Portunus trituberculatus summer green crab cultivation method

Abstract

The invention discloses a portunus trituberculatus summer green crab cultivation method. The method includes the steps of 1, portunus trituberculatus adult crab cultivation, wherein female young crabs and male young crabs are separately and independently bred till the female crabs reproduce and are unshelled, and adult crabs are cultivated; 2, overwintering breeding, wherein the adult crabs get into an overwintering stage after being cultivated, and the female adult crabs and the male adult crabs continue to be separately bred; 3, mating and sexual gland culture, wherein on April to June of the next year, the water temperature is controlled to range from 18 DEG C to 22 DEG C, the overwintered adult crabs are subjected to mixed breeding according to the ratio of the female adult crabs to the male adult crabs being (1.5-2.5):1, the female adult crabs and the male adult crabs are paired and mated, the mated female crabs are bred at the water temperature of 20-25 DEG C for 30-50 days, the sexual glands of the female crabs fully develop, and the sexual gland index reaches 5% or above. By means of the method, portunus trituberculatus is subjected to female and male separate breeding, it is effectively avoided that the portunus trituberculatus is mated and develops in autumn and winter, the portunus trituberculatus is mated out of season by manually regulating the water temperature, and summer green crabs with fully developing sexual glands can be smoothly cultivated and obtained.

Description

technical field [0001] The invention belongs to the technical field of crab cultivation, and in particular relates to a method for cultivating Portunus trituberculatus in summer. Background technique [0002] Portunus trituberculatus (Portunus trituberculatus) is one of the main marine cultured crabs in my country. It has important economic value and nutritional value, and its crab is deeply loved by the general public. Due to the increase in market demand and the decrease in wild resources, the Portunus trituberculatus aquaculture industry has developed rapidly in my country’s coastal areas since the 1990s. In 2013, the artificial breeding output was nearly 109,600 tons. However, artificially bred Portunus trituberculatus usually mates from September to November, and it takes 2 to 3 months after mating to reach the level of gonads. Therefore, the market time is mainly concentrated after New Year’s Day to before the Spring Festival, only 1 to 2 months. The listing cycle is ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that artificially cultured portunus trituberculatus has a short marketing cycle (only 1 to 2 months) and concentrates on the market in January to February, and provides a method for cultivating portunus trituberculatus in summer. Control the mating and gonad development of swimming crabs, adjust the time of gonad development of swimming crabs, and achieve the purpose of listing live crabs in anti-season (summer), thus opening up a new way for balanced marketing of swimming crabs