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首页> 外文会议>Hugh C. Becker Memorial Muskie Symposium >Muskellunge Population Responses to Angler Catch-and-Release Practices in Escanaba Lake, Wisconsin, 1987-2014
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Muskellunge Population Responses to Angler Catch-and-Release Practices in Escanaba Lake, Wisconsin, 1987-2014

机译：Muskellunge人口对威斯康星州埃斯卡巴湖，威斯康星州斯凯勒捕获和释放实践的回应，1987-2014

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Changes in species-specific angler behaviors from harvest-oriented to voluntary release have the potential to alter fish population and community characteristics. In Escanaba Lake, Vilas County, Wisconsin, targeted and indirect Muskellunge Esox masquinongy angler behavior changed from harvest-oriented to primarily voluntary catch and release (C&R) during the mid-1990s. Since, the Muskellunge population has been lightly exploited (mean exploitation [u] < 0.05), despite no closed season, bag limit, orminimum length limit for Muskellunge, and can now be characterized as a C&R fishery. We tested for differences in Muskellunge adult density, age-0 relative abundance, and size structure indices as a consequence of changes in angler behavior and the subsequent reduction in exploitation. Prior to the shift in angler behavior, the Muskellunge population exhibited characteristics of an exploited fishery (e.g., lower adult size structure, high and more variable natural recruitment). After C&R practices became prevalent, the Muskellunge population exhibited characteristics of an unexploited fishery (e.g., larger adult size structure, low and less variable natural recruitment). Voluntary release of Muskellunge is an angler behavior that is well recognized andpromoted among present-day anglers. We recommend that managers account for these changes in angler behavior and associated population responses and adjust management strategies accordingly. In particular, stocking practices and harvest regulations needto be evaluated to ensure that those strategies are not negatively influencing Muskellunge population dynamics and other associated fish community characteristics.
机译：从收获到自愿释放的物种特定钓鱼者行为的变化有可能改变鱼群和社区特征。在凯西纳湖，维拉斯县，威斯康星州，有针对性和间接的Muskellunge Esox Masquinongy Angler行为从收获导向到20世纪90年代中期的主要自愿捕获和释放（C＆R）改为。由于穆斯克鲁克人口被轻微剥削（均值剥削[U] <0.05），尽管没有封闭的季节，袋子限制，Muskellunge的长度，现在可以被称为C＆R渔业。我们以钓鱼者行为的变化和随后的剥削减少，我们测试了Muskellunge成人密度，年龄-0相对丰度和尺寸结构指数的差异。在钓鱼者行为的转变之前，麝香犬人口展出了剥削的渔业的特征（例如，降低成人尺寸结构，高更可变的自然招募）。在C＆R实践变得普遍之后，Muskellunge人口展出了一个未分发的渔业的特征（例如，更大的成人尺寸结构，低，可变的自然招聘）。麝香的自愿释放是一个垂钓行为，在当今的垂钓者中得到了很好的认可。我们建议经理占垂钓者行为和相关人口响应的这些变化，并相应地调整管理战略。特别是，需要对库存做法和收获法规进行评估，以确保这些策略不会对Muskellunge人口和其他相关的鱼群体特征产生负面影响。

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