In central Europe, both brown trout Salmo trutta and European grayling Thymallus thymallus are threatened native salmonid species with high value in recreational angling and nature conservation. On the other hand, rainbow trout Oncorhynchus mykiss and brook trout Salvelinus fontinalis are intensively stocked non‐native species of high angling value but no value for nature conservation. This study tested if harvest rates of native salmonids are negatively correlated to intensive stocking and harvest rates of non‐native salmonids in inland freshwater recreational fisheries. Data were collected from 250 fishing sites (river and stream stretches) over 13 years using mandatory angling logbooks. Logbooks were collected from individual anglers by the Czech Fishing Union in the regions of Prague and Central Bohemia, Czechia (central Europe) and processed by the author of this study. In result, anglers harvested 200,000 salmonids with total weight of 80 tons over 13 years. Intensive stocking of multiple salmonid species lead to slightly lower harvests of native salmonids. Inversely, intensive harvests of multiple salmonid species lead to slightly higher harvest of native salmonids. Recapture rates of stocked salmonids were relatively low (0.6%–3.7%), proving fish stocking moderately ineffective. Since the effects of non‐native salmonid stocking and harvest rates on native salmonid harvest were significant but not strong, it is suggested that rivers and streams that support fishing for non‐native salmonids still support fishing for native salmonids. However, this idea does not apply for fishing sites with really high intensity of non‐native salmonid stocking – harvest rates of natives were very low on these fishing sites.

中文翻译：

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渔业管理对本地和非本地鲑鱼物种捕捞率的影响

在中欧，褐鳟 Salmo trutta 和欧洲鳟鱼 Thymallus thymallus 都是受到威胁的本地鲑鱼物种，在休闲垂钓和自然保护方面具有很高的价值。另一方面，虹鳟 Oncorhynchus mykiss 和溪鳟 Salvelinus fontinalis 是大量放养的非本地物种，具有高垂钓价值，但没有自然保护价值。该研究测试了本地鲑鱼的捕捞率是否与内陆淡水休闲渔业中非本地鲑鱼的集约化放养和捕捞率呈负相关。使用强制性钓鱼日志从 250 个捕鱼地点（河流和溪流）收集了 13 年的数据。日志是由捷克渔业联盟在布拉格和中波希米亚地区从个人垂钓者那里收集的，捷克（中欧）并由本研究的作者处理。结果，垂钓者在 13 年的时间里收获了 200,000 条鲑鱼，总重达 80 吨。多种鲑鱼物种的密集放养导致本地鲑鱼的产量略有下降。相反，多种鲑鱼物种的集约化收获会导致本地鲑鱼的收获略高。放养鲑鱼的回收率相对较低（0.6%–3.7%），证明放养鱼类的效果中等。由于非本地鲑鱼放养和捕捞率对本地鲑鱼捕捞的影响显着但不强，因此建议支持捕捞非本地鲑鱼的河流和溪流仍然支持捕捞本地鲑鱼。然而，