Recreational angling is a major introduction pathway for large-bodied alien fishes into freshwaters, where the fish are released to enhance angling success and increase angler satisfaction, despite this often resulting in invasive populations. There is a thus a need to understand the role of these alien species in angler catches to enable more informed risk-based decisions to be made on future releases. In England, the invasive, piscivorous pikeperch Sander lucioperca has been present in rivers since the 1960s. Anglers target invasive pikeperch in fisheries where the native piscivorous pike Esox lucius is also present; this includes two rivers in the lower Severn basin, western England (main River Severn and Warwickshire Avon). To assess the contributions of invasive pikeperch to angler catches, the aim here was to compare their catches with those of native pike in the lower Severn basin in relation to angling effort and methods, abiotic conditions, and fish size. In 307 angling sessions across 16 anglers where at least one fish was captured, 428 pike and 266 pikeperch were captured. In a sub-set of data from six anglers who submitted catch returns that included non-capture sessions, 78 % of sessions resulted in the capture of at least one pike or pikeperch. Catch rates of pike were significantly higher than pikeperch in the main River Severn but not the Avon. Captured pike were significantly larger than pikeperch, but pikeperch were larger relative to the maximum size each species reaches in England. Lures generally captured more pike than any other method, with these fish tending to be smaller than those caught on other methods; these patterns were not evident in pikeperch. Both species were captured across a broad range of river flow conditions (Q6 to Q99). Only 19 % of successful angling sessions resulted in the capture of both species, suggesting some species selectivity by anglers. These results emphasise that alien fish species can provide important angling resources in recreational fisheries, although management decisions on future introductions should still consider their ecological risks.

娱乐性钓鱼是将大型外来鱼类引入淡水的主要途径，尽管释放出鱼类以提高钓鱼的成功率并提高钓鱼者的满意度，尽管这常常导致入侵种群。因此，有必要了解这些外来物种在垂钓渔获物中的作用，以便就未来的释放做出更明智的基于风险的决策。在英格兰，自1960年代以来，入侵性，食鱼性梭鲈Sander lucioperca便开始出现在河流中。钓鱼者将捕捞鲈鱼的目标定为渔业中的天然食鱼性梭子鱼Esox lucius也存在；这包括英格兰西部的塞文河下游盆地的两条河流（塞文河和沃里克郡雅芳河）。为了评估鲈鱼对垂钓渔获物的贡献，此处的目的是就垂钓工作量和方法，非生物条件和鱼类大小比较它们与塞文河下游盆地的天然鲈鱼的渔获量。在16个钓鱼者的307次钓鱼中，至少捕获了一条鱼，捕获了428梭鱼和266梭子鱼。在来自六个钓鱼者的数据子集中，这些钓鱼者提交了捕获报告，其中包括非捕获会议，其中78％的会议导致捕获了至少一个梭子鱼或梭子鱼。在塞文河主要地区，梭子鱼的捕获率显着高于梭子鱼，但在雅芳河却没有。捕获的梭子鱼明显大于梭子鱼，但相对于英格兰每个物种的最大体型而言，鲈鱼的体型更大。诱饵通常比任何其他方法捕获的梭子鱼都多，这些鱼往往比其他方法捕获的鱼要小。这些模式在梭鲈中并不明显。两种物种均在很宽的河水流量条件下（第6季度至第99季度）被捕获。成功的垂钓环节中只有19％导致了两个物种的捕获，这表明钓鱼者对某些物种具有选择性。这些结果强调，尽管关于未来引进的管理决定仍应考虑其生态风险，但外来鱼类可在休闲渔业中提供重要的垂钓资源。这些鱼往往比其他方法捕获的鱼要小；这些模式在梭鲈中并不明显。两种物种均在广泛的河流流量条件下（第6季度至第99季度）被捕获。成功的垂钓环节中只有19％导致了两个物种的捕获，这表明钓鱼者对某些物种具有选择性。这些结果强调，尽管关于未来引进的管理决定仍应考虑其生态风险，但外来鱼类可在休闲渔业中提供重要的垂钓资源。这些鱼往往比其他方法捕获的鱼要小；这些模式在梭鲈中并不明显。两种物种均在很宽的河水流量条件下（第6季度至第99季度）被捕获。成功的垂钓环节中只有19％导致了两个物种的捕获，这表明钓鱼者对某些物种具有选择性。这些结果强调，尽管有关未来引进的管理决定仍应考虑其生态风险，但外来鱼类可在休闲渔业中提供重要的垂钓资源。