Method for efficiently breeding blue crabs

Abstract

The invention relates to a method for efficiently breeding blue crabs. The method comprises the following steps: performing intermediate breeding on II-stage baby blue crabs in an outdoor cement pit greenhouse; disinfecting the water for breeding through an ultraviolet lamp and mounting an oxygenating device in a breeding pond; feeding big disinfected brine shrimps at regular time; exchanging 15% water per day; after the II-stage baby blue crabs grow and become V-stage baby blue crabs, putting juvenile crabs into the breeding pond at a sex ratio of female to male being 3:1; after ending mating, fishing out the male crabs; continuously breeding the female crabs; and when the water temperature is lower than 10 DEG C, putting the female crabs into the outdoor cement pit greenhouse for temporarily breeding and putting into the market before and after the Spring Festival, thereby greatly increasing the breeding yield and economic benefit. According to the method provided by the invention, the juvenile crabs are prevented from being killed by enemies and severe environment; the use ratio of baits is increased and the happening of diseases is reduced; the breeding yield of the blue crabs is increased by 26.99% and the breeding benefit is increased by 2.39 times, by adopting the method provided by the invention; the method can be widely applied to the breeding for the blue crabs; the energy conservation and the environment protection are realized; and the economic benefit and the social benefit are obvious.

Description

technical field [0001] The invention belongs to the technical field of swimming crab cultivation, and in particular relates to a method for efficiently cultivating swimming crabs trituberculatus. Background technique [0002] Portunus trituberculatus is an important marine economic animal. Because of its fast growth, large body and delicious meat, it is deeply loved by the masses and has high economic value. Therefore, it is gradually developed as a breeding object. At present, the breeding area is 500,000 mu, and the output reaches 100,000 tons. It has become one of the leading species of marine farming in my country. In the existing portunus trituberculatus culture technology, the seedlings are generally released in early May, and the sex ratio of the portunus trituberculatus is not adjusted when the seedlings are put in. Therefore, the following problems exist: (1) the water temperature is unstable at the beginning of May, and there are many predators. The mortality rate...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of low survival rate of portunus trituberculatus cultivation and large price difference between male and female in the prior art, the technical problem to be solved in the present invention is to provide a method for efficient cultivation of Portunus trituberculatus, using the method of the present invention, phase II The intermediate cultivation of juvenile crabs in outdoor cement pool greenhouses can avoid the death of juvenile crabs from being killed by predators and harsh environments, increase the utilization rate of Artemia adult bait, and reduce the occurrence of diseases; by increasing the proportion of female crabs in the breeding pond, both Reduce the self-mutilation rate, and ensure the yellowing rate of female crabs (after the female crabs mate, the gonads begin to breed, that is, the formation of crab roe), increase the production of aquaculture and increase economic benefits; use outdoor cement pools for temporary breeding, delay the time for female crabs to go to market, and improve Economic benefits of farming

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