The proportion of angled Atlantic salmon Salmo salar L. being caught and released has increased. If individuals are repeatedly captured, this may have fish welfare consequences. Of 995 Atlantic salmon tagged during catch and release in eight Norwegian rivers, 10% were captured twice, while 3% were captured three times within the same fishing season. The probability that released salmon were captured again decreased with decreasing time left of the fishing season, decreased for larger‐sized fish and varied among rivers/years. Increased exploitation rates within the river, indicating an increased fishing pressure, strongly increased the probability that fish would be recaptured. However, the proportion of salmon caught a second time was much lower than the total exploitation rates in the same rivers (which was on average 46%). For fish tagged in the sea, the likelihood of being angled decreased with time since entering the river, which may explain why the recapture rates of caught and released fish were lower than the total exploitation rates.

中文翻译：

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在一次捕捞和放流渔业中，个体鱼被多次捕获的风险

被捕获和释放的有角度的大西洋鲑鱼 Salmo salar L. 的比例有所增加。如果个人被反复捕获，这可能会对鱼类福利产生影响。在挪威 8 条河流中捕获和释放的 995 条大西洋鲑鱼中，10% 被捕获两次，而 3% 在同一捕捞季节被捕获三次。随着捕鱼季节剩余时间的减少，再次捕获释放的鲑鱼的概率降低，大型鱼类的概率降低，河流/年份不同。河流内的开发率增加，表明捕捞压力增加，大大增加了重新捕获鱼类的可能性。然而，第二次捕获鲑鱼的比例远低于同一条河流的总开发率（平均为 46%）。