Muskellunge Esox masquinongy are large piscivores stocked into numerous lakes in North America, but the potential effects of these stockings remains poorly understood. To investigate potential fish community changes associated with Muskellunge stocking, we contrasted catch per unit effort (CPUE) for seven fish species commonly found in Minnesota, along with mean weight for two predator species, before and after Muskellunge introduction in 36 lakes with that of paired reference lakes. Because of the known importance of Cisco Coregonus artedi as prey for Muskellunge, we also examined these data by separating the lakes into those with and without Cisco. Across all 36 lakes, we observed several significant differences between stocked and reference lakes. Yellow Perch Perca flavescent CPUE in gill nets were significantly higher after Muskellunge were introduced, as was mean weight for Northern Pike Esox lucius. Gill‐net CPUE for Northern Pike and White Sucker Catostomus commersonii were both lower following Muskellunge introduction. When subsets of lakes with and without Cisco were considered, results for the 21 lakes without Cisco were similar to the results of the entire set of lakes. In the 15 lakes with Cisco, the only significant result was lower Northern Pike CPUE after Muskellunge stocking. Our results are evidence that the introduction and management of Muskellunge in these lakes has not adversely affected game fish populations.

中文翻译：

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Muskellunge是否会影响引进鱼类的水域中的鱼类群落？对明尼苏达州Muskellunge水域存货的重新审查

Muskellunge Esox masquinongy是放养在北美众多湖泊中的大型食肉动物，但对这些放养的潜在影响仍知之甚少。为了调查与Muskellunge放养有关的潜在鱼类群落变化，我们对比了在明尼苏达州常见的7种鱼类的单位捕捞量（CPUE），以及在36个湖泊中引入Muskellunge的成对鱼类之前和之后的两种捕食物种的平均体重。参考湖泊。由于思科Coregonus artedi作为Muskellunge的猎物的众所周知的重要性，我们还通过将湖泊分为有无思科和无思科湖泊来检查了这些数据。在所有36个湖泊中，我们观察到种群湖泊和参考湖泊之间存在一些显着差异。黄鲈引入Muskellunge后，刺网中的Perca淡色CPUE明显升高，北派克Esox lucius的平均体重也是如此。在引入Muskellunge之后，用于北部派克和白色抽油烟的Catstomus commersonii的Gill-net CPUE均较低。当考虑有和没有思科的湖泊子集时，没有思科的21个湖泊的结果与整个湖泊的结果相似。在思科的15个湖泊中，唯一显着的结果是Muskellunge放养后北部派克CPUE降低。我们的结果证明，在这些湖泊中引入和管理Muskellunge并不会对野味鱼种群产生不利影响。