Warming water temperatures, combined with increased mortality following catch and release, could have synergistic consequences if rivers remain open to catch and release at high water temperatures, and catchability of fish remains similar across water temperatures. Here archived data for Atlantic salmon, Salmo salar L., were used to (a) quantify the influence of water temperature on catchability and (b) refine estimates of absolute catch and release mortality to incorporate the relationship between temperature and catchability. A significant decline in the number of Atlantic salmon caught at warmer water temperatures was found after accounting for the effects of river water height, fishing effort, run duration and year‐to‐year differences in fish abundance. Overall, absolute catch and release mortalities were predicted to be infrequent at cool river temperatures. At river temperatures sometimes associated with fishing closures, mortality due to the catch and release ranged from 6% to 14%. Although post‐release mortality increases with water temperature, it is somewhat compensated by the reduced catchability of Atlantic salmon. Thus, the catchability component of catch and release is an integral consideration when evaluating the effectiveness of river closure temperature thresholds when managing catch and release angling.

中文翻译：

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大西洋鲑在高水温下的可捕性：河流截流温度阈值对垂钓和垂钓的影响

如果河流在高水温下仍然开放以捕获和释放，并且水的温度在不同温度下仍可捕获，则水温升高以及捕获和释放后死亡率增加可能会产生协同效应。此处为大西洋鲑鱼，萨尔莫鲑鱼的存档数据L.被用来（a）量化水温对可捕性的影响，（b）完善绝对捕捞和释放死亡率的估计，以纳入温度和可捕性之间的关系。在考虑了河水高度，捕捞努力，持续时间和鱼类丰度年比差异的影响后，发现在水温较高时捕获的大西洋鲑鱼数量显着下降。总体而言，在凉爽的河流温度下，绝对捕获和释放的死亡率很少见。在有时与捕鱼禁渔有关的河流温度下，由于捕获和释放造成的死亡率在6％至14％之间。尽管释放后的死亡率随着水温的升高而增加，但大西洋鲑的捕捞能力下降在一定程度上弥补了这一损失。因此，