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Acute toxicity of salinity to juvenile Acipenser schrenckii and A. baerii.

ZHAO Feng1,2;ZHUANG Ping1,2;LI Da-peng3;ZHANG Long-zhen1;ZHANG Tao1   

  1. 1Key and Open Laboratory of Marine and Estuarine Fisheries of Agricultu
    re Ministry, East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai 200090, China;2Aquaculture Division, E-nstitute of Shanghai Universities, College of Aqualife Science and Technology, Shanghai Fisheries University, Shanghai 200090, China;3Fisheries College, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2007-08-21 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10

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Abstract: A comparative study was made on the acute toxicity of salinity to juvenile Acipenser schrenckii and A. baerii. The results showed that the 96 h median lethal concentration (LC50) was 14.72 for juvenile A. schrenckiiand 13.08 for juvenileA. baerii. It was deduced from the 96 h LC50 values and salinity response curves that A. schrenckii had higher salinityresistance than A. baerii. The behavioral response of the two species to higher salinities (≥14.70) exhibited five ordinal behaviors, i.e., slow swimming around the tank, manic swimming around the tank, swimming weakly, body imbalance, and movement stopping (dead). Based on the appearance time of specific behavioral response of the two species, A. baerii was more sensitive to the salinity than A. schrenckii.

Key words: Marine bacteria, Antibacterial, Cytotoxicity