Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
권호 표지

Acute toxicity of wood vinegar on culture fishes

수종의 양식어류에 대한 목초액의 급성독성

  • Kim, Seok-Ryel (Dept. of Aqualife Medicine, Chonam National University) ;
  • Jung, Sung-Ju (Dept. of Aqualife Medicine, Chonam National University) ;
  • Kitamura, Shin-Ichi (Center for Marine Environmental Studies, Ehime University) ;
  • Kang, So-Young (Dept. of Aqualife Medicine, Chonam National University) ;
  • Oh, Myung-Joo (Dept. of Aqualife Medicine, Chonam National University)
  • Published : 2006.12.01
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Abstract

Application of wood vinegar in fish farms has been used for the disinfection of pathogenic microorganisms and the treatment of infectious diseases. This study was performed to know the acute toxicity of wood vinegar to carp Cyprinus carpio, flounder Paralichyhus olivaceus, rock fish Sebastes schlegeli and black sea bream Pagrus major. The 24 hr, 48 hr and 96 hr LC50 respectively were: carp 1243, 1143 and 1016 ppm; flounder 1397, 1253 and 1226 ppm; rock fish 1058, 993 and 967 ppm; and black sea bream 650, 616 and 596 ppm. Death and survival of fish exposed to lethal concentrations of wood vinegar were apparently related to massive necrosis, fusion and epithelial lifting of gill lamellar epithelium, suggesting the osmotic imbalance and lack of oxygen uptake.

최근 양식현장에서 양식기구 소독과 어병방역을 목적으로 목초액을 사용하고 있으나 목초액에 대한 정보는 거의 없는 실정이다. 본 연구에서는 목초액에 대한 어류독성을 검토하기 위하여 잉어, 넙치, 조피볼락 및 감성돔을 대상으로 독성 여부를 확인하였다. 목초액에 대한 반수치사 농도는 담수 어종인 잉어의 경우 48시간 LC50치가 1243 ppm, 넙치에서 1397 ppm으로 나타나 시험에 대상으로 한 다른 어종에 비해 높게 나타났으며, 조피볼락에서는 1058 ppm,감성돔의 경우는 LC50치가 650 ppm으로 조사되어 가장 낮게 나타났다. LC50 농도에 노출된 어체의 조직학적 관찰에서는 목초액이 처리된 모든 어체의 아가미에서 괴사, 증생 및 박리 등이 관찰되어, 아가미의 심각한 손상으로 삼투조절 및 산소공급에 문제가 있을 것으로 추정되었다.

Keywords

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