Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Distribution of the Anchovy Eggs Associated with Coastal Frontal Structure in Southern Coastal Waters of Korea

한국 남해 연안 전선구조에 따른 멸치 알의 분포

  • 김주일 (국립수산과학원 남해수산연구소) ;
  • 김진영 (국립수산과학원 남해수산연구소) ;
  • 최용규 (국립수산과학원 남해수산연구소) ;
  • 오현주 (국립수산과학원 남해수산연구소) ;
  • 추은경 (국립수산과학원 남해수산연구소)
  • Received : 2005.06.13
  • Accepted : 2005.09.01
  • Published : 2005.09.30
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Abstract

Variation of anchovy spawning grounds was analyzed based on egg distribution and oceanographic factors in southern coastal waters of Korea in April, June, and August of 2003 and 2004. Environmental factors showed a range of $10.2{\sim}30.7^{\circ}C$ in surface temperature, 25.7~34.7 in surface salinity, $0.14{\sim}0.67{\mu}g/L$ in chlorophyll-a, and $111.52{\sim}262.37mg/m^2$ in zooplankton biomass. Eggs were mainly distributed in temperatures of $14.7{\sim}26.9^{\circ}C$ and salinities of 31.0~34.6 in accordance with seasonal variation of temperature and salinity. Egg density increased in accordance with the high level of zooplankton biomass during the summer season. Anchovy spawning grounds during August of 2004 tended to concentrate in the outward front area between offshore warm-water and coastal cool-water masses.

한국 남해안에서 2003년~2004년의 4월, 6월, 8월에 멸치 알의 분포 및 해양환경 특성을 비교하고 냉수대 형성과의 관계를 분석하였다. 조사해역의 수온은 $10.2{\sim}30.7^{\circ}C$, 염분은 25.7~34.7, 클로로필은 $0.14{\sim}0.67{\mu}g/L$, 동물플랑크톤은 $111.52{\sim}262.37mg/m^3$의 범위였다. 멸치 알은 수온 $14.7{\sim}26.9^{\circ}C$와 염분 31.0~34.6 범위에서 주로 나타났고, 봄에서 여름으로 진행될수록 고수온과 저염분역에서 출현하였으며, 동물부유생물 생산의 증가와 함께 알의 평균분포밀도도 높아졌다. 2004년 8월의 멸치산란장은 외양의 난류수와 연안 냉수대간의 수온전선 외해측 해역에 집중되는 경향을 보이므로 연안역의 냉수대형성이 멸치 산란장분포의 제한요인이 되는 것으로 분석되었다.

Keywords

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