Effects of capture depth on walleye hooking mortality during ice fishing

IF 1.1 4区环境科学与生态学 Q4 LIMNOLOGY

Lake and Reservoir Management Pub Date : 2022-10-02 DOI:10.1080/10402381.2022.2130118

Cade A. Lyon, Jacob L. Davis, M. Fincel, S. Chipps

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引用次数: 0

Abstract

Abstract Lyon CA, Davis JL, Fincel MJ, Chipps SR. 2022. Effects of capture depth on walleye hooking mortality during ice fishing. Lake Reserv Manage. 38:334–340. Length-based regulations are a common tool used to limit fishing mortality by controlling the size of fish harvested. While such regulations are helpful in managing fish populations, mortality associated with catch-and-release fishing may negatively impact a fishery. We evaluated factors affecting hooking mortality of walleye (Sander vitreus) in 2 mainstem Missouri River reservoirs in South Dakota. Winter walleye hooking mortality was evaluated during the ice fishing season in February and March 2020. After capture, walleye (n = 55) were placed into holding pens for 12 to 72 h to monitor postrelease mortality. Hooking mortality was found to be 20% following angling. Capture depth, landing time, and time in pen were the most influential variables on probability of hooking mortality (pm ). We observed a sharp increase in pm for walleye captured at depths from 10 to 12 m, where the probability of mortality for fish increased appreciably from 5 to 37%, respectively. Our findings indicate that hooking mortality during the ice fishing season can be substantial in lakes where walleye angling occurs at depths greater than 10 m.

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捕深对冰钓时白眼鱼钩钩死亡率的影响

Lyon CA, Davis JL, Fincel MJ, Chipps SR. 2022。捕深对冰钓时白眼鱼钩钩死亡率的影响。湖泊保护区管理。38:334-340。以长度为基础的规定是一种常用的工具，通过控制收获的鱼的大小来限制捕捞死亡率。虽然这些规定有助于管理鱼类种群，但与捕捞和释放捕捞有关的死亡率可能对渔业产生负面影响。本研究评估了南达科他州密苏里河2个主要水库中白眼鱼(Sander玻璃体)钩死的影响因素。在2020年2月和3月的冰钓季节，评估了冬季白眼鱼的捕捞死亡率。捕获后，将55只黄眼鱼放入笼中12 ~ 72 h，监测放生后死亡率。钓鱼后的死亡率为20%。捕获深度、着陆时间和围栏时间是影响钩死概率(pm)的主要变量。我们观察到在10至12米深度捕获的白眼鱼的pm急剧增加，鱼类的死亡率分别从5%明显增加到37%。我们的研究结果表明，在深度大于10米的湖泊中，冰钓季节的鱼钩死亡率可能很高。

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来源期刊

Lake and Reservoir Management 环境科学-海洋与淡水生物学

自引率

6.70%

发文量

期刊介绍： Lake and Reservoir Management (LRM) publishes original, previously unpublished studies relevant to lake and reservoir management. Papers address the management of lakes and reservoirs, their watersheds and tributaries, along with the limnology and ecology needed for sound management of these systems. Case studies that advance the science of lake management or confirm important management concepts are appropriate as long as there is clearly described management significance. Papers on economic, social, regulatory and policy aspects of lake management are also welcome with appropriate supporting data and management implications. Literature syntheses and papers developing a conceptual foundation of lake and watershed ecology will be considered for publication, but there needs to be clear emphasis on management implications. Modeling papers will be considered where the model is properly verified but it is also highly preferable that management based on the model has been taken and results have been documented. Application of known models to yet another system without a clear advance in resultant management are unlikely to be accepted. Shorter notes that convey important early results of long-term studies or provide data relating to causative agents or management approaches that warrant further study are acceptable even if the story is not yet complete. All submissions are subject to peer review to assure relevance and reliability for management application.