The Atlantic sea scallop Placopecten magellanicus dredge fishery is one of the most lucrative commercial fishing industries in the northeastern United States, and fish bycatch can comprise up to ~42% of the total catch. Benthic species, such as flatfish, are particularly susceptible to unintended capture in scallop dredge gear, and mitigating bycatch and associated mortality has been mandated a priority for fisheries management. Based on this management need, the present study evaluated the physical, physiological, and behavioral stress responses of Yellowtail Flounder Limanda ferruginea, Windowpane Scophthalmus aquosus, and Fourspot Flounder Paralichthys oblongus to capture in the scallop dredge fishery. More specifically, we used generalized additive models and linear regression models to assess the influence of various fishing practices, environmental conditions, and biological factors on injury condition, physiological parameters, and reflex indicators. Although these flatfish species appeared to be physically resilient to capture based on an observable injury assessment, dredge capture and handling factors proved stressful, with the degree of immediate mortality, physiological disturbances, and reflex impairment varying by species. While multiple factors influenced the degree of stress in these species, based on our results the reduction of tow duration and limiting air exposure/sorting duration would likely be the most effective strategies to mitigate the impact of scallop dredge fishing on these flatfish species.

中文翻译：

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扇贝疏edge捕捞作业对丢弃的黄尾比目鱼，窗玻璃和四斑比目鱼的身体，行为和生理压力的影响

大西洋扇贝Placopecten magellanicus疏edge渔业是美国东北部最有利可图的商业捕鱼业之一，鱼副渔获物可占总渔获量的约42％。底栖鱼类，例如比目鱼，特别容易受到扇贝挖泥机意外捕捞的影响，减轻副渔获物和相关的死亡率已被强制作为渔业管理的重点。基于这种管理需要，本研究评估了黄尾比目鱼Limanda ferruginea，窗玻璃硬co鱼和长斑比目鱼的生理，生理和行为应激反应。在扇贝疏edge渔业中捕获。更具体地说，我们使用广义加性模型和线性回归模型来评估各种捕鱼行为，环境条件和生物学因素对伤害条件，生理参数和反射指标的影响。尽管根据可观察到的伤害评估，这些比目鱼物种在捕获方面似乎具有一定的弹性，但事实证明，挖泥机的捕获和处理因素具有压力，即时死亡率，生理障碍和反射损伤的程度因物种而异。尽管多种因素影响了这些物种的压力程度，