MS-222对细鳞鲑和美洲红点鲑的麻醉效果研究

通过测定不同质量浓度MS-222对细鳞鲑和美洲红点鲑的麻醉效果，检测麻醉时鱼的呼吸频率以及空气暴露时长对鱼体复苏的影响，探究两种鱼类在渔业生产和科研实验中的最适麻醉剂浓度。结果显示：当MS-222质量浓度为80、100 mg/L时，细鳞鲑麻醉所需的时间显著少于40、60 mg/L浓度组，而显著多于其余浓度组(P<0.05)。当MS-222质量浓度为100 mg/L时，细鳞鲑的复苏时长最短(P<0.05)。当MS-222质量浓度为80 mg/L时，美洲红点鲑麻醉所需的时间显著少于40、60 mg/L浓度组，而显著多于其余浓度组(P<0.05)。当MS-222质量浓度为100 mg/L时，美洲红点鲑的复苏时长显著大于40、60和80 mg/L浓度组，而显著小于其余浓度组(P<0.05)。比较MS-222对两种鱼的麻醉效果，美洲红点鲑对MS-222更为敏感。两种鱼的呼吸频率总体上都随着麻醉程度的加深而下降，当空气暴露时长少于5 min时，细鳞鲑的复苏时长先减少后增加，美洲红点鲑的复苏时长则呈逐渐减少趋势。

The anesthetic effect of MS-222 on Brachymystaxlenok and Salvelinus fontinalis

The respiratory effect of different concentrations of MS-222 and their effect on respiratory rate and resuscitation of Brachymystax lenok and Salvelinus fontinalis were measured to explore the optimum anesthetic concentration used in the fishery production and scientific research experiments of these two fish species.The results showed that when the concentration of MS-222 was 80 and 100 mg/L,the anesthetic times of B. lenok were significantly shorter than that of 40 and 60 mg/L of MS-222,but significantly longer than that of other MS-222 groups,and the resuscitation time was the shortest when the concentration of MS-222 was 100 mg/L.When the concentration of MS-222 was 80 mg/L,the anaesthesia time of S. fontinalis was significantly shorter than that of 40 mg/L and 60 mg/L of MS-222,but significantly longer than that of other MS-222 groups.When the concentration of MS-222 was 100 mg/L,the recovery time of S. fontinalis was significantly longer than that of 40 mg/L,60 mg/L and 80 mg/L of MS-222,but significantly shorter than that of other MS-222 groups(P<0.05).For difference between species,S. fontinalis was more sensitive to MS-222.When the air exposure time was 5 min,the recovery time of B. lenok decreased at first and then increased with the increase of MS-222 concentration,and the recovery time of S. fontinalis decreased gradually with MS-222 concentration increasing.