Method and special device for rapidly identifying wild large yellow croaker

Abstract

The invention discloses a method for rapidly identifying a wild yellow croaker, comprising the steps of measuring eye diameter, head length, body height, body length, lip length, head length, caudal peduncle height and caudal peduncle length and screening out the wild yellow croaker according to a screening standard, wherein the ratios of the eye diameter to the head length, the body height to the body length, the lip length to the head length and the caudal peduncle height to the caudal peduncle length are calculated. The invention also discloses a special device with the method, comprising a machine base provided with a conveyer belt, wherein the upper edge of the machine base is provided with a glass plate so that the conveyer belt, the machine base and the glass plate form a tube body cavity the upper side of which is transparent; a support is arranged at the middle part of the side of the machine base and is provided with a video camera; the support is also provided with a diffuse reflection light; the machine base near the discharging end of the conveyer belt is provided with sorting holes; a sorting device is arranged near the discharging end of the conveyer belt; and the sorting device and the video camera are connected with a control computer. The special device has the advantages of high sorting efficiency, accuracy in sorting and less harm to the croaker body.

Description

technical field [0001] The invention relates to a fixed sleeve for living body marking, in particular to a rapid identification method for wild large yellow croaker and a special device thereof. Background technique [0002] Large yellow croaker Pseudosciaena crocea (Richardson), commonly known as yellow croaker, yellow croaker, and big fresh, is one of the traditional "four seafood" in my country. Because of its delicious meat and rich nutrition, it has always been regarded as a high-end seafood in my country. However, in recent years, due to overfishing and unreasonable utilization of fishery resources, the resources of large yellow croaker in my country have declined seriously and are almost exhausted. After several years of hard work, my country's large yellow croaker aquaculture industry has achieved remarkable results, and has now developed into a major marine aquaculture industry in my country. With the development of the large yellow croaker farming industry and the...

AI Technical Summary

Problems solved by technology

For example, the problem of large yellow croaker seedlings. Farmed large yellow croakers often show poor stress resistance, slow growth, and weak overwintering ability, which not only greatly prolongs the large yellow croaker breeding cycle, but also increases the risk of breeding and seriously affects the production of farmers. Enthusiasm, this is not only related to the fact that most of the large yellow croaker fry are from Fujian and Guangdong, but also related to the germplasm degradation caused by the long-term cultivation of large yellow croaker. At present, our province has not yet cultivated a high-quality and stress-resistant large yellow croaker variety with practical value. , and there is almost no practice of cultivating good breeds

Another example is the problem of large yellow croaker breeding facilities. Cages are currently the main form of large yellow croaker farming. However, due to the unique sea conditions in our province, the water is turbulent and is greatly affected by typhoons.

The breakage of the cages caused the escape of farmed large yellow croakers, making it difficult to identify the catches. Therefore, it is of practical significance to develop a device that can continuously identify wild populations

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