A method for improving the survival rate of bighead carp in salt and alkali water breeding fry

By calculating the median lethal concentration (LD50) of bighead carp fry and conducting adaptive domestication, the problem of low survival rate of bighead carp in saline-alkali waters was solved, thus improving the survival rate and economic benefits of the fry.

CN119302246BActive Publication Date: 2026-07-24HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI
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Patent Information

Application Number
CN202411590800.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-08
Publication Date
2026-07-24
Estimated Expiration
2044-11-08

AI Technical Summary

Technical Problem

In the medium-to-high salinity waters of Northeast China, silver carp fry are prone to severe stress reactions when directly released from freshwater ponds into saline-alkali waters during the spring and autumn seasons, resulting in low survival rates and poor economic benefits.

Method used

By measuring the mortality rate of silver carp fry in water bodies with different alkalinity values, calculating the median lethal concentration, and conducting adaptive domestication in freshwater ponds, the fry were first placed in low-alkalinity ponds for domestication for 5-7 days, and then released into target saline-alkali lakes or marshes for aquaculture.

Benefits of technology

It significantly improved the survival rate of bighead carp in medium-to-high salinity water, enhanced the fish's resistance to adverse conditions, prevented fish mortality caused by excessive salinity, and improved economic benefits.

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Abstract

The application relates to a method for improving the survival rate of bighead carp in salt-alkaline water breeding, and belongs to the technical field of fish breeding. The purpose of the application is to solve the problem that the fish species cultivated in fresh water ponds in the process of bighead carp breeding in medium-high salt-alkaline water in the northeast region have a severe stress reaction when being directly put into the medium-high salt-alkaline water in spring and autumn, and the individuals often die when the stress exceeds the bearing range of the fish body, resulting in low survival rate of the put fish species and poor economic benefits of the breeding. The application uses target salt-alkaline lakes, marshes and the like to prepare low-alkaline pond water with a concentration of 1 / 3-1 / 2 of the maximum alkalinity value of the bighead carp fish species in salt-alkaline water breeding, and the fish body is adaptively domesticated to enhance the stress resistance of the fish body and reduce the stress reaction of the fish species cultivated in fresh water ponds when being directly put into the medium-high salt-alkaline water. The application can obtain a method for improving the survival rate of bighead carp in salt-alkaline water breeding.
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