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Physiological effects of catch-and-release angling on freshwater drum (Aplodinotus grunniens)
Fisheries Research ( IF 2.4 ) Pub Date : 2021-01-24 , DOI: 10.1016/j.fishres.2021.105881
Jamie T. Card , Caleb T. Hasler

Many catch-and-release angling events involve air exposure and exhaustive exercise that elicit a physiological stress response, and depending on a variety of factors, delayed mortality is a possible outcome. There have been ample studies in this area, however, significant gaps exist in the literature for species that are targeted by more specialized anglers, such as freshwater drum (Aplodinotus grunniens). We quantified physiological and reflex responses in freshwater drum following angling, across seasons. Once a fish was on the line, the fight duration and time exposed to air were varied to account for differences in angler skill level (fight time range: 5 s to 2 min; air exposure range: 20 s to 3 min). Location and severity of injury were determined, blood biopsies were taken to quantify physiological stress, and reflex impairment was assessed. Thirty-one percent of fish captured were deeply hooked in the esophagus tissue. Freshwater drum experienced a disruption in homeostasis as blood glucose, plasma cortisol, and plasma lactate increased significantly from baseline values following angling. Additionally, seasonal differences were observed for blood glucose and plasma cortisol as higher values were observed in the summer when compared to the spring. The ‘orientation’ reflex was the most frequently impaired (29 % of fish lacked this reflex), but impairment did not differ seasonally. Because freshwater drum have the largest latitudinal range of any North American freshwater fish and are being targeted more frequently by anglers as of late, it is important to fill this knowledge gap regarding their responses to angling events to develop best practices for anglers to promote conservation. The wide distribution of freshwater drum may also make them a candidate model species for addressing the convergence between assessing the impacts of catch-and-release angling and other environmental issues facing freshwater fishes, such as climate change.



中文翻译:

捕捞和放对淡水鼓(Aplodinotus grunniens)的生理影响

许多捕捉和释放的钓鱼活动涉及暴露于空气和进行生理应激反应的力竭运动,根据各种因素,延迟死亡是可能的结果。在这一领域已经进行了充分的研究,但是,在文献中对于更专业的钓鱼者所针对的物种(例如淡水鼓(Aplodinotus grunniens))。我们量化了整个季节钓鱼后淡水鼓中的生理和反射反应。一旦鱼上线,就改变了战斗时间和暴露于空气的时间,以说明钓鱼者的技术水平差异(战斗时间范围:5 s至2分钟;空气暴露范围:20 s至3分钟)。确定损伤的位置和严重程度,进行活检以量化生理压力,并评估反射损伤。捕获的鱼中有31%深深地钩在食道组织中。钓鱼后,由于血糖,血浆皮质醇和血浆乳酸水平从基线值显着增加,淡水鼓经历了体内稳态的破坏。另外,与夏季相比,夏季和夏季观察到较高的血糖值和血糖和血浆皮质醇的季节性差异。“定向”反射最常受到损害(29%的鱼类缺乏这种反射),但损害程度在季节性上没有差异。由于淡水鼓在北美淡水鱼中的纬度范围最大,并且直到最近才被钓鱼者更频繁地作为目标,因此,填补有关它们对钓鱼事件的反应的知识空白对于开发钓鱼者的最佳做法以促进保护非常重要。淡水鼓的广泛分布也可能使它们成为候选模型物种,以解决评估捕捞和释放渔获的影响与淡水鱼面临的其他环境问题(例如气候变化)之间的融合问题。“定向”反射最常受到损害(29%的鱼类缺乏这种反射),但损害程度在季节性上没有差异。由于淡水鼓在北美淡水鱼中的纬度范围最大,并且直到最近才被钓鱼者更频繁地作为目标,因此,填补有关它们对钓鱼事件的反应的知识空白对于开发钓鱼者的最佳做法以促进保护非常重要。淡水鼓的广泛分布也可能使它们成为候选模型物种,以解决评估捕捞和释放渔获的影响与淡水鱼面临的其他环境问题(例如气候变化)之间的融合问题。“定向”反射最常受到损害(29%的鱼类缺乏这种反射),但损害程度在季节性上没有差异。由于淡水鼓在北美淡水鱼中的纬度范围最大,并且直到最近才被钓鱼者更频繁地作为目标,因此,填补有关它们对钓鱼事件的反应的知识空白对于开发钓鱼者的最佳做法以促进保护非常重要。淡水鼓的广泛分布也可能使它们成为候选模型物种,以解决评估捕捞和释放渔获的影响与淡水鱼面临的其他环境问题(例如气候变化)之间的融合问题。由于淡水鼓在北美淡水鱼中的纬度范围最大,并且直到最近才被钓鱼者更频繁地作为目标,因此,填补有关它们对钓鱼事件的反应的知识空白对于开发钓鱼者的最佳做法以促进保护非常重要。淡水鼓的广泛分布也可能使它们成为候选模型物种,以解决评估捕捞和释放渔获的影响与淡水鱼面临的其他环境问题(例如气候变化)之间的融合问题。由于淡水鼓在北美淡水鱼中的纬度范围最大,并且直到最近才被钓鱼者更频繁地作为目标,因此,填补有关它们对钓鱼事件的反应的知识空白对于开发钓鱼者的最佳做法以促进保护非常重要。淡水鼓的广泛分布也可能使它们成为候选模型物种,以解决评估捕捞和释放渔获的影响与淡水鱼面临的其他环境问题(例如气候变化)之间的融合问题。

更新日期:2021-01-25
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