Large-scale culture method of high-cold water crayfish in plateau

Abstract

A large-scale breeding method for crayfish in plateau high and cold water, comprising the following steps: Pond construction: the pond includes a central deep water area and surrounding shallow water areas, with a hardened area slope transitioning between the two; mud ridges are built in the center of the deep water area , the length of the mud ridge is not in contact with the inner wall of the pond; several water inlet pipes are added on the dam of the pond; the depth of the deep water area: 2-2.5 meters in winter and 1.2-1.5 meters in summer; crayfish are stocked; raising and feeding; Daily management and water quality management; fishing. In the present invention, through the improvement of the pond structure to ensure the smooth wintering of crayfish and the implementation of measures such as adding warm water at the beginning and end of winter to increase the water temperature and prolong the growth length of bait organisms, the survival rate of crayfish seed fattening can reach 80% in the plateau alpine zone More than 700 kg per mu yield.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for large-scale cultivation of crayfish in plateau high cold water. Background technique [0002] Crayfish is a local aquatic species in the United States, which was later introduced to China from Japan. Since it was introduced to China, it has been loved by many people. Crayfish has strong production capacity and high economic value. Therefore, many farmers in the south and east where aquaculture is developed have started crayfish farming and scaled it up. However, there are few reports on the introduction and promotion of crayfish in Northwest China. The root cause is that the harsh environment in the north has affected the growth of crayfish. In summer and early autumn, the water temperature in northern ponds has little difference between day and night, which is in line with the conditions for rapid growth of lobsters. However, the water temperature changes signi...

AI Technical Summary

Problems solved by technology

The root cause is that the harsh environment in the north has affected the growth of crayfish. In summer and early autumn, the water temperature in northern ponds has little difference between day and night, which is in line with the conditions for rapid growth of lobsters. However, the water temperature changes significantly in late autumn and winter. As it gets lower and lower, the temperature of the pond gradually drops, and the aquatic plants stop growing, which will cause hypoxia to the lobster. The water temperature is low and they will not eat, making it difficult to find food.

As a result, the survival rate of lobsters is low after overwintering, so it is difficult to form large-scale farming of crayfish under the alpine conditions of the Northwest Plateau

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