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首页> 外文期刊>ICES Journal of Marine Science >Survival rates for Nephrops norvegicus discarded from Northern European trawl fisheries
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Survival rates for Nephrops norvegicus discarded from Northern European trawl fisheries

机译：从北欧拖网渔业中丢弃尼科夫诺威治的生存率

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摘要

When discarded from bottom trawl fisheries, survival of Nephrops norvegicus may be sufficiently high that this species can be exempted from the EU Landing Obligation. In three studies, Nephrops were sampled from trawlers in northern European waters, and the fate of individuals monitored for a minimum of 13 days in onshore tanks. Winter estimates of captive survival (means +/- 95% confidence intervals), including immediate mortality during catch sorting, were 62 +/- 2.8% for the West of Scotland, 57 +/- 1.8% for the Farne Deeps (North Sea), and 67 +/- 5.4% for the Skagerrak. The Farne Deeps fishery is not active in summer, but captive survival rates in summer in the other two areas were reduced to 47 +/- 3.4% for West of Scotland and 40 +/- 4.8% for the Skagerrak. Linear modelling of the West of Scotland and Skagerrak data suggested that higher survivals in winter were related to colder water or air temperatures, although temperatures during captive observation may also have had an impact. Net modifications in the Skagerrak study had an effect on survival, which was higher for Nephrops sampled from nets equipped with the more selective Swedish sorting grid compared to Seltra trawls.
机译：当从底部拖网渔业中丢弃时，Nephrops Norvegicus的存活可能足够高，这种物种可以免于欧盟登陆义务。在三项研究中，尼科斯在北欧水域的拖网渔船中取样，并且在陆上坦克中监测的人的命运至少13天。冬季捕获生存（意味着+/- 95％的置信区间）的冬季估计，包括在捕获期间的直接死亡率，为苏格兰西部的62 +/- 2.8％，57 +/- 1.8％，为Farne Deeps（北海） Skagerrak的67 +/- 5.4％。 Farne Deeps Fishery在夏天没有活跃，但夏季的俘虏生存率在苏格兰西部的47 +/- 3.4％减少到Skagerrak的40 +/- 4.8％。苏格兰和Skagerrak数据西部的线性建模表明，冬季的幸存者较高的水或空气温度有关，尽管俘虏观察期间的温度也可能产生影响。 SKAGERRAK研究中的净修改对生存有影响，对于从配备更多选择性瑞典分类网格的网，与SELTRA拖网相比，尼科夫的肾脏较高。

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