Purpose

The study aims to characterise and compare the helminth assemblages and helminth infracommunities in the marsh frog, Pelophylax ridibundus and the edible frog, P. esculentus collected in the northern part of Ukraine.

Methods

Occurrence and abundance of the helminths were analysed by calculating the prevalence, intensity, and mean abundance of infection; similarities between the infracommunities were estimated by the Bray–Curtis index and visualised using nMDS plots. Dissimilarities were estimated using the ANOSIM and SIMPER routines.

Results

In total, 27 helminth species were found in 143 frogs. Pelophylax ridibundus (n = 86) harboured 20 species of helminths, 24 species were found in P. esculentus (n = 57), and 17 species were shared by the two hosts. Oswaldocruzia bialata and larval Strigea sp. were absent in P. ridibundus, while they reached the prevalence of 30% and 10%, respectively, in P. esculentus. Cosmocerca ornata, Diplodiscus subclavatus, Opisthioglyphe ranae, and Codonocephalus urniger had significantly larger prevalence in P. ridibundus, whereas Haematoloechus asper was found to be more prevalent in P. esculentus. Acanthocephalus ranae, Icosiella neglecta, Haematoloechus variegatus, Pleurogenes claviger, Pleurogenoides medians, and Prosotocus confusus were equally common in both hosts. Helminth infracommunities in the two hosts had identical species richness (1–10 species, 4 on average); abundance was significantly higher in P. ridibundus.

Conclusions

Helminth assemblages of the two hosts in northern Ukraine are rather similar; however, small but significant differences were found in their species composition, parameters of infection in some species, and structure of helminth infracommunities.

中文翻译：

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乌克兰北部青蛙Pelophylax ridibundus和P. esculentus（两栖动物：Ranidae）的蠕虫种类和次生物。

目的

这项研究旨在表征和比较沼泽青蛙Pelophylax ridibundus和可食用青蛙P中的蠕虫组合和蠕虫亚种。esculentus收集在乌克兰北部。

方法

通过计算感染的发生率，强度和平均丰度来分析蠕虫的发生和丰度。Bray-Curtis指数估算了亚族之间的相似性，并使用nMDS图进行了可视化。使用ANOSIM和SIMPER例程估计差异。

结果

总共在143只青蛙中发现了27种蠕虫。rideloundus兜风（n  = 86）藏有20种蠕虫，其中P发现24种。esculentus（n  = 57），两个寄主共有17种。Oswaldocruzia bialata和幼虫Strigea sp。P. ridibundus中不存在，而它们在P中分别达到30％和10％的患病率。esculentus。Cosmocerca ornata，Diplodiscus subclavatus，Opisthioglyphe ranae和Codonocephalus urniger曾在显著更大流行P. ridibundus，而Haematoloechus续断被发现是在更普遍P。esculentus。Acanthocephalus蟆油，Icosiella neglecta，Haematoloechus粘多糖，Pleurogenes claviger，Pleurogenoides中位数和Prosotocus confusus分别在两台主机上同样常见。两种寄主中的蠕虫次生种群具有相同的物种丰富度（1-10种，平均4种）。ridibundus中的丰度显着较高。

结论

乌克兰北部的两个东道主的蠕虫组合非常相似。但是，在它们的物种组成，某些物种的感染参数以及蠕虫次生群落的结构上发现了微小但显着的差异。