Method for culturing swimming crabs for two batches each year

Abstract

The invention discloses a method for culturing swimming crabs for two batches each year. The culture mode is as follows: for the first batch, egg-carrying crabs are released into a nursery area in late April, large-size larvae are raised, and are transferred into a culture area in late July to early August, the males are removed with the females left, and after being cultured into roe crab products, each of which is 250g to 350g, the swimming crabs are put into the market in January or February of the next year; for the second batch, the second batch of egg-carrying crabs are released into the nursery area in early August, large-size larvae are raised, the temperature of the nursery area is kept after November to help the juvenile crabs to live through the winter, the crabs are transferred into the culture area in middle April of the next year, the female and the male are raised together, and after being cultured into meat crab products, each of which is 150g to 200g, the big crabs start to be caught with the small crabs left in June until late July. The culture method disclosed by the invention plugs the gap of supplying of swimming crabs from May to August, satisfying the demand of consumers; moreover, the utilization rate of ponds is increased, and higher economic benefit can be obtained from a culture pond with the same area.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for culturing Portunus trituratus twice a year. Background technique [0002] The swimming crab is one of the important species of Chinese aquaculture. In recent years, with the breakthrough of artificial breeding technology, the pond aquaculture industry has developed rapidly. At present, there are two main ways to cultivate the swimming crab: one is to raise seedlings from the end of April to the beginning of May, cultivate in the original pond, and fish and market before and after the Spring Festival (January-March); the other is to buy from the end of May to the beginning of June. Crab seedlings are cultivated until they are marketed around the Spring Festival (January-March). [0003] The above-mentioned breeding method is one crop a year, and the sales time is concentrated and short-lived, so it is necessary to catch wild swimming crabs to meet the market dem...

AI Technical Summary

Problems solved by technology

Therefore, from May to August, whether it is wild crabs or farmed crabs, it is difficult to buy in the market and cannot meet the needs of consumers.

[0004] In addition, the breeding method of one crop per year will have a vacant period in the breeding pond, which will inevitably lead to waste of the breeding pond

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