Hanging culture-based blue crab and green crab winter temporary culture method

Abstract

The invention relates to a hanging culture-based blue crab and green crab winter temporary culture method. Temporary culture is performed based on a blue crab culture pond, and a circular groove is dug at the bottom of the blue crab culture pond 3-6 meters away from the pond wall and serves as an excrement and bait residue gathering place. The winter temporary culture method comprises the following steps: S1, selecting blue crabs and green crabs with sound appendages and good vitality; and S2, firmly binding two chela of a single blue crab and green crab by adopting a first end of a binding belt, and fixing a second end of the binding belt on a peripheral platform of the blue crab culture pond; placing the blue crabs and green crabs along the circular groove distributed around the blue crab culture pond for temporary culture; and when the temperature is reduced in winter, enabling the blue crabs and green crabs to automatically migrate to the deep part of the circular groove. Accordingto the method disclosed by the invention, the circular groove of the blue crab culture pond is utilized, the bottom of the circular groove is the deepest away from the water surface, and the water temperature is slightly influenced along with the weather temperature; because the binding belt only binds the chela, the blue crabs and green crabs automatically migrate to the deep part of the circular groove during cooling, and the blue crabs are prevented from being frozen or killed by cold waves; and during recapture, only the binding belt needs to be recycled, and the recapture is convenient.

Description

technical field [0001] The invention belongs to the technical field of mud crab cultivation, and in particular relates to a method for temporarily raising mud crabs in winter based on hanging culture. Background technique [0002] Scylla paramamosain, commonly known as blue crab, is delicious and nutritious. It is a rare and economically important seawater crab cultured species in China, and it is also the seawater cultured crab with the largest output in my country. In recent years, the blue crab breeding industry in my country has developed rapidly. The output of blue crab farming is 158,000 tons, and the output value is as high as 26 billion. [0003] Under natural circumstances, when the water temperature drops below 15°C in winter, blue crabs will dig holes to survive the winter, making it difficult for farmers to harvest blue crabs, resulting in local blue crabs being unable to supply the market with strong demand during the Spring Festival. Therefore, farmers general...

AI Technical Summary

Problems solved by technology

However, the current method of temporary breeding of blue crabs is generally to place blue crabs in cement ponds for temporary breeding management, usually only suitable for about one month of temporary breeding, and the survival rate will decrease over time, and even cannot be temporarily raised until the eve of the Spring Festival

Other methods, such as using breeding cages, crab apartments, crab boxes, etc., are greatly limited by the temporary breeding site, the breeding area is limited, the temporary raising cost is high, or there is a disadvantage of poor resistance to sudden weather changes, the survival rate Difficult to guarantee

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