Method for breeding tilapia mossambica with excellent overwintering capability

Abstract

The invention provides a method for breeding tilapia mossambica with an excellent overwintering capability. The method includes the following steps of selecting tilapia mossambica which is bred to a sexual mature period before overwintering, wherein male parent fishes and female parent fishes are selected out; putting the selected parent fishes into water at the temperature of 20-25 DEG C, after 5-15 days of intensive breeding, lowering the water temperature by 0.1-0.2 DEG C per hour, carrying out observation once every 2-3 hours, and removing the parent fishes with low vitality; after the water temperature is lowered to 15-16 DEG C, raising the water temperature by 0.2-0.4 DEG C per hour until the water temperature is 20-25 DEG C; separately feeding the male parent fishes and the female parent fishes in the water at the temperature of 20-25 DEG C for overwintering. The survival rate of tilapia mossambica during overwintering can be increased, and farmers' losses caused by overwintering of tilapia mossambica are reduced.

Description

technical field [0001] The invention relates to the technical field of tilapia culture, in particular to a method for cultivating tilapia with strong overwintering ability. Background technique [0002] Tilapia, commonly known as Nanyang crucian carp, apple fish, etc., is a relatively common edible fish in my country. The living temperature range of tilapia is 15-35°C. Usually, when the water temperature is lower than 15°C, the tilapia will be in a dormant state. When the water temperature is as low as 12-13°C, the tilapia will be frostbitten. If it drops further below 12°C, it will gradually die. In the severe winter, tilapia are prone to frostbite and even death. Tilapia with poor overwintering ability have poor vitality after overwintering, and their reproductive ability is also poor during the breeding period from May to June. There are differences in cold tolerance among tilapia individuals. Selecting tilapia individuals with strong overwintering ability before overw...

AI Technical Summary

Problems solved by technology

Tilapia with poor overwintering ability have poor vitality after wintering, and t

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