Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Influence of Body Size and Ambient Temperature on the Uptake Rate of Cd, Se, and Zn in the California Mussel, Mytilus californianus

개체 크기와 온도가 홍합(Mytilus californianus)의 금속 흡수율에 미치는 영향

  • 이정석 ((주)네오엔비즈 부설 환경안전연구소) ;
  • 이병권 (전남대학교 해양학과) ;
  • 이인태 (전남대학교 해양학과)
  • Published : 2004.09.01
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Abstract

A radiotracer study was conducted to evaluate the influence of body size and temperature on the uptake rates of Cd, Se and Zn in the California mussel, Mytilus californianus. Uptake rates of Cd, Se and Zn were determined simultaneously with clearance of the mussels with 3 different size classes (0.07, 0.24 and 0.73 g flesh dry weight $individual^{-1})$ and at 4 different temperatures (3, 8, 13 and $21^\circ{C})$. The weight-specific uptake rates of 3 elements significantly decreased with body size, but increased with temperature. Simultaneously measured clearance rates of mussels were closely associated with metal uptake rates. The significant association of clearance rates and metal uptake rates of mussels emphasizes the importance of functional role of water pumping activity in the metal uptake process in filter-feeding organisms.

캘리포오니아 홍합(Mytilus californianus)의 용존 Cd, Se, Zn의 흡수율에 대한 개체 크기와 수온의 영향을 평가하기 위하여 방사성 동위원소를 이용한 실험을 수행하였다. 세 개의 크기 구배(0.07, 0.24 and 0.73g; 육질부 건중량)를 갖는 홍합의 용존 금속 흡수율과 여수율은 동시에 4개의 온도 구배(3, 8, 13 and $21^\circ{C})$에서 측정되었다. 세 원소의 흡수율은 개체 크기가 증가함에 따라 유의하게 감소한 반면, 수온이 증가함에 따라 유의한 증가를 보였다. 홍합의 여수율은 전반적으로 용존 금속의 흡수율과 뚜렷한 상관관계를 보였는데, 이는 여과식자인 홍합이 용존 금속을 흡수하는 과정에 있어서 해수 여과 능력의 기능적인 중요성을 보여주는 결과이다.

Keywords

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