Method for breeding red green crabs in pond

Abstract

The invention discloses a method for breeding red green crabs in a pond. On-line monitoring of pond water dissolved oxygen amount is started in 30-60 days before the red green crabs come into the market, a critical value is set, and when the pond water dissolved oxygen amount is lower than the critical value, an aerator is started to ensure that the pond water resolved oxygen amount is higher than the critical value. The critical value is 3.5mg / L to 4.5mg / L. Food containing astaxanthin is fed to the red green crabs in 30-60 days before the red green crabs come into the market, and each crab is made to intake more than 11.5g of astaxanthin. By means of the method, sufficient dissolved oxygen in the crab pond can be guaranteed, negative effects on astaxanthin deposition from changes of environmental factors are weakened, the organoleptic quality and the taste of the crabs in ponds can be improved, and therefore economical benefits of breeding crabs in the pond are increased. The method is simple in operation, easy to implement and low in cost.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for cultivating red crabs in ponds. Background technique [0002] River crab, scientific name Chinese mitten crab, is a traditional freshwater aquatic product in my country. In recent years, with the continuous improvement of people's living standards, the consumption demand for river crabs, especially red crabs, has continued to expand. At present, the production of river crabs has exceeded 593,000 Ton. [0003] The water depth of the lake is suitable, the aquatic plants grow luxuriantly, and the natural conditions are superior. It has always been a good fattening place and breeding ground for river crabs. However, due to the lack of planning and management measures, many lakes have too large a network area, which seriously damages the lake resources and leads to a sharp decline in resources. Overfishing by humans has affected the aquaculture environment...

AI Technical Summary

Problems solved by technology

[0004] However, due to the limitation of the ecological environment of the pond, the sensory quality of the red crab raised by imitating the natural ecological technology is still inferior to that of the red crab raised in the lake, mainly because the color of the red crab paste (hepatopancreas) raised in the pond is not bright enough The color of the crab shell is relatively dull after cooking, not as red as the river crab in the lake; the taste is not as fresh and sweet as the red cream crab raised in the lake, and the market price of the red cream crab is determined by its quality and specifications. The improvement of people's demand for high-quality red crab