Crab pond set of squid notes

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 trout in a crab culture pond, the following points must also be noted:

Pond conditions

The pond requires sufficient water, fresh water, and no pollution. The water inlet and drainage systems are separated. Under normal circumstances, as long as the ponds suitable for crab breeding can be cared for, the ponds must be sterilized strictly through clear ponds to kill the ponds before they are stocked. In addition, the pathogens in the pool must be planted with aquatic plants such as borage or black-leaf algae, Elodea, etc. around the pond. The coverage area is generally about 30% to 50% of the surface of the pond, which is conducive to providing shelling concealment for the river crab. Sites and breeding of aquatic benthic beloved crabs, but also conducive to the squid hiding in which to eat wild fish and shrimp.

Carp nesting specifications and density

The eel mainly feeds on the wild fish and shrimp in the prey pond. Its feed coefficient is about 6, so the stock of eel depends on the amount of wild fish and shrimp in the pond in previous years, generally in June of each year. In the first half of this year, 5 to 7 centimetres of carp species were stocked with 10 fish/mu to 15 fish/mu. 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.

Daily management

In the crab breeding pool, the squid is reared, and the management is still based on river crabs. The squid feed on wild fish and shrimps in the pool, playing the role of clearing the ponds. As long as the nesting density is controlled reasonably, it will be used in the breeding process. There is no need to separately feed the bait. 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 treatment

Adhering to the principle of “prevention from loss and emphasis on prevention and control.” Because catfish is a special aquatic product and crabs are crustaceans, they are more sensitive to drugs than ordinary fish. Therefore, be careful when using drugs. The choice of drug variety, the dosage should be calculated 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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