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Fishing performance of a coastal drift net in accordance with materials of the environmentally-friendly biodegradable net twine

친환경 생분해성 그물실의 재질에 따른 연안 유자망의 어획성능 특성

  • KIM, Seonghun (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • KIM, Pyungkwan (Fisheries Engineering Research Division, National Institute of Fisheries Science) ;
  • JEONG, Seongjae (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • BAE, Jaehyun (Fisheries Engineering Research Division, National Institute of Fisheries Science) ;
  • LIM, Jihyun (Fisheries Engineering Research Division, National Institute of Fisheries Science) ;
  • OH, Wooseok (Division of Fisheries Science, Chonnam National University)
  • 김성훈 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 김병관 (국립수산과학원 수산공학과) ;
  • 정성재 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 배재현 (국립수산과학원 수산공학과) ;
  • 임지현 (국립수산과학원 수산공학과) ;
  • 오우석 (전남대학교 수산과학과)
  • Received : 2018.02.07
  • Accepted : 2018.05.04
  • Published : 2018.05.31

Abstract

The objective of this study was to estimate physical properties and fishing performances of net twine with improved PBS copolymer resin (Bio-new), the existing PBS/PBAT blending resin (Bio-old) and commercial Nylon (Nylon). The tensile strength of Bio-new monofilament was equal to Bio-old and the elongation of Bio-new was about 6 % higher than that of Bio-old in wet condition. The physical properties tests were carried out to estimate breaking load and stiffness in dry and wet conditions, respectively. In the results, the breaking load of Nylon netting was the highest whereas the elongation of Bio-new was 1.4 times higher than that of Nylon netting in wet condition. The breaking load of Bio-old netting was about 9.2 % higher than that of Bio-new netting. However, the elongation of the Bio-new netting was about 3% higher than that of Bio-old. The stiffness of the Bio-new compared to Bio-old was improved about 34 % in dry condition and about 32 % in wet condition. The filed experiments of the fishing performance were conducted with three kinds of drift nets with different netting materials in the coastal sea of Jeju. The each experimental drift net made of different materials showed the similar fishing performance. Bio-old drift net yielded less catches of small sized yellow croaker than other drift nets. The netting materials affected the fishing performance and length distribution of catches in the drift nets.

Keywords

Biodegradable net;Environmentally-friendly;Drift net;Fishing performance;Netting material

Acknowledgement

Supported by : 국립수산과학원

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