In live‐release angling tournaments, fish are captured and typically held within onboard live‐well systems, where they are subsequently “culled” (i.e., released) as larger fish are captured. Anglers often mark individual fish to easily identify them based on weight and to reduce handling time. However, there is limited information about the physiological consequences of using different culling apparatus on fish. This study examined the physiological consequences associated with using four different types of culling apparatus (i.e., metal stringer through the jaw, pincher on the jaw, lasso around the caudal peduncle, and zippered mesh bag) on Largemouth Bass Micropterus salmoides relative to controls during a 2‐h live‐well retention period. Blood samples were taken afterwards and were analyzed for blood glucose, blood lactate, plasma cortisol, and osmolality. Compared to the baseline control (i.e., fish that were captured, subjected to blood sampling, and immediately released), blood parameters (except osmolality) were significantly elevated in all treatments. The pincher and lasso treatments tended to yield higher physiological disturbances than the other treatments, including fish that were held in the live well without any culling apparatus. Moreover, the lasso culling apparatus appeared to cause noticeable injury relative to the other culling devices. Our research provides valuable information to help guide the selection of culling gear that maintains the welfare status of retained fish during tournaments.

中文翻译：

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大嘴鲈鱼不同钓鱼比赛剔除方法的生理后果

在实时发布的钓鱼比赛中，捕获鱼并将其保存在船上的实时系统中，然后在捕获更大的鱼时对其进行“剔除”（即释放）。钓鱼者通常会标记单个鱼，以便根据体重轻松识别它们并减少处理时间。但是，关于在鱼类上使用不同的剔除设备的生理后果的信息有限。本研究使用剔除装置的四种不同类型的相关联的生理后果（即，通过卡爪金属纵梁，折印的下巴，套索周围尾柄，和拉链网眼袋）上口黑鲈加州鲈相对于对照组在2小时的活井保留期内。随后采集血样，并分析血糖，血乳酸，血浆皮质醇和渗透压。与基线对照（即，被捕获，接受血液采样并立即释放的鱼）相比，所有处理中的血液参数（重量摩尔渗透压浓度除外）均显着提高。与其他处理方法（包括在没有任何剔除设备的情况下被饲养在活井中的鱼）相比，捏和套索处理方法往往会产生更高的生理干扰。此外，套索剔除设备相对于其他剔除装置似乎引起明显的伤害。我们的研究提供了宝贵的信息，可帮助指导选择在比赛中保持retained鱼福利状态的剔除工具。