1. crayfish interplanting silver carp and silver carp (bighead carp) should be controlled at 20~30 per mu. These two kinds of fish are filter-feeding fish, which mainly feed on plankton in the water. Benefits: Both kinds of fish can feed on cyanobacteria, which has a certain positive effect on the prevention and control of cyanobacteria in crayfish ponds.
Second, crayfish interplant with mandarin fish, because mandarin fish is a carnivorous fish, mainly feeding on small miscellaneous fish in lobster ponds. The advantage of our intercropping is to remove impurities. It is suggested to put 3~5 mandarin fish per mu. If there is too much food, prawn larvae will pose a threat.
Three, crayfish interplanting allogynogenetic crucian carp, this fish is also a new species, which is artificially inseminated with Heilongjiang crucian carp as the female parent and Jiangxi Xingguo red carp as the male parent. The fish mainly feeds on plankton in the water, various ingredients and animal droppings, and is kept in crayfish ponds. Although there will be some conflicts in food, its extensive omnivorousness has played a certain role in maintaining and cleaning water quality.
Extended data
The number of fish in the crayfish pond must be well controlled, and the daily observation should be carefully done. When it is found to be over-breeding, it must be controlled manually. In addition, it is necessary to ensure that the food is sufficient and the water body is stable, so that it will not compete with crayfish for food and threaten the safety of crayfish.
Procambarus clarkii is a kind of benthic reptile. The single culture in the pond makes most of the water in the pond not fully utilized, which affects the economic benefits. Therefore, we advocate fish and shrimp polyculture or multi-species polyculture and crop rotation to improve the utilization rate and economic benefits of ponds. It should be noted that crayfish are mixed with fish. Either way, the pond needs to be equipped with an aerator.
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