Method for improving overwintering survival rate and qualities of oreochromis niloticus fries

A technology for the survival rate of Jifu tilapia, which is applied in fish farming, climate change adaptation, animal feed, etc., can solve the problems of poor quality and low survival rate of overwintering, and achieve good quality, high breeding survival rate, and increase seedling growth. The effect of overwintering survival rate

Inactive Publication Date: 2014-04-23
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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Problems solved by technology

[0004] In order to solve the problem of low survival rate a

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[0011] A method for improving the overwintering survival rate of gifu tilapia seedlings. Before the seedlings are overwintering, generally in mid-November, feed with 12% to 14% fat level is prepared and fed. The fat source of the feed is mainly composed of soybean oil and fish oil. , the ratio is 4:1, the feed protein level is 32%~35%, the feeding cycle is 1 month, feeding 3 times a day (7:30 in the morning; 11:30 in the afternoon and 15:30 in the afternoon), daily injection The feeding amount is 9% to 12% of body weight. After 15 days of feeding the above-mentioned feed, the domestication of different low temperature gradients began. Using the method of adding ice cubes, set up 3 reservoirs with different low temperatures, the temperature is controlled at 16°C, 13°C and 10°C respectively, acclimatize for 5 days under each temperature gradient, and eliminate the seedlings with injuries and poor vigor. Normal feeding during acclimatization. After completing the above steps, m...

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Abstract

The invention discloses a method for improving overwintering survival rate and qualities of oreochromis niloticus fries. Before overwintering, feeds with 12% to 14% fat level are fed to the fries, and soybean oil and fish oil are blent in a proportion of 4:1 to form fat sources. Fatty acids--linoleic acids and linolenic acids which are necessary to growth of oreochromis niloticus are mainly increased so as to improve energy reserve. Low-temperature stress resistance of the oreochromis niloticus can be improved by low temperature acclimatization and the low temperature adaptability is improved. During overwintering, feeds with 1.5% to 2% compound Chinese herbal medicine are fed to the fries, so that damages of the low-temperature stress to fish bodies can be effectively relieved, the non-specificity immunity of the fish bodies is improved, and the overwintering survival rate and fry qualities are improved. Meanwhile, according to the above three steps, material selection and facility configuration are easy, the price is relatively low, processes are simple, traditional problems that overwintering costs are high, the survival rate of the fries is low, and qualities of the fries are poor are excellently solved, and environment-friendly and physically beneficial breeding requirements can be met.

Description

technical field [0001] The invention belongs to aquaculture seed cultivation technology, in particular to a set of cultivation methods capable of improving the overwintering survival rate and quality of gifu tilapia seedlings. Background technique [0002] Among the freshwater aquaculture products in Guangdong, the aquaculture output of tilapia accounts for about 40%, which is much higher than that of the four major domestic carp, snakehead, and crucian carp. The cultured species of tilapia are mainly Gifu tilapia and Oni hybrid tilapia, of which Gifu tilapia accounts for 2 / 3 of the products. Gifu tilapia has the advantages of fast growth, strong stress resistance and high meat yield, and is very popular among farmers. [0003] Guangdong has a subtropical climate, with temperatures above 18°C ​​for nearly nine months each year (from March to November), which is very suitable for tilapia farming. However, the breeding temperature of tilapia needs to be above 22°C, which...

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Application Information

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IPC IPC(8): A01K61/00A23K1/18A23K1/16A23K1/14
CPCY02A40/81
Inventor 强俊徐跑何杰李瑞伟朱志祥
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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