OPEN ACCESS plSSN : 0374-8111 | elSSN : 2287-8815
OPEN ACCESS plSSN : 0374-8111elSSN : 2287-8815
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kfas, vol. 55, no. 5, pp.697-704, October, 2022

Effects of Acute Toxicity of Ammonia and Nitrite to Juvenile Marbled
Eel Anguilla marmorata

최종렬·박준성·황주애·이동길·김형수*
국립수산과학원 첨단양식실증센터

  • ABSTRACT

    This study was investigated to evaluate the level of acute TAN (total ammonia nitrogen) and NO2 --N concentrations at pH levels of 6.0, 7.0 and 8.0 for 96 h in juvenile marbled eel Anguilla marmorata (total length 209.0±22.02 mm and body weight 13.0±5.01 g). The result of the present study showed that the survival rate of juvenile eel at TAN concentrations 0, 100, 200, 300, 400, and 500 ppm at pH 6.0, pH 7.0, and pH 8.0 were 100, 100, 96.7, 74.4, 31.1, and 0%; 100, 82.2, 61.1, 36.7, 0, and 0%; and 98.9, 55.6, 8.9, 0, 0, and 0%, respectively. In addition, the survival rate of juvenile eel at NO2 --N concentrations 0, 100, 200, 300, 400, and 500 ppm at pH 6.0, pH 7.0, and pH 8.0 were 100, 43.3, 21.7, 0, 0, and 0%; 100, 76.7, 65.0, 43.3, 21.7, and 13.3%; and 100, 100, 100, 88.3, 78.3; and 58.3% respectively. The 96h-LC50 at pH 6.0, 7.0, and 8.0 were 332, 235, and 167 mg/L for TAN, and 188, 296, and 711 mg/L for NO2 - -N, respectively. The acute toxicity of TAN to juvenile eel increased exponentially with increase in pH, whereas the acute toxicity of NO2 --N to juvenile ell increased with low levels of pH and lengthening of exposure time to NO2--N.

  • Keyword

    Anguilla marmorata, Total ammonia nitrogen, Nitrite, Acute toxicity, 96 h-LC50