The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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High-resolution Stable Isotope Analyses of the Otolith of Argyrosomus argentatus

고해상 시료 채취를 통한 보구치 이석의 안정동위원소 분석

  • Khim, Boo-Keun (Division of Earth Environmental System, Pusan National University) ;
  • Lee, Tae-Won (Department of Oceanography, Chungnam National University)
  • 김부근 (부산대학교 지구환경시스템학부) ;
  • 이태원 (충남대학교 해양학과)
  • Published : 2008.02.29
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Abstract

Using micromill, discrete carbonate powders from the otolith of Argyrosomus argentatus were sampled along the growth band, and high-resolution stable isotope profiles were obtained. The ${\delta}^{18}O$ and ${\delta}^{13}C$ values are increasing gradually from the core to the margin. However, such increases do not seem to be attributed to the environmental property changes during the growth, but to the dominant effect of metabolic carbons during the early growth, and then, the isotopic composition seems to be equilibrium to the environmental condition. This paper allows the diverse applicability of high-resolution isotope research to the fish otoliths in the future.

미세채취기를 이용하여 보구치(Argyrosomus argentatus)의 이석으로부터 탄산염 시료를 매우 조밀하게 채취하여 성장에 따른 고해상의 안정동위원소비의 변화를 조사하였다. 이석의 ${\delta}^{18}O$값과 ${\delta}^{13}C$값은 성장에 따라 점진적으로 증가하는 경향을 보였다. 그러나, 이러한 증가는 서식환경의 변화에 의한 것이 아니라, 초기성장동안 어류의 생리적인 작용에 의한 영향을 많이 받다가 점차적으로 줄어들면서 해양환경에 평형을 이루는 것으로 해석된다. 이 연구 방법과 결과는 앞으로 다른 어류의 이석으로부터 고해상의 안정동위원소 변화를 획득하여 어류의 성장과 서식환경의 변화를 연구하는데 적용할 수 있는 가능성을 제시한다.

Keywords

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