Method for marking salmon and trout by daily growth increments in otoliths

Abstract

The invention relates to an otolith daily increment labeling method for game fish, and relates to an otolith daily increment labeling method for fish. The invention solves the problems that: the prior labeling method takes time and labor, and has expensive labeling cost, harm to fish bodies and complex operation; and the label is easily lost and the labeling quantity is limited. The method comprises the following steps: controlling the water body temperature in the game fish incubation period so as to change the otolith daily increment appearance feature of the game fish and form an recognizable game fish otolith daily increment label; and setting the water body temperature in the incubation period 2 to 4 DEG C higher or lower than the normal water temperature in the game fish incubation period. The method has the advantages of time and labor reduction, safety, simple operation, lifelong reading, no harm to the fish bodies, and a large quantity of labels. According to the quantity and category of the labeled fish, the process and the method with different labeling spectrums are designed. The application of the method can reach 100 percent of colony labeling.

Description

technical field [0001] The invention relates to a method for marking fish's otolith and sun wheel. Background technique [0002] Salmon trout is a general term for salmon and trout, which belongs to cold water fish, and has ecological groups such as land-sealing type and migratory type; salmon such as salmon is a river-sea type reproductive migratory fish, and is a world-famous marine grazing fish Trout, such as rainbow trout, is a land-sealed freshwater fish and is the main breeding object of cold-water fish in the world; the two kinds of fish are closely related, and have high nutritional value and delicious meat, which have high economic value and academic research value. [0003] The process of artificial breeding of salmon is mainly to breed juveniles on a large scale, and then put them into the river waters with suitable ecological environment conditions. The juveniles descend into the river and enter the sea to grow and migrate into the released waters when they are ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of time-consuming, labor-intensive, expensive marking, serious damage to the fish body, complicated operation, easy loss of labels and limited number of markings in the existing marking methods for salmon and trout. Otolith Sun Wheel Marking Method

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