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Catch characteristics of the biodegradable gill net for flounder

생분해성 가자미 자망어업의 어획 특성

  • Bae, Bong-Seong (Fisheries System Engineering Division, National Fisheries Research & Development Institute) ;
  • Cho, Sam-Kwang (External Research Cooperation 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)
  • 배봉성 (국립수산과학원 시스템공학과) ;
  • 조삼광 (국립수산과학원 대외협력과) ;
  • 박성욱 (국립수산과학원 시스템공학과) ;
  • 김성훈 (국립수산과학원 시스템공학과)
  • Received : 2012.09.18
  • Accepted : 2012.11.15
  • Published : 2012.11.30

Abstract

There are many studies of the biodegradable net for fishing to prevent marine pollution in Korea and the snow crab gill nets is developed effectively. Recently, the biodegradable gill net for fishes is being developed. This study is the experiment of the catch characteristics for the biodegradable flounder gill net. The 8 experiments were carried out using the nylon gill net and the biodegradable gill net in from August to October, 2011 in the southern East Sea. The results obtained from the above approaches are summarized as follows; A total of 16 species was caught with most dominant species of Cleisthenes pinetorum followed by Liparis tanakai, Glyptocephalus stelleri, Buccinum striatissimum and Dasycottus setiger. A total of catch of the nylon net was 342,885g and that of the biodegradable net was 236,857g. Thus catch of the nylon net was 1.45 times more than that of the biodegradable net. The length composition of Cleisthenes pinetorum, caught by the biodegradable net was very similar to that of nylon. As a result of analysis on the effect of submerged time, small fish escaped more easily than large fish as the submerged time is getting longer. And catches of the biodegradable net was less than the nylon net's as higher as wave height. Wave height was more influential factor for fishing capacity than submerged time based on the results of a comparison between catch difference of two kinds of gill nets and catch characteristics.

Keywords

Biodegradable gill net;Nylon gill nets;Fishing capacity;Submerged time

Acknowledgement

Grant : 친환경 수산자재 및 어구어법 개발

Supported by : 국립수산과학원

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