Method for massively breeding crays in severe-cold water of highland

Abstract

A method for massively breeding crays in severe-cold water of a highland includes steps of building a pond comprising a central deep water area and a peripheral shallow water area which are in transition through a hardened zone slope; putting up a mud ridge at the center of the deep water area in length not contacting with the inner wall of the pond; additionally arranging a plurality of water inlet pipes on a small reservoir of the pond; keeping the depth of the deep water area in 2-2.5 meters in winder and 1.2-1.5 meters in summer; breeding crays outside; feeding and casting; performing daily management and water quality management; fishing. By modifying the pond structure to guarantee that the crays smoothly overwinter and injecting warm water into the pond in the early and late winter so as to increase water temperature and prolong growth length of food organisms, fatting and survival rate of juvenile crays reaches more than 80% in the severe cold regions of the highland, and yield per mu reaches more than 700 kilograms.

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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