Purpose

The present study investigates the fish parasite fauna from Lake Tollense, Mecklenburg-Western Pomerania, Germany.

Methods

A total of 117 perch (Perca fluviatilis), bream (Abramis brama) and roach (Rutilus rutilus) were sampled for parasites during 2018 and 2019 from Lake Tollense and compared with earlier data from Lake Malchin and Lake Hohen Sprenz in 2011 and 2014, respectively. Parasites were identified based on morphological and molecular characters.

Results

A total of 32 parasite species were isolated from fishes of Lake Tollense, predominated by digeneans. Diplostomum baeri was found only in perch while D. spathacaeum was isolated from bream and roach. Parasite comparison of similar hosts between lakes revealed highly abundant Ichthyocotylurus spp. in perch and bream of Lake Malchin while Aspidogaster limacoides was most common in roach from Lake Tollense. Diversity indices of roach showed significant variation between localities. However, NMDS graph revealed separation of the three freshwater habitats based on the parasite fauna of perch, bream and roach.

Conclusion

Based on the multivariate statistical analysis, the three natural inland water bodies could be distinguished based on the parasite communities of perch, bream and roach. The potential to utilise fish parasites as biological indicators in freshwater ecosystem is discussed.

中文翻译：

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德国梅克伦堡-前波美拉尼亚三个不同营养状态湖泊的鱼类寄生虫群落

目的

本研究调查了德国梅克伦堡-前波美拉尼亚托伦斯湖的鱼类寄生虫动物群。

方法

2018 年和 2019 年期间，从 Tollense 湖对 117 条鲈鱼 ( Perca fluviatilis )、鲷鱼 ( Abramis brama ) 和蟑螂 ( Rutilus rut​​ilus ) 进行了寄生虫采样，并分别与 2011 年和 2014 年马尔钦湖和霍恩斯普伦茨湖的早期数据进行了比较. 根据形态和分子特征鉴定寄生虫。

结果

从 Tollense 湖的鱼类中分离出共有 32 种寄生虫，主要是 Digeneans。Diplostomum baeri仅在鲈鱼中发现，而D. spathacaeum则从鲷鱼和蟑螂中分离出来。湖泊之间相似宿主的寄生虫比较揭示了高度丰富的Ichthyocotylurus spp。在马尔钦湖的鲈鱼和鲷鱼中，而在Tollense湖的蟑螂中最常见的是Aspidogaster limacoides 。蟑螂的多样性指数显示出地区之间的显着差异。然而，NMDS 图显示了基于鲈鱼、鲷鱼和蟑螂的寄生虫动物群的三个淡水栖息地的分离。

结论

基于多变量统计分析，可以根据鲈鱼、鲷鱼和蟑螂的寄生虫群落区分三个天然内陆水体。讨论了利用鱼类寄生虫作为淡水生态系统生物指标的潜力。