Crab pond nest crayfish notes

Crab-pool crayfish generally have a good effect in the first year. In the second year, the crayfish remaining in the pool have a destructive effect on the aquatic plants in the germination period, and it has a great influence on the crab cultivation in the following year. Therefore, from August to October, the lobster's fishing power should be increased, and the preserved seedlings or broodstock should be kept in the ditch for the purpose of lightening the ecological damage to crab ponds.
The coverage of aquatic grasses in crab ponds is usually over 40%, and the ecological conditions are suitable for the growth of crayfish. However, the production of crayfish in crab ponds is not high, and occasionally, a small number of shrimp deaths may occur. This may result in the stocking of shrimp in the pond. related. Green lobsters are very fertile and will kill freshly clam-shelled crayfish larvae, which restricts the crayfish's living space and yield. Therefore, it is better not to nest green prawn after nesting crayfish.
Crab pond nesting crayfish should not be one-sided pursuit of crayfish production, crayfish per mu yield is generally controlled below 60 kg is appropriate, over-reliance on crayfish will not only increase the occurrence of crab disease, but also the residual food and the pool The destructive effects of cockroaches will also increase, so crayfish nesting crayfish should control the reasonable stocking density. In general, 500 to 800 sticks of crabs, 100 to 150 sticks/kg, and 1000 to 3,5 to 15 grams/tail of crayfish can be harvested. Each year, 50 kg of crabs and 50 to 60 kg of crayfish can be harvested per mu.

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