Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Toxicity of Bis(tri-n-butyltin)oxide (TBTO) on the Organ Structure of the Flounder, Paralichthys olivaceus

넙치(Paralichthys olivaceus)의 기관계 구조에 미치는 bis(tri-n-butyltin)oxide (TBTO) 독성

  • 이정식 (여수대학교 수산생명의학과) ;
  • 강주찬 (부경대학교 수산생명의학과) ;
  • 신윤경 (국립수산과학원 남해수산연구소) ;
  • 진영국 (여수대학교 수산생명의학과) ;
  • 박정준 (여수대학교 수산생명의학과)
  • Published : 2004.03.01
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Abstract

The histopathologieal effects of his(tri-n-butyltin)oxide (TBTO) on the flounder, Paralichthys otivaceus were examined by means of histological methods. The experimental fishes were exposed to 0.17, 0.36, 0.60, 3.20, 6.30, 12.50 ${\mu}g \;L^{-1}$TBTO concentrations for 42 days. Histopathological change of the fish exposed to TBTO is dependent on the exposure duration and concentration. In the lower concentrations early histological changes included activated mucous cells and chloride cells, capillary hyperemia and epithelial hyperplasia in the gill; hepatocyte activation, degeneration of bile duct and pancyeatic zymogen reduction in the hepatopancreas; and capillary hyperemia, appearance of eosinophilic cell and melano-macrophagocytes in the kidney. At the higher concentrations histological changes of dysfunctionality included epithelial lifting and deformation of the lamellae in the gill; pycnosis and cytoplasmic degeneration of hepatocyte; pycnosis of haemopoietic cell and deformation of renal tubules and glomerulus in the kidney. It is indicated that TBTO induced histopathological changes in the fish as other aquatic pollutants.

유기주석화합물이 넙치의 기관계 구조에 미치는 독성을 알아보기 위하여 넙치를 대조구와 TBTO를 첨가한 6개 농도구(0.17, 0.36, 0.60, 3.20, 6.30, 12.50 ${\mu}g \;L^{-1}$)에서 42일 동안 노출 실험을 하였다. 조직상의 변화 정도는 노출 시간과 TBTO농도의 증가에 따라 심하게 나타났다. 저농도의 TBTO 노출구에서 관찰된 초기 조직학적 변화로는 아가미에서는 점액세포와 염세포의 활성, 새판 모세혈관의 충혈, 상피층의 비후, 간췌장에서는 간세포의 활성화와 췌장 효소원과립의 감소, 담관의 변성이 확인되었으며, 신장에서는 모세혈관의 충혈, 호산성세포와 혹색 대식세포군의 출현이 관찰되었다. 고농도의 TBTO 노출구에서 관찰된 조직학적 변화로는 아가미에서는 새판 상피층의 박리와 새판의 붕괴, 간췌장에서는 간세포의 핵응축, 세포질의 혼탁 및 과립변성, 신장에서는 조혈세포의 핵응축, 사구체와 세뇨관의 붕괴 등 정상적인 기능 수행이 어려울 것으로 판단되는 조직상들이 관찰되었다. 이와 같은 결과는 TBTO는 다른 수중오염원과 마찬가지로 어류 기관계의 조직병리학적 변화를 유도한다는 것을 나타낸다.

Keywords

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