Volume 18 Issue 5
Oct.  2022
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HAO Yuxin, WAN Rong, ZHOU Cheng, YE Xuchang, GUAN Qinglong, ZHANG Xiaoxian. Hydrodynamic performance of Argentine shortfin squid (Illex argentinus) bottom trawl[J]. South China Fisheries Science, 2022, 18(5): 118-127. DOI: 10.12131/20210343
Citation: HAO Yuxin, WAN Rong, ZHOU Cheng, YE Xuchang, GUAN Qinglong, ZHANG Xiaoxian. Hydrodynamic performance of Argentine shortfin squid (Illex argentinus) bottom trawl[J]. South China Fisheries Science, 2022, 18(5): 118-127. DOI: 10.12131/20210343
shu

Hydrodynamic performance of Argentine shortfin squid (Illex argentinus) bottom trawl

  • 1.

    College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China

  • 2.

    National Engineering Research Center for Oceanic Fisheries/Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China

  • 3.

    Ocean University of China, Qingdao 266100, China

  • 4.

    Shandong Haoyuntong Nets Technology Co., Ltd., Rongcheng 264300, China

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  • Received Date: November 16, 2021
  • Revised Date: January 08, 2022
  • Accepted Date: February 13, 2022
  • Available Online: February 27, 2022
    Graphical Abstract
    • Abstract
  • Illex argentinus, inhabiting in shallow waters with a short life cycle, is an important economic cephalopod in the high seas fishing ground of the southwest Atlantic Ocean. Squid jigging and bottom trawling are the main fishing patterns to catch this species. However, there are some problems in bottom trawl, such as high energy consumption, and poor matching between vessel and trawl. Thus, it is necessary to understand the hydrodynamic performance of bottom trawl for I. argentinus. In this paper, we conducted a model experiment in the dynamic water tank to explore the effects of towing speed, horizontal spreading ratio, buoyancy weight ratio on the hydrodynamic performance of height of net opening, resistance, coefficient of energy consumption and power consumption. The model net was designed based on the small mesh six-panel single boat bottom trawl used for the main capture of I. argentinus [Main scale: 200 m×113.8 m (84.6 m)]. According to the Tauti's Law, the model experiment was scaled with the large scale ratio of 1∶30 and the small scale ratio of 1∶5. When the towing speed V was 3 kn and the horizontal spreading ratio L/S was 0.54, the buoyancy weight ratio increased from 0.6 to 0.7, the height of the net opening increased from 9.66 m to 14.1 m, and the resistance increased from 73.73 kN to 83.48 kN. However, with the increase of towing speed, the influence of the buoyancy weight ratio on the height of the net opening and resistance decreased. When the sweeping area of trawl opening was less than 200 m2, the energy consumption coefficient was greatly affected by the horizontal expansion ratio, on the contrary, it was greatly affected by the height of trawl opening. The power consumption increased with towing speed and horizontal spreading ratio. It accounted for more than 10% of main engine power for vessel when the towing speed was more than 4 kn.
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