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All-year-round artificial propagation method of Tilapia aurea

A technology of artificial reproduction and tilapia, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of affecting breeding efficiency, affecting breeding effect, late seedling production season, etc., and achieving high fertilization rate and hatching rate , the effect of reducing the water temperature of the pond and prolonging the breeding season

Active Publication Date: 2012-08-22
广东省淡水名优鱼类种苗繁育中心
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AI Technical Summary

Problems solved by technology

Affected by natural conditions, especially the weather, the emergence season is late and the emergence time is concentrated, which cannot meet the needs of the tilapia industry for balanced product listing.
Due to the obstacles in the traditional breeding technology, the seedling production season of the leading species that earns foreign exchange in our province is late, which affects the improvement of breeding benefits
Under natural conditions, the breeding season of tilapia in our province is from April to October, and in order to seize time, farmers hope to release seeds as early as possible in spring, resulting in a very tight spring release of seedlings, which is difficult to meet the demand. Many farmers Early purchase of seedlings from Hainan, the quality is uneven, which seriously affects the breeding effect

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1) The conditions of the broodstock pond: the water surface area is 5 mu, the bottom of the pond is pot-shaped (the bottom of the pond is low in the middle, and the surroundings are higher near the edge of the pond, which is convenient for the broodstock to nest and spawn by the pond), and the water depth is 1.5 meters. With 2 broodstock ponds as a group, iron frames and steel wires were used to build plastic greenhouses in winter and spring, and plastic films were removed in summer and autumn and replaced with shading nets. Use a 5 kilowatt air compressor to increase oxygen in each broodstock pond through plastic pipes and microporous pipes.

[0023] 2) Breeding and breeding of broodstock: Select broodstock of New Jifu tilapia with an average weight of 1000 grams, and mix them in a breeding pond according to the ratio of male to female 2.6:1. Among them, 1800 female broodstock and 700 male broodstock are stocked. The density is 500 kg / mu, the breeding water temperature...

Embodiment 2

[0029] 1) The conditions of the broodstock pond: the water surface area is 8 mu, the bottom of the pond is pot-shaped, and the water depth is 2 meters. With 2 broodstock ponds as a group, iron frames and steel wires were used to build plastic greenhouses in winter and spring, and plastic films were removed in summer and autumn and replaced with shading nets. Use a 5 kilowatt air compressor to increase oxygen in each broodstock pond through plastic pipes and microporous pipes.

[0030] 2) Breeding and breeding of broodstock: select broodstock of New Jifu tilapia with an average weight of 850 grams, and mix them in a breeding pond according to the ratio of male to female at 3:1. Among them, there are 4500 female broodstock and 1500 male broodstock. The polyculture density is 600 kg / mu, the culture water temperature is 23-30°C, the salinity is less than 5‰, and the pH value is 6-8.5. The broodstock are fed with uniform brand tilapia feed containing 32wt% crude protein (Zhongshan,...

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Abstract

The invention discloses an all-year-round artificial propagation method of Tilapia aurea. The method can improve spawning rate, fertilizing rate and hatching rate of parent fishes, and produce high-quality fries with full length of 2 cm satisfying sale specification after culture for 18-20 days. The method provided by the invention can solve the long-term shortage problem of spring early fries in culture of Tilapia aurea, and ensure all-year-round supply of fries to realize balanced production.

Description

technical field [0001] The invention relates to artificial propagation technology of fish, in particular to a perennial artificial propagation method of tilapia. Background technique [0002] Tilapia is the most industrialized breeding object in our province. In 2010, the output reached more than 500,000 tons, the export was 139,900 tons, and the foreign exchange earning was 449 million US dollars. Tilapia is also a hot-water fish. At present, the reproduction of tilapia at home and abroad is basically dependent on the weather, that is, it naturally spawns and catches seedlings in broodstock ponds without control facilities. Affected by natural conditions, especially the weather, the emergence season is late and the emergence time is concentrated, which cannot meet the needs of the tilapia industry for balanced product listing. Due to the obstacles in the traditional breeding technology, the production season of seedlings of the leading species that earns foreign exchange i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 叶卫陈辉崇梁德进符云黄维
Owner 广东省淡水名优鱼类种苗繁育中心
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