乌苏里拟鲿的不可逆点、窒息点及其对5种常见渔药的敏感性研究

Pseudobagrus ussuriensi:the point of no return,suffocation point,and sensitivity to five aquacultural drugs

通过实验生态学方法,研究了乌苏里拟鲿(Pseudobagrus ussuriensis)的初次摄食率、不可逆点、窒息点以及对5种常见渔药的敏感性。结果表明:水温22～23℃条件下,乌苏里拟鲿第7日龄初次摄食率达到最高值100%,仔鱼不可逆点(PNR)发生在孵化后第13天;窒息点与水温呈正相关性(R=0.909 3,P<0.001)、与体质量呈负相关性(R=-0.881 6,P<0.05);水温24～25℃条件下,乌苏里拟鲿对硫酸铜+硫酸亚铁合剂(比例5:2)、高锰酸钾、硫酸铜、甲醛、氯化钠5种渔药的安全浓度分别为0.34、0.24、0.27、4.03、1135.56 mg/L,对5种药物敏感性依次排序为:高锰酸钾>硫酸铜>硫酸铜+硫酸亚铁合剂>甲醛>氯化钠。

Pseudobagrus ussuriensis was studied for its initial feeding rate, point of no return （PNR）, suffocation point, and acute toxicity of five aquacultural drugs to through an ecological method. At 22 - 23 ℃, the maximum value of the initial feeding rate was100% in the seventh day after hatching. The PNR of larvae appeared on the 13th day after hatching. The suffocation point of Pseudobagrus ussuriensis was positively correlated with water temperature （R=0.909 3, P〈0.001） and negatively correlated with body weight （R=-0.881 6, P〈0.05）. At 24 - 25℃ condition, the safe concentrations of CuSO4＋FeSO4 （Ratio 5：2）, KMnO4, CuSO4, HCHO, and NaCI to Pseudobagrus ussuriensis were 0.34, 0.24, 0.27, 4.03, and 1135.56 mg/L, respectively. The sensitivity Pseudobagrus ussuriensis toward the five commonly-used aquacultural drugs was KMnO4〉 CuSO4〉 CuSO4＋FeSO4（Ratio 5 ： 2）〉 HCHO〉 NaCl.