Harvest restrictions (e.g. size, sex or species limitations) that are implemented to maintain sustainable fisheries often result in by-catch, e.g. unwanted non-target catch. By-catch is frequently discarded back into the ocean and assumed to survive. However, discarded fishes can succumb to delayed mortality resulting from accumulated stress from fishing activity, and such mortality can impede sustainability efforts. Quantifying reflex and behavioural impairments is a quick and cost-effective method to predict discard-related mortality in some species. We developed and evaluated the effectiveness of a release condition index, based on a reflex-action mortality prediction (RAMP) model, for predicting delayed mortality of black sea bass (Centropristis striata) caught and discarded by the commercial trap fishery in the Mid-Atlantic Bight. Accumulation of impairments, and therefore release condition index, was strongly correlated with delayed mortality of black sea bass discarded and held in sea cages. This is the first release condition index validation study to predict mortality in black sea bass and could be a useful approach for predicting delayed mortality in the commercial fishery.

中文翻译：

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用于预测商业诱捕渔业内黑鲈（Centropristis striata）丢弃物延迟死亡的减损指标。

为维持可持续渔业而实施的捕捞限制（例如大小，性别或物种限制）经常导致副渔获物，例如不必要的非目标渔获物。副渔获物经常被丢弃回到海洋中并假定能够生存。但是，丢弃的鱼类可能会因捕捞活动累积的压力而导致死亡率的下降，而这种死亡率会阻碍可持续性的努力。量化反射和行为障碍是预测某些物种中与丢弃物相关的死亡率的快速且经济高效的方法。我们基于反射性死亡率预测（RAMP）模型开发并评估了释放条件指数的有效性，以预测大西洋中部商业捕捞渔业捕捞和丢弃的黑鲈（Centropristis striata）的延迟死亡率。战斗 损伤的积累以及释放条件指数与丢弃并保存在海笼中的黑鲈的延迟死亡率密切相关。这是第一项用于预测黑鲈鱼死亡率的释放条件指数验证研究，可能是预测商业渔业延迟死亡率的有用方法。