Manual induced spawning method for platichthys stellatus parental fishes

Abstract

The invention relates to the field of aquaculture, in particular to a manual induced spawning method for platichthys stellatus parental fishes. Trout gonadotrophic hormone releasing hormone analogues (S-GnRHa) and domperidone (DOM) are used for performing induced spawning on the platichthys stellatus parental fishes, and female fishes older than 2.5 years and male fishes older than 2 years are selected for being put into a parental fish breeding pond for ripening acceleration. The sexual maturity is controlled in an intensifying mode through water temperature, illumination stimulation and baits. The S-GnRHa and DOM are used for performing induced spawning on the platichthys stellats parental fishes, medication injection is performed on the female and male parental fishes two times according to weights, so that the effect of performing manual induced spawning on the platichthys stellatus parental fishes is achieved and artificial insemination is performed. According to the method, the platichthys stellatus parental fishes are matured synchronously, spawning can be performed within a preset period in a concentrated mode, the spawning quantity is large, the spawning period is shortened by 10-15 days, the insemination rate reaches 80%, the hatching rate reaches 70%, manual induced spawning is performed on the parental fishes, the success rate of performing induced spawning on the male fishes reaches 98%, and the success rate of performing induced spawning on the female fishes reaches 95%.

Description

Technical field [0001] The invention relates to the field of aquaculture, in particular to a method for artificially inducing spawning of broodstock of flounder flounder. Background technique [0002] Platichthys stellatus belongs to the order Pleuronectiformes, the family Pleuronectidae, and the genus Platichthys, also known as star-spotted river flounder. It is mainly distributed in the northern coastal waters of the Pacific Ocean, and also enters the freshwater area. It is a large euryhaline flounder fish with a weight of 2 to 4 kg. It is rich in nutrition, delicious in meat, less in bony spurs, rich in edible parts and unique in taste, and is very popular in domestic and foreign markets. Xingtu river flounder is docile and suitable for intensive farming with high breeding efficiency. And because the Xingtu river flounder is suitable for a wide range of temperature and salt, after domestication, it can be cultured in inland ponds, reservoirs, lagoons, etc., and its bree...

AI Technical Summary

Problems solved by technology

The method of artificial induction of broodstock mainly relies on injection of hormones, but the hormones and doses used in the existing methods of induction of labor cannot meet the requirements of induction of labor, and there are shortcomings such as a small amount of eggs laid, and extremely low fertilization and hatching rates of fish eggs, which cannot meet production needs.