The ichthyological biodiversity of Polish lakes is poorly understood, even in lakes not used for fishing and those under strict protection. With this in mind, the aim of this study was to conduct a comprehensive ichthyological survey of several lakes in the Wolin National Park (Poland). The study was conducted in Domysławskie and Gardno lakes and the anthropogenic Stara Kredownia reservoir. Each fishing exercise was conducted using benthic nets over a 12 h period. The fish caught were measured and weighed, and the species identified. Shannon-Wiener (H) and Simpson biodiversity indices were determined. The catch comprised a total of 4580 fish (of which 4391 were caught in Domysławskie Lake) belonging to 15 species, with a combined weight of 98,165 g. In general, the most prevalent species were non-predatory fish: roach (Rutilus rutilus), freshwater bream (Abramis brama), white bream (Blicca bioerkna), bleak (Alburnus alburnus), and rudd (Scardinius erythrophthalmus). Individually, perch (Perca fluviatilis) and roach (Rutilus rutilus) were the most abundant species. Ichthyofauna diversity varied greatly between the studied water bodies, with 15 species found in Domysławskie Lake and only 6 species in Gardno Lake. In Stara Kredownia Reservoir, no fish were caught, but amphibians were observed, such as great crested newts (Triturus cristatus) and common newts (Lissotriton vulgaris). Based on the results obtained, Lake Domysławskie had a higher species ichthyofauna diversity than the other ‘tench and pike’ lakes. Gardno Lake had a much lower biodiversity.

中文翻译：

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评估 Wolin 国家公园（波兰）严格保护区内非商业用途湖泊中鱼类的组成

人们对波兰湖泊的鱼类生物多样性知之甚少，即使在不用于捕鱼和受到严格保护的湖泊中也是如此。考虑到这一点，本研究的目的是对沃林国家公园（波兰）的几个湖泊进行全面的鱼类学调查。该研究是在 Domysławskie 和 Gardno 湖以及人为的 Stara Kredownia 水库中进行的。每次捕鱼活动均使用底栖网进行，持续 12 小时。对捕获的鱼进行测量和称重，并确定了物种。香农-维纳 (H) 和辛普森生物多样性指数被确定。捕获的鱼共 4580 条（其中多米斯瓦夫斯基湖捕获了 4391 条），属于 15 个物种，总重量为 98,165 克。一般来说，最普遍的物种是非捕食性鱼类：蟑螂（Rutilus rut​​ilus )、淡水鲷鱼 ( Abramis brama )、白鲷 ( Blicca bioerkna )、黯淡 ( Alburnus alburnus ) 和 rudd ( Scardinius erythrophthalmus )。个别地，鲈鱼（Perca fluviatilis）和蟑螂（Rutilus rut​​ilus）是最丰富的物种。研究的水体之间的鱼群多样性差异很大，在多米斯瓦夫斯基湖发现了 15 种，在加德诺湖中发现了 6 种。在 Stara Kredownia 水库，没有捕到鱼，但观察到两栖动物，如大凤头蝾螈（Triturus cristatus）和普通蝾螈（Lissotriton vulgaris）。根据获得的结果，多米斯瓦夫斯基湖的鱼类物种多样性高于其他“丁鱼和梭鱼”湖泊。加德诺湖的生物多样性要低得多。