Raising other valuable fish in the crab breeding pond to increase the economic benefits of breeding has now become a routine method adopted by farmers to increase aquaculture efficiency. In some areas of Jiangsu Province, the main promotion in recent years is the raising of squid in a crab breeding pond. This breed of nesting has indeed brought about gratifying gains for farmers, but some farmers have blindly implemented nesting, resulting in failure. . In order to be successful in raising a squid in a crab culture pond, the following points must also be noted: Pond conditions Ponds require sufficient water, fresh water, no pollution, and separate water inlet and drainage systems. In general, ponds suitable for crab breeding can be used. Set up squid, but the pond must be sterilized strictly in order to kill the pathogens in the pool before stocking. In addition, aquatic plants such as bittergrass or black-leaf algae and Elodea must be planted around the pond. About 30% to 50% of the surface of the pond, this aspect is conducive to providing shelter for crabs and sheltering crabs from eating aquatic benthic organisms. At the same time, it is also conducive to the hunting of wild fish and shrimp. The size and density of squid squid mainly feed on wild fish and shrimp in prey ponds, and its feed coefficient is about 6, so the squid's stocking amount depends on the amount of wild squid in the pond in previous years. Under normal circumstances, in early June each year, 5 cm to 7 cm of carp species of 10 fish/mu to 15 fishes/mu are stocked. If the size is too small, their ability to catch wild fish and shrimp is weak, and the survival rate is low. If the amount of wild fish and shrimp in ponds is small in previous years, some 2 winter shad fish can be stocked in ponds to allow them to breed naturally, providing palatable bait fish. Generally, 5 to 6 groups of shad fish are stocked per mu of ponds. The ratio of male to female is 2:1. The management of crab culture in crab breeding ponds is still routine. The management is still dominated by river crabs. The carp uses the wild fish and shrimp in the pool to feed on the ponds. It plays the role of pond clearing. As long as the nesting density is controlled reasonably, then There is no need to separately feed bait during the breeding process. However, the demand for dissolved oxygen in squid is relatively high. Many cultivars often suffer from lack of oxygen due to lack of dissolved oxygen due to excessive stocking density, excessive silt in the bottom of the pond, and deterioration of water quality. Therefore, in the breeding process, it is necessary to constantly flush new water and keep the water rich in dissolved oxygen. Generally, water injection is performed every 7 days to 10 days, and water is added for 10 cm to 15 cm each time. In addition, quicklime and biological preparations must be regularly used to improve water quality. , Conditional farmers can install micropore oxygenation equipment in the pool to improve the state of dissolved oxygen in the pond. Disease prevention and control adhere to the principle of “prevention from prevention and prevention from overtreatment”. Because catfish are special aquatic products and river crabs are crustaceans, they are more sensitive to drugs than ordinary fish. Therefore, they should be used when drugs are used. Carefully choose the type of drug, and calculate the dose accurately. In the summer hot season, it is best to use quicklime or biological agents to improve the water environment every 15 days to 20 days to reduce the incidence of salmon and crab.

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