Radomski A A, Pence D B
Department of Pathology, Texas Tech University Health Sciences Center, Lubbock 79430.
J Parasitol. 1993 Jun;79(3):371-8.
The persistence and interrelationships of a recurrent group of intestinal helminth species in a coyote population from southern Texas were determined; data were collected at 4-yr intervals (1979, 1983, and 1987). The a priori expectation was that a defined recurrent group of helminth species persisted over time and that the respective helminth species were stable in terms of their abundances. The Fager index and subsequent recurrent group analysis indicated a small group of taxonomically unrelated recurring species of helminths that always demonstrated affinities with each other and occasionally with certain of the remaining species. Although there were differences across host subpopulations delineated by sex and age, temporal changes reflective of extrinsic environmental variables acting on certain helminth species appeared to have the greatest effect on recurrent group size and structure. Three of the 8 common intestinal helminth species (Ancylostoma caninum, Oncicola canis, and Alaria marcianae) occurred in all recurrent groups. Thus, there was temporal persistence of a small recurrent group of dominant helminth species that formed the basis of the intestinal helminth community in this coyote population.
确定了得克萨斯州南部郊狼种群中一组反复出现的肠道蠕虫物种的持续性及其相互关系；数据每隔4年收集一次（1979年、1983年和1987年）。先验预期是一组特定的反复出现的蠕虫物种随时间持续存在，且各蠕虫物种在丰度方面保持稳定。法格指数及后续的反复出现群组分析表明，一小群分类学上不相关的反复出现的蠕虫物种总是彼此表现出亲和性，偶尔也与其余某些物种表现出亲和性。尽管按性别和年龄划分的宿主亚群之间存在差异，但反映作用于某些蠕虫物种的外部环境变量的时间变化似乎对反复出现群组的大小和结构影响最大。8种常见肠道蠕虫物种中的3种（犬钩口线虫、犬圆线虫和马氏并殖吸虫）出现在所有反复出现的群组中。因此，一小群占主导地位的蠕虫物种存在时间上的持续性，它们构成了该郊狼种群肠道蠕虫群落的基础。
