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首页> 外文期刊>Fisheries Research >The consequences of angling, beach seining, and confinement on the physiology, post-release behaviour and survival of adult sockeye salmon during upriver migration
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The consequences of angling, beach seining, and confinement on the physiology, post-release behaviour and survival of adult sockeye salmon during upriver migration

机译：钓鱼，围网围捕和封闭对上游迁移过程中成年红鲑鲑的生理，释放后行为和生存的影响

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Few studies have examined the effects of fisheries capture on wild fish, particularly in the context of evaluating the sustainability of capture and release methods for Pacific salmon (Oncorhynchus spp.) during upriver migration. This study examined the physiological condition, post-release behaviour and survival of adult migrating sockeye salmon (O. nerka) in the Fraser River, British Columbia, Canada. Fish were captured by either beach seine or angling and released immediately, or were captured by angling and released following a 24-h recovery period in a net pen. Before release, all salmon were biopsied or tagged with radio telemetry transmitters. Capture by either angling or beach seine with immediate release resulted in >95% survival 24h after release, whereas net pen recovery after angling resulted in a arrow right 480% survival. This differential in survival was similarly expressed in the percentage of released fish reaching natal sub-watersheds, with 52.2% and 36.3% of fish immediately released by beach seine and angling reaching natal sub-watersheds, respectively, compared with 2.9% of fish released after angling and net pen recovery. Blood plasma stress indices reflected the 10-fold difference in survival, with a a arrow right 44-fold higher plasma cortisol, a a arrow right 42-fold higher plasma glucose and significantly depressed plasma ions and osmolality relative to fish sampled upon capture. Plasma lactate did not differ among groups. Collectively, these results suggest that a 24h recovery in net pen following angling failed to promote post-release survival experienced with immediate release after angling or beach seining.
机译：很少有研究检查渔业捕捞对野生鱼类的影响，特别是在评估上游迁移过程中太平洋鲑鱼（Oncorhynchus spp。）捕捞和释放方法的可持续性的背景下。这项研究检查了加拿大不列颠哥伦比亚省弗雷泽河上成年迁移的红鲑鲑（O. nerka）的生理状况，释放后行为和存活。鱼可以通过围网捕捞或垂钓捕获并立即释放，或在网箱恢复24小时后通过垂钓捕获并释放。在释放之前，对所有鲑鱼进行活检或用无线电遥测发射机进行标记。立即释放通过垂钓或围网围网捕获可导致释放后24小时存活率> 95％，而垂钓后的净笔回收率可达到向右箭头的480％生存率。存活率的差异也类似地表示为到达本生子集水区的已释放鱼的百分比，沙滩围网和垂钓直接到达本生子集水区的鱼分别为52.2％和36.3％，而在此之后释放的鱼为2.9％。钓鱼和净笔恢复。血浆压力指数反映了生存率的10倍差异，其中箭头向右的血浆皮质醇水平高44倍，箭头向右的血浆葡萄糖水平高42倍，血浆离子和渗透压相对于捕获后采样的鱼类显着降低。两组之间的血浆乳酸无差异。总体而言，这些结果表明，垂钓后24小时网笔恢复不能促进垂钓或海滩围网后立即释放所经历的释放后存活。

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