Summary This study presents the helminthological data on three mustelid species with overlapping ecological niches in Lithuania. In general, 14 helminth species or higher taxa were reported from all mustelids: Isthmiophora melis, Strigea strigis metacercariae, Pseudamphistomum truncatum, Alaria alata mesocercariae, Phyllodistomum folium, Opisthorchis felineus, Metametorchis skrjabini, Mesocestoides sp., Taenia martis, Aonchotheca putorii, Crenosoma schachmatovae, Eucoleus aerophilus, Molineus patens, and Nematoda g. sp. The largest number of helminths was detected in M. putorius (11) and N. vison (10) from wetlands; 7 helminths were detected in M. putorius from forests, and 8 in N. vison and 4 in L. lutra from water bodies. Habitat-related differences were found in the abundance and prevalence of E. aerophilus in M. putorius. M. putorius has higher indices of infection by I. melis, S. strigis metacercariae, and E. aerophilus compared to N. vison in wetlands. Differences in the abundance and prevalence of P. truncatum among N. vison and L. lutra in water bodies have been observed. Helminths detected in N. vison in the present study are native European parasites.

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具有重叠生态位的鼬类蠕虫：欧亚水獭 Lutra lutra（Linnaeus，1758 年）、美国水貂 Neovison vison Schreber，1777 年和欧洲野猫 Mustela putorius Linnaeus，1758 年

总结 本研究提供了立陶宛具有重叠生态位的三种鼬科动物的蠕虫学数据。总的来说，从所有鼬科动物中报告了 14 种蠕虫或更高的分类群：Isthmiophora melis、Strrigea strigis metacercariae、Pseudamphistomum truncatum、Alaria alata mesocercariae、Phyllodistomum folium、Opisthorchis felineus、Apisthorchis felineus、Metametorchisscheisskaya、Treametorchides、Treametorchides、Pseudamphistomum truncatum。 、Eucoleus aerophilus、Molineus patens 和 Nematoda g。sp. 在湿地的 M. putorius (11) 和 N. vison (10) 中检测到的蠕虫数量最多；在森林中的 M. putorius 中检测到 7 种蠕虫，在 N. vison 中检测到 8 种，在水体中在 L. lutra 中检测到 4 种。在 M. putorius 中的 E. aerophilus 的丰度和流行率中发现了与栖息地相关的差异。M。与湿地中的 N. vison 相比，putorius 感染 I. melis、S. strigis metacercariae 和 E. aerophilus 的指数更高。已观察到水体中 N. vison 和 L. lutra 之间 P. truncatum 的丰度和流行率存在差异。本研究中在 N. vison 中检测到的蠕虫是欧洲本土寄生虫。