了以下问题：（1）三种宿主物种之间的感染率（寄生百分比）是否存在差异？（2）群落内的空间和时间种群动态是怎样的？以及（3）寄生虫在三种宿主物种中的任何一种中是否表现出大小选择行为？研究发现三种宿主物种之间的感染率存在显著差异；寄生性去势者（巴氏半海虱）对数量最少的宿主感染最为严重。寄生现象全年都有发生，并且还表现出显著的空间变化。巴氏半海虱在裂纹小藤壶中表现出大小选择寄生行为，但在达氏小藤壶中没有。因此，裂纹小藤壶中寄生性去势的种群效应既取决于宿主种群的大小结构，也取决于寄生虫大小选择的强度。
