Abstract

It is well known that shellfish absorb and accumulate heavy metals in the water environment. When the concentration of the heavy metals in the water is above guideline, we find abnormal accumulation of them in the body of shellfish. This study on green oysters is an instance showing the relationship between the abnormal accumulation of heavy metal and industrial wastewaters containing it. The influence of the industrial wastewaters upon shellfish has been discussed from the statistical, physiological, and saprobiensystematic points of view, and the author wants to make clear of the absorption and accumulation mechanism of the heavy metals and physiological situation. This paper deals with the copper-contents in the meat of oysters which were collected in Changhang Bay and Daechun area, the latter being not supposed to be influenced by the water of the Kum River during the period from October 1970 to february 1971. The mean value of the copper contents in oysters caught at the sampling station in the Changhang Bay area is ranged from 851.5 to 143.1mg Cu/kg wet base, and that of Daechun area varied from 13.0 to 27.4mg Cu/kg wet base, so an evident difference is seen at a significance of $0.1\%$. It appears that one of the environmental factors making copper concentrated in the oysters of the Changhang area is due to the copper-contaning slug being discharged into the sea water by the Changhang Ore Refinery.

장항만 연안에 서식하는 굴과 대천지방에 서식하는 굴의 연체부의 동함량에 관하여 1970년 10월 부터 1971년 2월까지 4개월에 걸쳐 채집 분석했다. 이 양군간에 굴 연체부의 동함량에는 현저한 유의차가 인정되였다. 장항만 연안에 서식하는 굴은 장항제연소에서 흘러나오는 폐수와 광재에서 용출하는 동에 의하여 주로 오염되었다고 볼 수 있다. 장항만 연안에 서식하는 굴은 동함량이 $434.4{\pm}141.9mg$ Cu/kg wet base였으며, 대천지방에 서식하는 비오염된 굴은 평균 $19.0{\pm}4.9mg/kg$ wet base의 수치를 나타냈다. 끝으로, 본 실험을 도와준 최병선군과 전의식군에게 사의를 표하는 바이다.

Keywords