Method for breeding gift tilapia fries with high male ratio through temperature induction

A temperature-induced technology for Gifu tilapia, applied in fish farming, application, climate change adaptation, etc., can solve the problems of changing good traits, difficult food safety, and low seedling production efficiency, so as to reduce seedlings and avoid competition. Paradoxical effects of water baiting

Inactive Publication Date: 2010-11-24
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The breeding efficiency of Gifu tilapia hybridized with other tilapias is low, the male rate is not high enough, and the hybridization has also changed the unique excellent traits of Gifu tilapia; the food safety of using hormones to induce male fish is not easy to be accepted by people, some The country bans the use of sex hormones

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0009] 1. Preparation of the cultivation pool. Two cement pools, both with an area of ​​13 square meters and a depth of 1 meter, are convenient for water injection and drainage. Second, the source of fry. According to the traditional breeding method, during the breeding season of tilapia on June 20, the fish fry caught from the fry breeding pond were sieved with a sieve for sifting the water flower fry, and 520,000 Jifu tilapia water flower fry were obtained. 3. Water injection and release of seedlings. Well water is used for water injection, and the water quality is fresh and pollution-free. First, shallow injection of 50 cm is put into the fry, and 20,000 fry are released per square meter. The water temperature difference is 3°C when the seedlings are released. 4. Temperature treatment and feeding management. 1. Temperature treatment. After the fry is put in, heat with a temperature controller (WK-2 temperature controller), control the temperature at 32° C., and cover th...

Embodiment approach 2

[0012] 1. Preparation of the cultivation pool. Use two cement pools, both of which have an area of ​​20 square meters and a depth of 1 meter, which is convenient for water injection. Second, the source of fry. In the second year, on July 2, 600,000 fish of the same batch of Gifu tilapia sprigs cultivated from industrialization were put into a constant temperature pool at 36°C for temperature cultivation. 3. Water injection and release of seedlings. Water injection uses aerated tap water. The water quality is fresh and pollution-free. First shallow injection of 50 cm is put into the fry, and 30,000 fry are put in per square meter. The water temperature difference is 5°C when putting the seedlings. 4. Temperature treatment and feeding management. 1. Temperature treatment. After the fry are put in, heat with a temperature controller (WK-2 temperature controller), control the temperature at 36° C., and cover the cement pool with a film to keep warm. The depth of water filling...

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Abstract

The invention belongs to the aquatic animal sex control technology and in particular relates to a breeding method capable of improving the male ratio of gift tilapia fries. The male tilapia grows faster than the female tilapia by 30-50% under the same conditions; therefore the male ratio is improved as much as possible when tilapia is bred. To improve the male ratio of the reproduced gift tilapia and give play to the breeding advantage of the gift tilapia with high male ratio, the invention provides an artificial fry breeding method for improving the male ratio of the reproduced gift tilapia through water temperature control, comprising the following steps: 1. breeding pool preparation; 2. fry source; 3. water injection and fry putting; and 4. temperature control and raising management. The method not only can substantially improve the male ratio, but also does not produce any toxic or side effect, is simple and practical, ensures the male ratio of the bred fries to be over 90% and is suitable for ordinary gift tilapia fry breeding farms.

Description

technical field [0001] The invention belongs to the gender control technology of aquaculture, and specifically relates to a breeding method capable of increasing the male ratio of Gifu tilapia fry. Background technique [0002] There is a difference in growth rate between male and female individuals of many fish, and this kind of single-sex culture is often used in aquaculture to increase production. The male of tilapia grows faster than the female, 30%-50% faster under the same conditions, so try to increase the male rate when raising tilapia. The methods to increase the male rate of tilapia include: 1. Increase the male rate through hybridization between species, for example, the male rate of Oni hybrid tilapia (Olia tilapia♂×Nile tilapia♀) can reach 90% Above; 2. Feeding feed containing sex hormones at a certain stage of seedlings can also increase the percentage of males or females. At present, the new breed of Jifu tilapia is a new strain bred from Nile tilapia after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 徐跑何杰
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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