Steele Jillian, Orsel Karin, Cuyler Christine, Hoberg Eric P, Schmidt Niels M, Kutz Susan J
Faculty of Veterinary Medicine, University of Calgary, HSC 2530, 2500 University Drive NW, Calgary, AB, Canada T2N 1N4.
Greenland Institute of Natural Resources, P.O. Box 570, 3900 Nuuk, Greenland.
Int J Parasitol Parasites Wildl. 2013 Jun 2;2:197-202. doi: 10.1016/j.ijppaw.2013.05.002. eCollection 2013 Dec.
Gastrointestinal parasite diversity was characterised for two adjacent populations of west Greenland caribou (Rangifer tarandus groenlandicus) through examinations of abomasa and small intestines collected from adult and subadult females during late winter. Three trichostrongyline (Trichostrongylina: Nematoda) species were identified from the abomasa, although none were recovered from the small intestines, with faunal composition differing between the caribou populations. In caribou from Kangerlussuaq-Sisimiut, Marshallagia marshalli and Teladorsagia boreoarcticus were highly prevalent at 100% and 94.1%, respectively. In contrast, Ostertagia gruehneri was found at 100% prevalence in Akia-Maniitsoq caribou, and was the only abomasal parasite species present in that population. We hypothesise that parasite faunal differences between the populations are a consequence of parasite loss during caribou colonisation of the region approximately 4000-7000 years ago, followed by a more recent spill-over of parasites from muskoxen (Ovibos moschatus wardi) and semi-domesticated Norwegian reindeer (Rangifer tarandus tarandus) introduced to Kangerlussuaq-Sisimiut and Akia-Maniitsoq regions, respectively, in the 20th century.
通过对冬末采集的成年和亚成年雌性西格陵兰驯鹿（Rangifer tarandus groenlandicus）的皱胃和小肠进行检查，对两个相邻种群的胃肠道寄生虫多样性进行了表征。从皱胃中鉴定出三种毛圆线虫（毛圆线虫亚目：线虫纲），尽管在小肠中未发现，两个驯鹿种群的动物区系组成有所不同。在康克鲁斯瓦格-西西缪特的驯鹿中，马氏马歇尔线虫和北方细颈线虫的感染率很高，分别为100%和94.1%。相比之下，格氏奥斯特线虫在阿基亚-马尼图萨克驯鹿中的感染率为100%，是该种群中唯一存在的皱胃寄生虫种类。我们推测，两个种群之间寄生虫动物区系的差异是大约4000 - 7000年前驯鹿在该地区定居期间寄生虫损失的结果，随后在20世纪，分别引入到康克鲁斯瓦格-西西缪特和阿基亚-马尼图萨克地区的麝牛（Ovibos moschatus wardi）和半驯化的挪威驯鹿（Rangifer tarandus tarandus）的寄生虫出现了更近的溢出。
