Simple method for rapidly recognizing males and females of salmon and trout juvenile fishes

Abstract

The invention discloses a simple method for rapidly recognizing males and females of salmon and trout juvenile fishes. The method comprises the following steps that firstly, the gonad of one salmon and trout juvenile fish is taken out, and the pellicle of the gonad is removed so that the internal tissue of the gonad can be exposed; secondly, water is dripped on the internal organization of the gonad; the gonad is observed under a microscope, if the cells in the gonad tissue are round or approximately round, the fish is a female fish and if the cells in the gonad tissue are arranged in a dispersed shape, the fish is a male fish. By the adoption of the simple method for rapidly recognizing the males and the females of the salmon and trout juvenile fishes, a user can recognize the sex of the juvenile fishes timely, early, and rapidly and as early as possible in the process of fry cultivation and aquaculture production of the salmon and trout fishes, and the female ratio of fry is grasped; if the female ratio is high, aquaculture production can go on, and if the female ratio is low, the fry can be abandoned timely and fry culturing or purchasing can be conducted again; therefore, large economic losses and the waste of time are avoided.

Description

technical field [0001] The invention belongs to the technical field of marine aquatic products, relates to the field of sex identification of salmon and trout, and in particular relates to a simple and convenient rapid identification method for juvenile salmon and trout. Background technique [0002] In the case of artificial breeding, salmon and trout (rainbow trout, Atlantic salmon, etc.) generally reach sexual maturity at 2 to 3 years old, and female fish generally reach sexual maturity one year later than male fish, that is, female fish have more growth periods than male fish before sexual maturity One year, so larger size commercial fish can be obtained. Undoubtedly, the all-female technology prolongs the growth time of farmed fish to a certain extent, and is more conducive to the production of more large-scale commercial fish. [0003] Research on fish reproductive biology is the basis of fish breeding, and fish sex identification technology is a key technology for ar...

AI Technical Summary

Problems solved by technology

[0005] The gonads of juvenile fish have just begun to develop, and the gonad tissue is small, so it cannot be identified by the identification method of adult fish. The traditional method generally uses tissue slice technology, but the tissue slice technology steps are cumbersome and the identification cycle is long. A large number of identification needs to spend more manpower and material resources, and various chemical substances in the operation process are more harmful to the human body

Images