Assessment of mortality of Antarctic krill (Euphausia superba) escaping from a trawl
Assessment of mortality of Antarctic krill (Euphausia superba) escaping from a trawl
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DOI：
10.1016/j.fishres.2015.05.019
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发表时间：
2015-10-01
影响因子：
2.4
通讯作者：
Krag, Ludvig A.
中科院分区：
文献类型：
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作者：
Krafft, Bjorn A.;Krag, Ludvig A.
本研究的总体目的是估计逃离当前商业渔业中最常见的网眼尺寸（16 毫米）的南极磷虾（南极磷虾）的死亡率。该实验在南奥克尼群岛（南纬 60 度 35 英尺，西经 45 度 30 英尺）附近进行，采用覆盖密码子采样技术来留住逃逸的磷虾，然后在储水池中对其进行观察，以监测其死亡率。我们的研究结果表明，体长较小的磷虾死亡率较高。然而，采样深度、运输持续时间和渔获积累以及船上的处理效果（例如暴露在温差下）可能会增加我们实验中的死亡率。结果表明，逃脱拖网的磷虾死亡率相对较低，这表明磷虾与许多其他甲壳类动物一样，对捕获和逃逸过程具有相当的耐受性。 (C) 2015 年作者。由 Elsevier B.V 出版。这是一篇基于 CC BY 许可证 (http://creativecommons.org/licenses/by/4.0/) 的开放获取文章。
The overall purpose of this study was to estimate the mortality of Antarctic krill (Euphausia superba) that escape from the most common mesh size used for codends (16 mm) in the current commercial fishery. The experiment was carried out off the South Orkney Islands (60 degrees 35'S, 45 degrees 30'W) using a covered codend sampling technique for retaining escaped krill, which thereafter were observed in holding tanks to monitor their mortality rate. Our results suggest that krill with smaller body lengths suffered higher mortality. However, sampling depth, haul duration and catch accumulation as well as handling effects onboard, such as exposure to temperature differences, likely increased the mortality rates in our experiment. The results indicates that mortality of krill which escape trawl nets is relatively small, suggesting that krill, in common with many other crustacean species, are fairly tolerant to a process of capture-and-escape. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).