Method for marking grass carp otolith by fluorescent substances

Abstract

The invention relates to a method for marking grass carp otolith by fluorescent substances. According to the method, salt calcein is dissolved in water bodies, and marked solution of salt calcein solution is obtained; and fishes to be marked are put into the solution for soaking, and the marking of the fish otolith is completed. The salt calcein is adopted as the marking solution for soaking the fishes, the marking operation is completed, and the strong stress response damage and the fish body mechanical injury caused by artificial operation in the existing marking method are overcome; the investment of labor and materials is reduced; and the problem of high external hanging marker loss rate is solved. The method has the advantages that the cost performance is high, the operation is convenient, the soaking concentration and time can also be regulated according to different fishes, specifications and numbers, and the method belongs to a marking method capable of being applied to large-scale economic fish release.

Description

technical field [0001] The invention relates to a method for marking fish, in particular to a method for marking fish otoliths with fluorescent substances. Background technique [0002] Under the premise of the rapid reduction of fish resources in rivers, large-scale fish breeding and release projects organized by humans are becoming more and more frequent. To test whether artificial release can alleviate the poverty of river fishery resources, the method of marking and re-catching is usually used. , it is necessary to mark the fish before release, so as to facilitate the identification of recapture. [0003] Usually, the released fish body is marked and tracked back to detect the release effect. At present, most of the commonly used methods of marking fish are physical treatment methods, such as: fin clipping, external tags, implanted marking lines, etc. These treatment methods not only require a lot of manpower, but also do more damage to fish bodies Large, it is not con...

AI Technical Summary

Problems solved by technology

At present, most of the commonly used methods of marking fish are physical treatment methods, such as: fin clipping, external tags, implanted marking lines, etc. These treatment methods not only require a lot of manpower, but also do more damage to fish bodies Large, not conducive to large-scale release operations, and has a certain impact on the process of release and capture

Fish otoliths have not been tagged with fluorescent substances to complete the reporting of fish tagging

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