Method for identifying artificial release population and a natural wild population of salmon

Abstract

The invention discloses a method for identifying an artificial release population and a natural wild population of salmon, comprising the following steps of: sample pretreatment, electronic microprobeanalysis, data analysis and population discrimination. The method comprises the steps of collecting regression population samples of the salmon, selecting sagitta to carry out otolith microchemical analysis, carrying out quantitative line analysis on the sagitta by adopting an electronic microprobe technology, and calculating Rf1, RL and RC values of salmon otolith as the main judgment basis, verifying and checking the regression population of the salmon according to the method. The discriminant success reaches 100%. In addition, the artificial propagation population and the natural population can be effectively identified based on the difference between the current cultivation process of the released salmon fry and the wild hatching conditions of the natural population salmon, and additional mark on the released salmon fry is not required, so that the artificial propagation population and the natural population can be effectively identified, the limitation of the condition of the salmon marking work can be overcome, and the damage of the marking work to the salmon body can be avoided.

Description

technical field [0001] The invention relates to the technical field of fish identification, in particular to a method for identifying salmon artificially released populations and natural wild populations. Background technique [0002] Salmon is a typical anadromous fish, which is widely distributed in the freshwater rivers of the North Pacific and coastal countries. In recent years, due to habitat destruction, overfishing and other factors, the resources of salmon have declined seriously. In order to protect In order to scientifically evaluate the status quo of salmon resources and the effect of artificial release of salmon, it is first necessary to monitor and evaluate the return population of salmon Effective identification with natural wild populations, and then in-depth analysis of the fish multiplication and release return catch rate, the proportion of multiplication populations, and the biological and genetic diversity of the two populations, it can be seen that the id...

AI Technical Summary

Problems solved by technology

[0003] At present, the marking method is used to mark the released populations in the work of the proliferation and release of salmon, so as to effectively identify them in the follow-up monitoring work of returning populations. Due to limited conditions, it is difficult to find a very efficient and convenient method, and the working conditions of some release stations are limited, and some marking methods cannot be used, thus affecting the follow-up evaluation work;

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