Flume Tank Evaluation on the Effect of Liners on the Physical Performance of the Antarctic Krill Trawl
Flume Tank Evaluation on the Effect of Liners on the Physical Performance of the Antarctic Krill Trawl
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水槽内衬对南极磷虾拖网物理性能影响的评价
DOI：
10.3389/fmars.2021.829615
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发表时间：
2022-01
影响因子：
3.7
通讯作者：
Hu Fuxiang
中科院分区：
文献类型：
--
作者：
Tang Hao;Thierry Nyatchouba Nsangue Bruno;Achille Njomoue P;ong;He Pingguo;Xu Liuxiong;Hu Fuxiang
南极磷虾（Euphausia superba）是海洋中最丰富的资源之一，为南极海洋中的几个重要物种提供食物，几十年来一直是人类的商业目标。为了可持续地管理和捕捞该物种，应为南极磷虾拖网渔业开发节能、渔获量高和有选择的渔具。通过拖网模型水槽试验，研究了拖网面积和衬层长度对拖网工程性能的影响，以预测南极磷虾渔业中的全尺寸中层拖网性能。在南极磷虾渔业传统拖网的基础上，根据修正的Tauti定律设计了4种1/35比例的不同长度的拖网模型，并在水槽中进行了不同拖速、门距、重锤重量和浮力与钓线之比（F/G）的试验。结果表明，与传统拖网相比，衬网长度分别减少25%和50%，网幅面积分别减少11.01%和19.31%，网索张力分别减少12.44%和19.78%，能量效率分别提高17.98%和25.73%。此外，发现衬垫长度减少25%和50%，分别使网口开口增加2.63%和5.38%，扫掠面积增加6.52%和8.38%，两者都与捕获率成正比。虽然50%衬层长度的拖网比衬层长度超过75%的拖网具有更高的能量效率和更大的开口，但没有衬层的大网目部分可能导致磷虾从拖网中逃逸，从而降低总体捕获效率。因此，综合考虑能量效率和捕捞效率，推荐75%的拖缆长度作为捕捞南极磷虾的合适拖网设计。
The Antarctic krill ( Euphausia superba ) is one of the most abundant resources in the ocean, which provides food for several important species in the Antarctic Ocean, and is targeted commercially by humans for many decades. To sustainably manage and harvest the species, energy-efficient, catch-efficient, and selective fishing gears should be developed for the Antarctic krill trawl fishery. This study investigates the effect of twine area and the liner length on the engineering performance of trawl through flume tank testing of trawl model to predict the performance of the full-scale midwater trawl used in the Antarctic krill fishery. Four 1/35th scale trawl model nets with varying lengths of the liner, based on the traditional trawl used in the Antarctic krill fishery, were designed using modified Tauti’s law and were tested in a flume tank at different towing speed, door spread, heavy bob weight, and the ratio of buoyancy to the fishing line (F/G). The results showed that the reduction in liner length by 25 and 50% from the traditional trawl net led to the decrease in twine area by 11.01 and 19.31% and, consequently, resulted in reductions in the lower bridle tension by 12.44 and 19.78%, and increases in energy efficiency by 17.98 and 25.73%, respectively. In addition, the reduction in liner length by 25 and 50% were found to increase the net mouth opening by 2.63 and 5.38% and the swept area by 6.52 and 8.38%, respectively, both of which are proportional to catch rates. Although the trawl net with 50% liner length is more energy-efficient and large mouth opening than those of the trawl net with the liner length over 75% of the trawl body, the large mesh section without a liner can result in the escape of the krill from the trawl, reducing overall catch efficiency. We, therefore, recommend the trawl with 75% of liner length as a suitable design for Antarctic krill considering energy efficiency and catch efficiency.
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影响因子：
2.4
作者：
Mariana A. Juáres;M. Grech;R. Casaux;J. Negrete;Jazmín Fógel;N. Coria;Mercedes M. Santos
通讯作者：
Mariana A. Juáres;M. Grech;R. Casaux;J. Negrete;Jazmín Fógel;N. Coria;Mercedes M. Santos
影响因子：
2.4
作者：
Krafft, Bjorn A.;Krag, Ludvig A.
通讯作者：
Krag, Ludvig A.
DOI：
--
发表时间：
2011
期刊：
--
影响因子：
--
作者：
Feng Chun-lei
通讯作者：
Feng Chun-lei
影响因子：
5
作者：
R. Wan;Mingxiu Jia;Qinglong Guan;Liu-yi Huang;Hui Cheng;F. Zhao;P. He;F. Hu
通讯作者：
R. Wan;Mingxiu Jia;Qinglong Guan;Liu-yi Huang;Hui Cheng;F. Zhao;P. He;F. Hu
DOI：
--
发表时间：
2016-02
期刊：
--
影响因子：
--
作者：
M. Underwood;Shale Rosen;A. Engås;Terje Hemnes;W. Melle;Asbjørn Aasen
通讯作者：
M. Underwood;Shale Rosen;A. Engås;Terje Hemnes;W. Melle;Asbjørn Aasen