Fully-artificial breeding method of parent crabs of Portunus trituberculatus

Abstract

The invention provides a fully-artificial breeding method of parent crabs of Portunus trituberculatus, comprising the following steps of: selecting large female and male parents with good characters; artificially controlling the female and male parents to be mated; numbering the mated female crabs and then putting into an overwintering pond, wherein baits of an overwintering period are living clam worms; utilizing sand-filtered underground seawater and controlling the water temperature in a range of 8-10 DEG C to accelerate sexual glands to grow to be mature and ovulate; putting one parent crab with ova into a cage and then putting the cage into a breeding pond to ovulate larvae and breed in the May of the next year; culturing the larvae in one pond to the second phase of young crabs; then putting the young crabs into a cultivation pond to be cultivated, so as to realize the fully-artificial cultivation of the Portunus trituberculatus. According to the invention, the fights and injuries of male crabs are reduced and the parent breeding success rate is improved; the generation and the transmission of diseases are reduced, and the overwintering survival rate is improved; and meanwhile, the fully-artificial breeding method is also applicable to temporary cultivation of commodity crabs so that the marketing period of the commodity crabs is prolonged and the economic additional value of the cultivated crabs is improved; and the larvae are cultivated in one pond so that the fully-artificial breeding method is applicable to propagating of the population of the Portunus trituberculatus breeding population.

Description

technical field [0001] The invention relates to the field of aquatic genetics and breeding, in particular to a method for artificial cultivation of Portunus trituberculatus parent crabs. Background technique [0002] Portunus trituberculatus is one of the important species of marine cultured crustaceans in my country, with high economic value and huge market demand. Artificial breeding began in the late 1980s along the coast of my country. In recent years, the breeding industry of Portunus trituberculatus in my country has developed rapidly, with a breeding area of ​​500,000 mu and an annual output of 100,000 tons. However, at present, the parents of Portunus trituberculatus mainly rely on fishing for wild resources, which is not conducive to the protection of coastal biological resources. In recent years, with the gradual development of new species breeding and the need to increase the economic added value of products, it is particularly important to make technological br...

AI Technical Summary

Problems solved by technology

However, the selection and breeding of marine crabs such as portunus trituberculatus has just started, and the lack of mature methods for fully artificial breeding of parent crabs is the key to restricting the stable development of the industry