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首页> 外文期刊>Comparative parasitology >Gut Helminth Composition in Newly Comigrating Light Geese (Lesser Snow Goose Chen caerulescens caerulescens and Ross' Goose Chen rossii)
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Gut Helminth Composition in Newly Comigrating Light Geese (Lesser Snow Goose Chen caerulescens caerulescens and Ross' Goose Chen rossii)

机译：Gut Helminth在新分配轻鹅（较小的雪雁陈Caerulescens Caerulescens和Ross'Goose Chen Rossii）

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Light geese (Chen caerulescens caerulescens and Chen rossii) have recently come into contact along a shared migration route. Parasite burdens were compared by examining the digestive tracts of 48 newly comigrating light geese (38 lesser snow geese and 10 Ross' geese) collected from 4 February to 3 March, 2012 during spring migration through central Illinois. Eight helminth taxa, including four species of Nematoda (Amidostomum sp., Epomidiostomum sp., Heterakis dispar, Trichostrongylus tenuis), two species of Trematoda (Echinostoma revolutum, Zygocotyle lunata), and two species of Cestoda (Cestoda sp. A, Cestoda sp. B), were recovered. Five of the eight helminth taxa were common in both species of host while Cestoda sp. B, Z. lunata, and E. revolutum were only found in lesser snow geese. Nematodes dominated assemblages, and all had a direct life cycle. Prevalences ranged from 22% (Amidostomum sp., C. rossii) to 100% (Epomidiostomum sp., C. c. caerulescens, T. tenuis, and C. rossii). Trematodes, which use an indirect life cycle, were relatively rare with a prevalence less than 10%. Host species and age showed significant effects on nematode composition whereas host sex had no effect. The prevalence of H. dispar was higher in adults than in juveniles for both species. Prevalence and mean intensity of T. tenuis was higher in Ross' geese than in lesser snow geese, and mean intensity was higher in juvenile than in adult Ross' geese. Patterns generally followed historic records, but infection levels were lower than previous reports from wintering and breeding ground surveys. While comigrating Ross' geese and lesser snow geese share similar parasite assemblages overall, multivariate analysis showed clear discrimination between species and with age, indicating that the recent shift in migration patterns has not resulted in a homogenization of their parasite communities.
机译：轻质鹅（陈凯塞斯Caerulescens和Chen Rossii）最近沿着共同的迁移路线接触。通过检查2012年2月4日至3月3日至3月3日的春季迁移到2012年3月4日至3月3日的新分配轻质鹅（38岁的雪雁和10枚Ross'Geese）的消化道进行了比较寄生虫。包括八个蠕虫分类群，包括四种墨西米多巴（Amidostomum sp。，ePomidiostomum sp。，heterakis dispar，trichostrongylus tenuis），两种雷丝（Echinostoma relontum，Zygocotyle lounata）和两种Cestoda（Cestoda sp.a，cestoda sp 。b），被恢复。在Cestoda sp的同时，八个蠕虫分类群中的五个常见的含量常见。 B，Z. Lunata和E. Revorutum仅在较小的雪雁中发现。 Nematodes主导组合，所有人都有一个直接的生命周期。患病率从22％（amidostomum sp.，c rossii）到100％（ePomidiostomum sp。，c c. c. c. caerulescens，T. Tenuis和C. Rossii）。使用间接生命周期的雷达曲线相对罕见，患病率小于10％。宿主物种和年龄对线虫组成显示出显着影响，而宿主性没有效果。 H. Dispar的患病率在成人中较高，而不是两种物种的青少年。罗斯鹅的患病率和平均强度高于较小的雪雁，少年的平均强度高于成人罗斯的鹅。模式普遍遵循历史记录，但感染水平低于越冬和育种地面调查的先前报告。在分配罗斯的鹅和较小的雪地享有类似的寄生虫总体上，多元分析显示物种与年龄的明显歧视，表明迁移模式的最近转变并未导致其寄生虫社区的均质化。

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