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Artificial seed production and seedling method of tilapia

A tilapia and artificial technology is applied in the field of artificial seed production and breeding of tilapia, which can solve the problems of insufficient system and comprehensiveness, and achieve the effects of simple facilities, low investment and easy technology.

Inactive Publication Date: 2010-07-07
MAOMING MAONAN SANGAO FISHERY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technologies are targeted to solve some problems in tilapia seed production and breeding, which are not systematic and comprehensive enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Breeding and breeding of broodstock

[0026] The parent fishes are tilapias over 1 year old, and they have been selected for 3 times before use. When the juveniles reach 50-100g, the Oria tilapia and the Nile tilapia are selected and raised separately; when the body weight When it reaches 250-300g, select the ones with bright tail lines, neat tail bands, long bodies and no deformities, and the mouth of the female fish should be flat and not warped, and 20% of the male and female tilapias should be eliminated; the third time is carried out before overwintering. Breeding, eliminate some smaller size, each accounting for 20% of the male and female tilapia, the ratio of female and male broodstock is 2:1.

[0027] Broodstock breeding pond area is 20m 2 / piece, square, before stocking broodstock, dry the pool water and expose to the sun for 6 days, use quicklime 200g / m 3 After adding water to the slurry, the whole pond is sprayed and disinfected, and after 2 days, new w...

Embodiment 2

[0035] Concrete operation is the same as embodiment one, broodstock breeding is through 2 selection breedings, once juvenile fish reaches 50~100g, the second time is before overwintering, and the ratio of female and male broodstock is 2: 1.5, and the water temperature of broodstock cultivation pond is 29 ℃, The salinity is 10‰, the pH is 8.3, the light intensity is 100lux, and new water is added once a day. The water temperature of the oxytocin pool is 30°C, the salinity is 10‰, and the dissolved oxygen in the water is 3.5mg / L. The water temperature of the hatching tank is controlled at about 30°C, the salinity is 8‰, and the pH is 8.3, and the hatching takes 60 to 70 hours. The water temperature difference between the nursery pond and the receiving pond shall not exceed ±1°C, and the salinity difference shall not exceed ±3‰. Slowly put the fry into the pond, and the frying density is 50,000 fish / m 3 , 3-4 days after the seedlings start to eat, feed a small amount of rotifer...

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Abstract

Disclosed is an artificial seed production and seedling method of tilapia, the method comprises the steps of parent fish breeding and cultivation, induced spawning and ova picking, artificial incubation, seedling cultivation process. The parent fish breeding is at lease implemented twice, when young fish is cultured to reach the weight of 50 to 100 g and before overwintering, the female and male parent fish is chosen by the proportion of 2:1 to 1.5, and respectively put into a cultivation e pond to culture according to different genders. Mature tilapia parent fish is put into an induced spawning pond, and the natural estrus and spawning of the parent fish are promoted by utilizing the ecological simulation method, fertilized eggs are taken out from oral cavity of the female fish and removed to a hatching slot to hatch, then the fertilized eggs are impacted by micro water current to roll and hatch completely in the hatching slot, after newly-hatched larva is flowed into a receiving pond and is screened by genders, the newly-hatched larva is sent into a breeding pond to culture. The method is scientific and reasonable, the technology is easy to be controlled, the investment is low, the facilities are simple, the method is easy to be implemented, the artificial breeding of tilapia is realized. The method has the advantages that the breeding time is short, the fish fry quality is good, the survival rate is high and the like, the method is applicable to large-scale breeding production, and has the good economic benefit.

Description

technical field [0001] The invention relates to a method for fish seed production and seedling raising in aquaculture industry, in particular to a method for artificial seed production and seedling raising of tilapia. Background technique [0002] Tilapia belongs to the cichlid family of Perciformes and belongs to tropical fish. There are more than 100 species in total, most of which are native to the African continent and the Middle East. Tilapia has the characteristics of fast growth, wide feeding habits, strong fecundity, less disease, good meat quality, high yield, etc. Currently, the breeding area has reached more than 70 countries and regions. my country began to introduce breeding in the 1960s, and it has become an important There are more than 10 species of fish cultured, including: Oni tilapia, Gifu tilapia, and Gior tilapia. Oni tilapia is the hybrid offspring of Oria tilapia and Nile tilapia, and is currently the main species of tilapia cultured in my country. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 李瑞伟宋文东王辉李太光刘宗成黄翔鹄陈德寿林海生陶震纪丽丽颜建斌王浩郭先霞胡世伟李世杰秦培文梁华盛黄华明
Owner MAOMING MAONAN SANGAO FISHERY DEV
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