Many inland fisheries are supported by stocking hatchery‐produced fish, and fisheries managers often face difficult decisions regarding strain selection. Stocking evaluations that are designed to quantify differences in strain performance provide valuable data for designing stocking programs. Here, we used genetic tools to investigate the capture rate of two strains of Muskellunge that were stocked in Wisconsin lakes. We genotyped a total of 1,011 Muskellunge at 13 microsatellites and used the data from five reference populations to assign fish that were stocked in four Wisconsin lakes to their strain of origin. The strains that were stocked in these lakes were derived from Wisconsin populations in the upper Chippewa River and Wisconsin River drainages and from Leech Lake, Minnesota. The Muskellunge from Leech Lake demonstrated much lower capture rates than the Wisconsin strain, but the results were variable, with a 10% capture rate of fish from the Leech Lake strain in Lake Monona and a 2% capture rate in Lake Wissota, despite similar stocking rates (~25%) in both lakes. We hypothesized that the higher capture rates of Muskellunge from the Wisconsin strain could be due the adaptative advantages of the Wisconsin strain in these waters and suggest that managers continue to stock the nearest native (i.e., Wisconsin) strain to achieve the highest return on investment.

中文翻译：

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利用遗传数据估计四个威斯康星州湖泊中的Muskellunge的威斯康星州和水ch湖菌株的捕获率

许多内陆渔业得到孵化场生产的鱼类的支持，渔业管理者通常在选择品系方面面临困难的决定。设计用来量化应变性能差异的库存评估为设计库存程序提供了有价值的数据。在这里，我们使用遗传工具调查了威斯康星州湖泊中放养的两种Muskellunge菌株的捕获率。我们对13个微卫星上总共1,011的Muskellunge进行了基因分型，并使用来自五个参考种群的数据将在四个威斯康星州湖泊中放养的鱼类分配给了它们的起源菌株。这些湖泊中储存的菌株来自奇珀瓦河上游和威斯康星河排水系统中的威斯康星州种群以及明尼苏达州的里奇湖。尽管有类似的放养，来自水Lee湖的Muskellunge的捕获率比威斯康星州菌株低得多，但结果是可变的，在莫诺纳湖的水ch湖菌株中鱼的捕获率为10％，在威索塔湖中为2％。在两个湖泊中的比率（〜25％）。我们假设威斯康星州菌株对Muskellunge的捕获率较高，可能是由于威斯康星州菌株在这些水域中的适应性优势，并建议管理人员继续储备最接近的本地（即威斯康星州）菌株以实现最高的投资回报率。