氯化铵、亚硝酸钠及硫化钠水平对缢蛏存活的影响

Effects of Ammonium Chloride, Sodium Nitrite and Sodium Sulfide Levels on Survival of Sinonovacula constricta

研究氯化铵、亚硝酸钠和硫化钠水平对缢蛏(Sinonovaculaconstricta)存活的影响,共3个实验:实验1研究了氯化铵水平(0、100、158、251、398、631、1000和1585mg/L)对缢蛏存活的影响,发现随氯化铵水平的升高,缢蛏存活率呈下降趋势;在24、48、72和96h,LC50分别为515.65、163.44、104.99和85.48mg/L,安全浓度为4.93mg/L。实验2研究了亚硝酸钠水平(0、4、10、25、63、158、398和1000mg/L)对缢蛏存活的影响,发现随亚硝酸钠水平的升高,缢蛏存活率呈下降趋势;在24、48、72和96h,LC50分别为713.00、217.07、87.90和23.61mg/L,安全浓度为6.04mg/L。实验3研究了硫化钠水平(0、13、25、50、100、200、398、794、1585、3162和6310mg/L)对缢蛏存活的影响,发现随硫化钠水平的升高,缢蛏存活率呈下降趋势;在24、48、72和96h,LC50分别为3843.18、2072.71、1011.95和306.30mg/L,安全浓度为180.87mg/L。

Three experiments were conducted to determine the effects of ammonium chloride, sodium nitrite and sodium sulfide levels on survival of Sinonovacula constricta. The effect of ammonium chloride （0, 100, 158, 251, 398, 631, 1000 and 1585mg/L） on survival was investigated in experiment 1 and the results indicated that the survival rate decreased with increasing ammonium chloride levels, and LC50 were 515.65, 163.44, 104.99 and 85.48mg/L at 24, 48, 72 and 96h, respectively, safety concentration was 4.93mg/L. The effect of sodium nitrite （0, 4, 10, 25, 63, 158, 398 and 1000mg/L） on survival was investigated in experiment 2 and the results indicated that the survival rate decreased with increasing sodium nitrite levels, and LC50 were 713.00, 217.07, 87.90 and 23.61mg/L at 24, 48, 72 and 96h, respectively, safety concentration was 6.04mg/L. The effect of sodium sulfide （0, 13, 25, 50, 100, 200, 398, 794, 1585, 3162 and 6310mg/L） on survival was investigated in experiment 3 and the results indicated that the survival rate decreased with increasing sodium sulfide levels, and LC50 were 3843.18, 2072.71, 1011.95 and 306.30mg/L at 24, 48, 72 and 96h, respectively, safety concentration was 180.87mg/L.