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报道了华鲮幼鱼的耗氧率昼夜变化规律及其对水温、溶解氧的耐受力。结果表明:水温在21.0~24.0℃时,其耗氧率昼夜变化幅度在0.051 1~0.243 4 mg/g.h,平均耗氧率为0.131 4 mg/g.h;其呼吸高峰在2∶20、6∶20、8∶20、19∶20、23∶20出现,估计与其觅食活动规律有关;测定华鲮幼鱼生存的临界水温上限值为38.0℃、下限值为5.3℃,适宜生长的水温范围13.0~29.0℃;其窒息点溶解氧为0.13 mg/L,0.51 mg/L时出现浮头现象,建议生产中安全溶氧值应在0.73 mg/L以上。
Day-night variation of oxygen consumption rate and its tolerance to water temperature and dissolved oxygen of Juvenile Huapiao were reported. The results showed that the diurnal oxygen consumption rate varied from 0.051 1 to 0.243 4 mg / gh with the average oxygen consumption of 0.131 4 mg / gh at the water temperature of 21.0-24.0 ℃ and the peak of respiration at 2:20 and 6:20 , 8:20, 19:20 and 23:20, respectively. The estimation is related to the law of foraging activity. The upper limit of critical water temperature for survival of Juvenile Huju jujube is 38.0 ℃ and the lower limit is 5.3 ℃. 13.0 ~ 29.0 ℃. When the dissolved oxygen of asphyxia point was 0.13 mg / L and 0.51 mg / L, the floating phenomenon appeared. It is suggested that the safe dissolved oxygen value in production should be above 0.73 mg / L.