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Effects of Thermal Effluent from Nuclear Power Plant on Growth of Sea Squirt, Haiocynthia roretzi

원자력발전소 온배수에 따른 우렁쉥이의 성장

  • Kim Seong Gil (Department of Aqua tic Life Medicine, Pukyong National University) ;
  • Kwak Hi Sang (Marine Environment and Climate Change Laboratory) ;
  • Kang Ju Chan (Department of Aqua tic Life Medicine, Pukyong National University)
  • 김성길 (부경대학교 수산생명의학과) ;
  • 곽희상 (한국해양연구원 해양환경) ;
  • 강주찬 (부경대학교 수산생명의학과)
  • Published : 2002.01.01

Abstract

To understand the effect of heated effluent from a nuclear power plant on marine organism, experimental culture of Halocynthia roretzi was carried out at heated effluent of Wolsung nuclear power plant from January to December 1996. Temperature was $11.2\~27.9^{\circ}C$ and salinity was $32.54\~34.59\%_{\circ}$ during the culture period, The Growth of H. roretzi on lower area of Bonggil-ri (St. 1) was not normal in height, breadth and weight due to heated effluent. Daily growth rate (DGR) of H. roretzi about Kampo area (St, 4) was significant other station, and St. 1 was significant from other station except St. 4, Mytilus edulis was major fouling organism (over $90\%$) that were M. edulis, Dideninum moseleyi, Styela clava in experiment culture farm. St. 1 was higher (mean 143 individual) and St. 4 was lower (mean 56 individual) appearance attached of M. edulis. Growth of H. roretzi reduced when attached number of M. eduiis was increased, because correlation between DGR and number of M. edulis was negative.

원자력 발전소의 온배수로 인한 우렁쉥이, Halocynthia roretzi에 미치는 영향을 파악하기 위하여 1996년 1월부터 12월까지 온 배수 배출해역을 중심으로 시험양식장을 설치하여 성장을 검토하였다. 양식기간동안 수온은 8월에 정점 1의 표층에서 $27.9^{\circ}C$ 까지 상승하였으며, 염분농도는 모든 정점에서 $32.54\~34.59\%_{\circ}$를 나타냈다. 우렁쉥이의 성장은 정점 4에서 가장 좋았으며, 온배수의 영향을 받은 정점 1에서 가장 좋지 못하였다. 우렁쉥이의 체고 및 체중에 대한 일일 성장률은 대조구 (정점 4)에 비해 모든 정점에서 유의한 감소를 나타냈으며, 정점 1은 정점 2와 3에 비해서도 유의한 감소를 나타냈다. 우렁쉥이 양식장에 출현한 부착생물은 진주담치 (Mytilus edulis), 횐덩이멍게 (Dideninum moseleyi), 미더덕 (Styela clava)등이 있으며, 그 중 진주담치가 전체 출현 종의 $90\%$ 이상 차지하였다. 진주담치의 출현은 정점 1이 평균 143개체로 가장 많이 출현하였으며, 정점 4에서 평균 56개체로 가장 적게 출현하였다. 우렁쉥이의 체고, 체중의 일일 성장률과 진주담치의 출현수 사이에는 음의 상관관계를 나타내어 진주담치의 출현이 증가할수록 우렁쉥이의 성장이 감소하였다.

Keywords

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