• Title/Summary/Keyword: 어장환경

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위성자료를 이용한 고등어 어장의 월별분포

  • Kim, Sang-U;O, Jun-Seok;Go, U-Jin;Jang, Lee-Hyeon;Seo, Yeong-Sang;Geleekko, Yamada;Im, Jin-Uk
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2007.05a
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    • pp.285-288
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    • 2007
  • 본 연구에서는 위성자료와 현장조사를 이용하여 통계적인 방법에 의해 고등어 어장의 월별 예상어장도를 작성하였다. 고등어에 대한 등급별 회귀직선방정식을 이용하여 계산된 각해구별 어획량과 현장조사 어획량과의 상관관계를 분석한 결과, A와 B등급 해역에서 추정된 어획량은 현장 조사된 어획량과 정량적인 차이는 있지만 상관관계가 상당히 높게 나타나는 것을 알 수 있었다.

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Implementation of Unmanned Aquaculture Security System (무인 어장 도적 감시 시스템 구현에 관한 연구)

  • Yim, Jeong-Bin;Nam, Taek-Keun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.13 no.1 s.28
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    • pp.61-67
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    • 2007
  • This paper describes the implementation procedures and results of Fishery Safety and Security System to secure an aquaculture area from a thief. The system designed with various functional modules to implement selectively available system providing low cost to high cost and simple function to high function according to user's requirement in a practical fishing fields. In the abalone farm field located in Jin island, Jeonranam province and having condensed aquaculture facilities with 50 cages (10 row by 5 column) within 0.5 miles from coast, practical field tests are carried out. As results from that tests, it is found that the system can guard not only the whole area of cultivating farm field but also each cages with detail.

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Modeling Variation in Residence Time Response to Freshwater Discharge in Gangjin Bay, Korea (남해 강진만 담수유입에 따른 체류시간 변화 모델링)

  • Kim, Jin Ho;Park, Sung-Eun;Lee, Won-Chan
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.4
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    • pp.480-488
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    • 2021
  • The term residence time is defined as the time taken for substances in a system to leave the system and is a useful concept to explain the physical environment characteristics of a coastal area. It is important to know the spatial characteristics of the residence time to understand the behavioral properties of pollutants generated in a marine system. In this study, the spatial distribution of average residence time was calculated for Gangjin Bay, Korea, using a hydrodynamic model including a particle tracking module. The results showed that the average residence time was about 10 days at the surface layer and about 20 days at the bottom layer. Spatially, this was the longest residence time in the southwestern sea. There was no significant difference in average residence time at the surface layer due to freshwater discharge, but spatial variation at the bottom layer was larger. The average residence time at the bottom layer decreased in the southwestern area due to freshwater discharge and increased in the northern area. This result suggests that the residence time of anthropogenic pollutants may have a large spatial difference depending on the freshwater discharge, and thus the time taken to influence cultured organisms may also vary.