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Loach fry artificial breeding method

A technology of artificial breeding and fry, applied in fish farming, application, climate change adaptation, etc., can solve the problems of low natural spawning yield, difficult operation, small scale, etc., to improve hatching rate, survival rate, management convenient effect

Inactive Publication Date: 2011-10-19
HUAIHAI INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield of natural spawning is low, the eggs produced are easy to be eaten by loach, and the collection of fertilized eggs is inconvenient, so it is impossible to provide loach fry in batches in time
The artificial reproduction method currently used has defects in collecting eggs and sperm, and the operation is difficult, and the loss of spawning broodstock is large; Problems such as artificial breeding of juvenile fish have not been well resolved, and it is difficult to form a mature technical system. As a result, the current artificial breeding of loach has low seedling emergence efficiency and small scale, and cannot form a stable factory production of loach seedlings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. A kind of artificial breeding method of loach fry, its steps are as follows:

[0020] (1) select healthy brood loach more than 2 winter ages, carry out intensive cultivation 25 days by the following method: separate male and female brood loach and carry out intensive cultivation in the special pond, the feed that adopts when strengthening cultivation is soybean meal, or for For loach feed with a protein content greater than 50%, add yeast powder and vitamins in an appropriate amount, and the daily feeding amount is 5% of the parent loach's body weight;

[0021] (2) Artificial oxytocin: the oxytocin drug is mixed with chorionic gonadotropin HCG and dioconone maleate DOM, and the injection dose of female loach HCG is 15IU / g, and the injection dose of DOM is 0.003mg / g; the injection of male loach The dose is 40% of the injection dose of female loach; and the injection dose of each parent loach is not more than 0.5 ml; the ratio of female loach to male loach is ...

Embodiment 2

[0025] Example 2. A kind of artificial breeding method of loach fry, its steps are as follows:

[0026] (1) select healthy parent loach more than 2 winter ages, carry out intensive cultivation 35 days by the following method: separate male and female parent loach and carry out intensive cultivation in a special pond, the feed adopted during intensive cultivation is soybean meal, or For loach feed with a protein content greater than 50%, add yeast powder and vitamins in an appropriate amount, and the daily feeding amount is 7% of the parent loach's body weight;

[0027] (2) Artificial oxytocin: the oxytocin drug is mixed with chorionic gonadotropin HCG and dioconone maleate DOM, and the injection dose of female loach HCG is 20IU / g, and the injection dose of DOM is 0.005mg / g; the injection of male loach The dose is 60% of the injection dose of female loach; and the injection dose of each parent loach is not more than 0.5 ml; the ratio of female loach to male loach is 1:3;

[0...

Embodiment 3

[0031] Example 3. A kind of artificial breeding method of loach fry, its steps are as follows:

[0032] (1) select healthy brood loach more than 2 winter ages, carry out intensive cultivation 30 days by the following method: separate male and female brood loach and carry out intensive cultivation in the special pond, the feed that adopts when strengthening cultivation is soybean meal, or for For loach feed with a protein content greater than 50%, add yeast powder and vitamins in an appropriate amount, and the daily feeding amount is 6% of the parent loach's body weight;

[0033] (2) Artificial oxytocin: the oxytocin drug is mixed with chorionic gonadotropin HCG and dioconone maleate DOM, and the injection dose of female loach HCG is 18IU / g, and the injection dose of DOM is 0.004mg / g; the injection of male loach The dose is 50% of the injection dose of female loach; and the injection dose of each parent loach is not more than 0.5 ml; the ratio of female loach to male loach is ...

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Abstract

The invention relates to a loach fry artificial breeding method which is characterized by including the steps of selecting healthy parental loaches above two winters old and conducting enrichment culture for 25-35 days; then conducting hybrid injection of HCG (human chorionic gonadotropin) and DOM (domperidone) for artificially hastening parturition; after 10-14 hours after parturition hastening, collecting fertilized eggs; and then conducting artificial incubation and larva breeding, thus obtaining the loach fry. In the invention, through the enrichment culture of the parental loaches, synchronous maturing is promoted and oogonium percentage is enhanced; with the parental loach parturition hastening technology, synchronous egg laying can be realized; with the hybrid injection method, the ovarian development and the egg laying effect of the loaches can be promoted, so that the synchronous egg laying rate of the parental loaches achieves 40%; and an inflation incubation way is adopted on the fertilized eggs, so that the incubation rate of the fertilized eggs can be greatly improved. Through enrichment culture, the survival rate of the loach fry can be enhanced remarkably.

Description

technical field [0001] The invention relates to an artificial breeding method for animals, in particular to an artificial breeding method for loach fry. Background technique [0002] At present, the seed of loach culture in my country mainly depends on the natural seed of fishing. Due to severe pollution from chemical fertilizers, pesticides, and industrial wastes, as well as overfishing, the wild resources of loach have declined sharply. The seed resources provided by wild loach can no longer meet the needs of large-scale farming. This also makes the supply of loach seedlings a "bottleneck" restricting the rapid development of loach farming in my country, and has caused huge damage to its wild resources. [0003] Loach can not only lay eggs naturally, but also adopt artificial breeding. The natural spawning yield is low, and the ovum produced is easily eaten by loach, and the collection of fertilized eggs is also inconvenient, and loach fry cannot be provided in batches 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 姚东瑞朱明许建和丁成曙韩重举
Owner HUAIHAI INST OF TECH
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