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Effect of Temperature on Anchovy Catch and Laver Production in the Eastern Part of the South Sea of Korea

멸치와 김 생산량 변동에 미치는 수온의 영향

  • Lee, Chung-Il (Research Center for Ocean Industrial and Development, Pukyong National University) ;
  • Kim, Hyun-Ju (Interdisciplinary Program of Ocean Industrial Engineering Graduate School, Pukyong National University)
  • 이충일 (부경대학교 해양산업개발연구소) ;
  • 김현주 (부경대학교대학원 해양산업공학협동과정)
  • Published : 2007.08.31

Abstract

Effect of seawater temperature (temperature) on the production of anchovy, Engraulis japonica and laver, Porphyra tenera Kjellman, were investigated in the eastern part of South Sea of Korea (ESS). Bimonthly temperature data (Feb., Apr., Jun., Aug., Oct., Dec.) from 1980 to 2002 were collected from Korean Oceanographic Data Center (KODC) and monthly anchovy catch and laver production from 1980 to 2002 were used from published sources by the Ministry of Maritime Affairs & Fisheries, Korea. Effects of temperature on the two organisms were examined in four cases. In case of lower anchovy catch and higher laver production (1993), temperature during main spawning season of anchovy was about $0.2-0.6^{\circ}C$ lower than normal condition, and temperature during seed collecting season of laver in Namhaedo, Kojedo went down below $22.0^{\circ}C$. In case of higher anchovy catch and higher laver production (1995), optimum temperature for catch was formed in main fishing ground, temperature for seed collection was lower than $22.0^{\circ}C$, In case of lower anchovy catch and lower laver production (1996), temperature for spawning and catch was about $0.6-1.6^{\circ}C$ lower than normal condition, and temperature during seed collection in nursery was about $0.5-1.0^{\circ}C$ higher than optimum temperature for seed collection. In case of higher anchovy catch and lower laver production (1998), temperature during main fishing and spawning season was about $1.0-1.8^{\circ}C$ higher than normal condition, and temperature during laver seed collection in nursery was $1.5^{\circ}C$ higher than optimum temperature for seed collection.

Keywords

Temperature;Anchovy;Laver;South Sea of Korea;Optimum temperature

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