Lake Sturgeon Acipenser fulvescens, once widespread throughout North America, are now considered endangered in much of their natural range. However, recreational catch‐and‐release (C&R) fisheries targeting the Lake Sturgeon have developed in areas with strong populations. Here, we evaluated physiological and behavioral impairment of Lake Sturgeon after C&R angling. Fish were angled from the Winnipeg River and transferred to a holding pen to recover and facilitate serial sampling after angling. Measured physiological traits included blood osmolality, pH, glucose, and cortisol concentration. Behavioral impairment was measured as a binary score using reflex action mortality predictors in addition to ventilation rate. The effects of season and angler experience on these measured variables were assessed. Catch‐and‐release angling resulted in an immediate physiological stress response and behavioral impairment in all Lake Sturgeon regardless of treatment. Generally, we observed a recovery in acid–base balance, ion balance, and reflex impairment by 24 h; however, cortisol and glucose were elevated throughout the recovery period, possibly indicating interactive stressors of holding and repeat sampling. Angling in the summer period caused increased ventilation rate and decreased osmolality at all timepoints compared to angling in the spring. In comparison with experienced anglers, novice anglers caused higher reflex impairment in Lake Sturgeon immediately after capture. This is the first study to examine the response of wild Lake Sturgeon to C&R angling. Data show an apparent resilience of Lake Sturgeon to C&R and can be used to assess the validity of C&R as a management strategy in the conservation of Lake Sturgeon.

中文翻译：

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垂钓者的经历和季节性影响对St鱼对渔获物释放的响应

湖鲟鲟毛鼠曾经在整个北美地区广泛分布，但现在已被视为在其自然范围内处于濒危状态。但是，针对人口众多的St鱼湖的休闲捕捞和捕捞渔业已经发展起来。在这里，我们评估了C＆R钓鱼后St鱼湖的生理和行为损伤。将鱼从温尼伯河弯成一定角度，然后转移到候宰栏中，以恢复并促进成角度后的连续采样。测得的生理特征包括血液渗透压，pH，葡萄糖和皮质醇浓度。除了通气率外，还使用反射动作死亡率预测指标将行为障碍作为二元得分来衡量。评估了季节和钓鱼者经验对这些测量变量的影响。无论采用何种处理方法，捕捞和释放的角度都会在所有的St鱼湖中产生即时的生理应激反应和行为障碍。一般而言，我们观察到24小时内酸碱平衡，离子平衡和反射损伤得以恢复；然而，在整个恢复期间，皮质醇和葡萄糖均升高，这可能表明保持和重复采样的相互作用。与春季垂钓相比，夏季垂钓在所有时间点均导致通风量增加和渗透压降低。与经验丰富的钓鱼者相比，新手钓鱼者在捕获后立即在St鱼湖中引起较高的反射损伤。这是第一个研究野生St鱼对C＆R钓鱼的反应的研究。数据显示St鱼湖对C＆