似鲇高原鳅幼鱼耗氧率和窒息点的初步研究

Study of oxygen consumption rate and asphyxiation point of Triplophysa siluorides

本文采用封闭流水式装置测溶氧的方法对似鲇高原鳅[Triplophysa siluorides(Herzenstenin)]幼鱼的耗氧率和窒息点进行了初步研究。结果表明:水温在9℃、13℃、17℃、21℃条件下,似鲇高原鳅耗氧率分别为0.224 mg/(g·h)、0.290 mg/(g·h)、0.264 mg/(g·h)、0.231 mg/(g·h)。跟据试验结果推测温度13℃为似鲇高原鳅最适生长温度。耗氧率昼夜变化显示,20:00时耗氧率最高为0.386 mg/(g·h),8:00时耗氧率最低为0.164mg/(g·h),窒息点为1.22 mg/L。

The oxygen consumption rate and asphyxiation point of Triplophysa siluorides （Herzenstenin） were measured in sealed fluid water in this paper. The results showed that： the oxygen consumption rates of T. siluo- rides were 0.224mg/ （g·h）,0.290mg/ （g·h）,0.264mg/（g＇h）,0.231mg/ （g·h） at different temperature 9℃,13℃, 17℃,21℃ ,respectively. Based on the oxygen consumption result,the optimum growth temperature of T. siluo- rides was 13 ℃. The diurnal rhythm results displayed that the oxygen consumption were 0.386 mg/（g·h） and 0.164 mg/（g·h） for 20：00 and 8：00. The suffocation point of T. siluorides was 1.22mg/L.