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研究切鳍、荧光、挂牌等5种标志方法对鲢鱼(Hypophthalmichthys molitrix)的存活、生长及脱标的影响,比较观察了标志鲢鱼的活动情况。研究结果,切鳍标志的鲢鱼存活率和标志保持率最高,为88.3%和95.0%;其次为荧光标志的,为93.3%和81.7%;挂牌标志的最低,为75.0%和70.0%。不同标志方法对鲢鱼的生长有一定的影响,3种切鳍标志方法中,以切尾鳍的日增重率、日增长率最高,分别为19.78%、1.69%;其次为荧光标志的,分别为18.78%、1.64%;挂牌标志的最低,分别为14.52%、1.43%。综合分析认为,鲢鱼切尾鳍标志是5种标志方法中较为可行的标志方法,经严格消毒处理,暂养10 d后进行放流。
To investigate the effects of 5 methods of fin-cutting, fluorescence and trapping on the survival, growth and shedding of silver carp (Hypophthalmichthys molitrix), the activities of silver carp (IC50) were observed. The results showed that the survival rate of silver carp and the retention rate of silver carp were the highest, which were 88.3% and 95.0%, followed by the fluorescent markers, which were 93.3% and 81.7%, and the lowest ones were 75.0% and 70.0% respectively. The results showed that the growth of silver carp was affected by different signs and methods. Among the three methods, the daily growth rate of cut fin was the highest, which was 19.78% and 1.69% respectively, followed by the fluorescent markers 18.78% and 1.64%, respectively. The lowest of the listed indices was 14.52% and 1.43% respectively. Comprehensive analysis shows that the silver carp tail fin sign is a more feasible method of five signs of the method, the strict disinfection, holding 10 d after release.