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Journal of fisheries science and technology v.3 no.2, 2000년, pp.111 - 117   피인용횟수: 1

Ichthyotoxicity of a Harmful Dinoflagellate Cochlodinium polykrikoides: Aspect of Hematological Responses of Fish Exposed to Algal Blooms

Kim Chang Sook    (Harmful Algal Blooms Research Division National Fisheries Research and Development Institute   ); Bae Heon Meen    (Harmful Algal Blooms Research Division National Fisheries Research and Development Institute   ); Yun Seong Jong    (Fisheries Science Museum, National Fisheries Research and Development Institute   ); Cho Yong Chul    (Harmful Algal Blooms Research Division National Fisheries Research and Development Institute   ); Kim Hak Gyoon    (Harmful Algal Blooms Research Division National Fisheries Research and Development Institute  );
  • 초록

    To clarify the ichthyotoxic mechanisms of a harmful dinoflagellate Cochlodinium polykrikoides, hematological responses of the flounder Paralichthys olivaceus and red sea bream Pagrus major exposed to this algal bloom were investigated. The mortality of red sea bream was considerably larger than that of flounder, and the threshold lethal density of C. polykrikoides to the test fish was approximately 3,000 cells/ml. Blood $PO_2$ declined in proportion to the increasing density of algal cells. The blood $PO_2$ of moribund fish was about $40-60\% of control test fish. Particularly, the fishes began to be killed when the blood $PO_2$ fell below 30-40 mmHg. However, the blood pH dropped almost 1.0 unit just before fish kill. Hemoglobin and hematocrit levels of fish exposed to C. polykrikoides of 5,000 cells/ml for 24 h and of moribund fish did not show great difference. The concentrations of plasma $Na^+$ , $K^+$ and $Cl^-$ were slightly elevated to different magnitudes except $Ca^{2+}$ and plasma osmolality was also increased in Cochlodinium-exposed fish. In the plasma cortisol level, these values of moribund flounder and red sea bream were 4- 5 times higher than those of control fish. These results suggest that the drop of blood $PO_2$ was may be one of the principal causes of fish kill by C. polykrikoides, and the changes of other hematological parameters were secondary responses elicited by the decrease in blood $PO_2$ .


  • 주제어

    Cochlodinium polykrikoides .   cortisol .   fish mortality .   harmful dinoflagellates .   ichthyotoxicity.  

  • 이 논문을 인용한 문헌 (1)

    1. 2002. "" 韓國養殖學會誌 = Journal of aquaculture, 15(2): 79~86     

 저자의 다른 논문

  • 배헌민 (2)

    1. 2009 "Detection of Fish Killing Dinoflagellates Cochlodinium polykrikoides and Karlodinium veneficum (Dinophyceae) in the East China Sea by Real-time PCR" Algae 24 (2): 105~110    
    2. 2011 "RTGC 주행제어를 위한 카메라기반 가이드라인 위치계측시스템 개발" 한국동력기계공학회지 = Journal of the korean society for power system engineering 15 (1): 72~77    

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