不同质量浓度MS-222对红尾副鳅麻醉效果的影响

Anesthetic effect of MS-222 at different mass concentrations on Paracobitis variegatus

  • 摘要: 【目的】探究不同质量浓度间氨基苯甲酸乙酯甲磺酸盐(MS-222)对红尾副鳅(Paracobitis variegatus)的麻醉效果及其生理行为特征,为鱼类野外活体样本采集、驯养和繁育等科研生产活动提供麻醉技术并丰富鱼类麻醉理论。【方法】采用静水生物测试法,设置35.0、45.0、60.0、70.0、85.0、110.0、140.0、150.0、180.0和210.0 mg/L共10组MS-222质量浓度进行红尾副鳅麻醉试验,检测不同质量浓度MS-222药浴红尾副鳅后的麻醉和复苏阶段经过时间及呼吸频率,筛选适宜红尾副鳅驯养、繁育和疾病防治的MS-222麻醉剂质量浓度。【结果】依据MS-222麻醉红尾副鳅后其不同呼吸频率和行为特征,可将红尾副鳅麻醉程度分为应激期、轻度镇静期、深度镇静期、轻度麻醉期、麻醉期和深度麻醉期(A1~A6期) 6个麻醉阶段,将复苏过程分为复苏期1~复苏期4(R1~R4期) 4个复苏等级; 10个质量浓度MS-222麻醉均能使红尾副鳅达到A6阶段,且均能复苏至R4等级。相关分析结果表明,MS-222质量浓度与麻醉时间呈显著负相关(R2=-0.6003) (P<0.05,下同),与复苏时间呈显著正相关(R2=0.7440) ;麻醉剂量均显著影响红尾副鳅的麻醉与复苏。各质量浓度MS-222处理红尾副鳅的呼吸频率均呈波浪式变化,麻醉和复苏阶段的呼吸频率均存在差异。在充氧条件下,35.0~210.0 mg/L MS-222处理红尾副鳅的复苏率均达100.0%。【结论】不同质量浓度MS-222处理红尾副鳅在麻醉和复苏阶段的呼吸频率均存在差异,理想的麻醉浓度区间为45.0~180.0 mg/L,110.0~180.0 mg/L的MS-222可用于红尾副鳅短时麻醉,45.0~85.0 mg/L的MS-222可用于红尾副鳅较长时间麻醉。

     

    Abstract: 【Objective】This paper investigated the physiological behavior characteristics of Paracobitis variegatus and the anesthetic effects of various concentrations of 3-aminobenzoic acid ethyl ester methanesulfonate (MS-222)in order to provide anesthesia technical support for the collection of live fish samples in the wild,fish domestication and breeding, and to advance the theory of fish anesthesia.【Method】 Ten groups of MS-222 were set up with the mass concentrations of 35.0, 45.0, 60.0, 70.0, 85.0, 110.0, 140.0, 150.0, 180.0 and 210.0 mg/L to carry out the anaesthesia test of P. variegatus, using static water bioassay. Duration of anesthesia and resuscitation,and the respiratory frequency of P. variegatus under MS-222 immersion baths of different mass concentrations was measured so as to screen mass concentrations of MS-222 anesthetics suitable for domestication,breeding and disease control of P. variegatus.【Result】 Based on different respiratory frequencies and behavioral characteristics after treatment of MS-222 of P. variegatus,the anesthesia degrees could be divided into 6(A1-A6)anesthesia stages:irritability,slight sedation,deep sedation,slight anesthesia,anesthesia and deep anesthesia,and resuscitation duration was divided into 4 resuscitation levels,namely resuscitation stage 1-resuscitation stage 4(R1-R4). All the 10 mass concentrations of MS-222 could make P. variegatus reach the A6(deep anesthesia), and resuscitate to the R4 level. According to correlation analysis,significant negative correlations were found between the mass concentration of MS-222 and anesthesia time(R2=0.6003)(P<0.05,the same below),and the mass concentration of MS-222 significantly positively correlated with resuscitation time(R2=0.7440);the anesthetic dose significantly affected the anesthesia and resuscitation of P. variegatus. Different mass concentrations of MS-222 had a wavy variation in the respiratory frequency of treated P. variegatus. There were differences in respiratory frequency between anesthesia stage and resuscitation stage with different mass concentrations of MS-222. Under oxygenation,the resuscitation rate of P. variegatus treated with MS-222 at the concentration of 35.0-210.0 mg/L reached 100.0%.【Conclusion】The respiratory frequency of P. variegatus treated with different mass concentrations of MS-222 is discrepant during the anesthesia and the resuscitation stages. The ideal anesthetic concentration of MS-222 for P. variegatus is 45.0-180.0 mg/L. MS-222 at the concentration of 110.0-180.0 mg/L can be used for short-term anesthesia of P. variegatus,while MS-222 at the concentration of 45.0-85.0 mg/L can be used for long-term anesthesia of P. variegatus.

     

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