Recreational fisheries are often managed to provide satisfying fishing experiences for anglers while conserving wild fish stocks. However, managing recreational fisheries is difficult because fish populations are often infrequently monitored and fishing effort is uncontrolled; moreover, a satisfying fishery may draw many anglers, which may lead to enhanced risk of overfishing. Furthermore, external pressures will also affect fisheries, leading to fishery collapses despite the best intentions of management. Any management decision about regulations and habitat alteration will have effects on angler satisfaction and conservation. Decisions should be made with the intention of achieving fisheries objectives despite the uncertainties that arise from sampling data, ecosystem processes, and external factors, yet they must be defensible to stakeholders and the public. We show herein how decision analysis can be used to evaluate and communicate the relative efficacy of management decisions that are made to achieve fisheries management objectives by using a variety of commonly collected field data. We used a wild kokanee population at risk of overfishing as a case study and evaluated the medium‐term effects of fishing regulations and habitat alterations on conservation and angler utility objectives. Using a flexible age‐structured model, we determined that these two objectives are often at odds, where management actions leading to high angler utility in this fishery also lead to high conservation risk. Overall, decision analysis helps to communicate these tradeoffs and makes it clear how particular decisions were made. Decision analysis is not new, but it is often underused in recreational fisheries. This work demonstrates how it may streamline decisions, even for infrequently monitored fisheries, and lead to better fisheries overall.

中文翻译：

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使用决策分析在休闲渔业中平衡钓鱼者的效用和保护

休闲渔业通常被设法为垂钓者提供令人满意的捕鱼经验，同时保护野生鱼类资源。但是，管理休闲渔业是困难的，因为鱼群的数量经常很少受到监测，捕捞努力不受控制。此外，令人满意的渔业可能吸引许多垂钓者，这可能导致过度捕捞的风险增加。此外，尽管有最佳管理意图，外部压力也会影响渔业，导致渔业崩溃。任何有关法规和栖息地变更的管理决定都会对垂钓者的满意度和保护产生影响。尽管采样数据，生态系统过程和外部因素带来了不确定性，但仍应以实现渔业目标为目的进行决策，但是，它们必须对利益相关者和公众具有防御性。我们在本文中展示了如何使用决策分析来评估和传达通过使用各种通常收集的现场数据来实现渔业管理目标的管理决策的相对效力。我们以有过度捕捞风险的野生科卡尼种群为案例研究，并评估了捕捞法规和栖息地改变对保护和钓鱼者效用目标的中期影响。使用灵活的年龄结构模型，我们确定了这两个目标常常是矛盾的，因为导致该渔业中垂钓者实用性高的管理措施也导致了较高的保护风险。总体而言，决策分析有助于传达这些折衷，并明确说明如何制定特定决策。决策分析不是新事物，但是在休闲渔业中却经常没有使用。这项工作展示了它如何简化决策，甚至对于不经常监视的渔业，也可以使整个渔业更好。