Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Catch characteristics of the gill nets for flounder by the physical property of net filament in the East Sea

그물실의 물성에 따른 동해안 가자미 자망어업의 어획 특성

  • Bae, Bong-Seong (Fisheries System Engineering Division, National Fisheries Research & Development Institute) ;
  • Lim, Ji-Hyun (Fisheries System Engineering Division, National Fisheries Research & Development Institute) ;
  • Park, Seong-Wook (Fisheries System Engineering Division, National Fisheries Research & Development Institute) ;
  • Kim, Seong-Hun (Fisheries System Engineering Division, National Fisheries Research & Development Institute) ;
  • Cho, Sam-Kwang (Fisheries System Engineering Division, National Fisheries Research & Development Institute)
  • 배봉성 (국립수산과학원 시스템공학과) ;
  • 임지현 (국립수산과학원 시스템공학과) ;
  • 박성욱 (국립수산과학원 시스템공학과) ;
  • 김성훈 (국립수산과학원 시스템공학과) ;
  • 조삼광 (국립수산과학원 시스템공학과)
  • Received : 2013.04.29
  • Accepted : 2013.05.06
  • Published : 2013.05.31
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Abstract

Physical characteristics of net filament were investigated to test the fishing capacity of gill nets due to the flexibility difference between nylon and biodegradable nets (PBS 95%+PBAT 5% and PBS 80%+PBAT 20%). In addition, a total of 16 fishing experiments were conducted in the coastal waters of Jeongja, Ulsan, from August 10 to October 20, 2011 and from September 11 to November 3, 2012. The test results showed that nylon net filament exhibited more flexibility than biodegradable net filament when they were wet. Accordingly, the longer submerged time, the more fishing capacity the nylon gill nets demonstrated in comparison with the biodegradable gill nets. A total of 16 species were caught in 2011 with the nylon gill nets (1,323 fishes, weighing 342,885g) and the biodegradable gill nets (958 fishes, weighing 236,857g). 15 species were caught in 2012 with the nylon gill nets (1,582 fishes, weighing 448,360g) and the biodegradable gill nets (1,431 fishes, weighing 406,590g). Thus catch weights and the number of fish caught produced by the nylon nets were 1.45 times and 1.38 times higher than those of the biodegradable nets produced in 2011, and 1.1 times and 1.11 times higher in 2012. A test on the target species, pointhead flounder (Cleisthenes pinetorum) has similar results. The flexibility of a net was proved to be related to the fishing capacity, and as a result, it is concluded that the higher flexibility, the higher fishing capacity.

Keywords

References

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