Ecological comprehensive breeding method of cherax quadricarinatus-ctenopharyngodon idellus-hydrilla verticillata

Abstract

The invention belongs to the technical field of aquaculture, and discloses an ecological comprehensive breeding method of cherax quadricarinatus-ctenopharyngodon idellus-hydrilla verticillata; the preparation before dropping fries mainly comprises pond selection, pond clearing, water grass transplanting, water inflow testing, net cage setting and the like; young shrimps dropping and management; ctenopharyngodon idellus stocking; aquaculture management mainly comprises scientific bait casting, water quality management, anti-escape, anti-enemy harm and the like; fishing harvest of cherax quadricarinatus and ctenopharyngodon idellus. The hydrilla verticillata can provide a shelter and natural botanical bait for cherax quadricarinatus, and in addition, can purify water, increase dissolved oxygen and lower water temperature so as to create a good ecological environment. In the early stage of breeding, ctenopharyngodon idellus feed on artificial feed, and residual bait feces sink to the bottom of water and can be eaten by cherax quadricarinatus, the bottom of a net cage becomes a food intake and sheltering place for cherax quadricarinatus, the fertility of the pond can be improved, and the survival rate and growth rate of cherax quadricarinatus are conducive to being improved; in the late stage of breeding, ctenopharyngodon idellus mainly feed on hydrilla verticillata, the comprehensive utilization of aquatic plants is realized, and the adverse effects caused by the overgrowth of the aquatic plants are avoided.

Description

technical field [0001] The invention belongs to the technical field of aquatic animals, and in particular relates to an ecological comprehensive breeding method of red-clawed crayfish-grass carp-hydril algae. Background technique [0002] Cherax quadricarinatus (Cherax quadricarinatus) belongs to the order Decapoda (Decapoda), Parastacidae (Parastacidae), and the genus Cherax (Cherax). It is native to the streams in the tropical area of ​​northern Australia. It looks like a lobster in the sea, also known as Australia. Freshwater lobster is one of the most valuable freshwater shrimps in the world. Artificial breeding began in 1971, and it is one of the best freshwater shrimps. The shrimp lives in fresh water all its life, is omnivorous, has a relatively fast growth rate, and can reproduce and grow naturally in fresh water. Red claw crayfish are big and plump, with fast growth speed, and the maximum can grow to about 600 grams. After 5-6 months of artificial breeding, the in...

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Problems solved by technology

[0004] To sum up, the existing problems in the prior art are: the monoculture mode of red-clawed crayfish, severe killing, deterioration of water quality and substrate in the later stage of cultivation, low breeding success rate, and low breeding yield; common planting of aquatic plants to breed red-clawed crayfish , Aquatic plants tend to overgrow and often lead to the reduction of other aquatic plants and animals, the water quality is thin, the growth rate of crayfish is slow, and aquatic plants cover the water surface, which can easily lead to the death of crayfish due to hypoxia

How to rationally utilize the advantages of aquatic plants to provide shelter and plant-based feed for crayfish, play a role in regulating water quality and improving bottom quality, and at the same time avoid the problems of thin water and insufficient dissolved oxygen at the bottom caused by over-breeding of aquatic plants. Technical Difficulties in Crawfish Farming

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