Sorensen T C, Moses R A
Department of Biological Sciences, University of Alberta, Edmonton, Canada.
J Parasitol. 1998 Oct;84(5):902-6.
We examined host preferences and temporal trends of the tick Ixodes angustus on small mammals in north-central Alberta. Small mammals were live-trapped from 1 June to 29 September 1994 and 3 May to 30 June 1995 in mature aspen (Populus tremuloides) forest near Lac La Biche, Alberta. Abundance of female I. angustus was high in early May (0.90 +/- 0.20 [SE]) and peaked again in late June (0.58 +/- 0.16), whereas abundance of immature I. angustus peaked (1.2 +/- 0.35) in mid-July. Red-backed voles (Clethrionomys gapperi) and deer mice (Peromyscus maniculatus) were the most common host species encountered, and tick abundance (number of ticks per animal examined) on these hosts was strongly influenced by species and sex. Clethrionomys gapperi had higher tick abundance (0.73 +/- 0.07) than did P. maniculatus (0.04 +/- 0.01), and ticks were more abundant on large male C. gapperi (0.97 +/- 0.14) than they were on large female C. gapperi (0.36 +/- 0.08; P = 0.0007). Characteristics of each species and sex of host in relation to susceptibility to parasitism are discussed.
我们研究了阿尔伯塔省中北部小型哺乳动物上狭翅硬蜱的宿主偏好和时间趋势。1994年6月1日至9月29日以及1995年5月3日至6月30日，在阿尔伯塔拉布歇湖附近的成熟白杨（颤杨）林中，通过活捉捕获小型哺乳动物。5月初，雌性狭翅硬蜱的数量较多（0.90±0.20[标准误]），6月下旬再次达到峰值（0.58±0.16），而未成熟狭翅硬蜱的数量在7月中旬达到峰值（1.2±0.35）。红背田鼠（棕背䶄）和鹿鼠（北美鹿鼠）是最常见的宿主物种，这些宿主上的蜱虫数量（每只检查动物的蜱虫数量）受物种和性别的强烈影响。棕背䶄的蜱虫数量（0.73±0.07）高于北美鹿鼠（0.04±0.01），并且大型雄性棕背䶄身上的蜱虫比大型雌性棕背䶄身上的蜱虫更丰富（0.97±0.14比0.36±0.08；P = 0.0007）。讨论了每种宿主物种和性别的特征与寄生虫易感性的关系。
