CN104206328A - Improved breeding method for grass carps - Google Patents

Abstract

The invention discloses an improved breeding method for grass carps. The method comprises the following operating steps: putting Cabomba caroliniana in a fish pond, and partitioning the fish pond into a plurality of units with plastic meshes, wherein the depth of water is 30-45cm, the temperature of the water is 8-11 DEG C, and the water in the fish pond is flowing circulating water; selecting Guangxi herrings with the weight of 3,500-4,000g as male parents, selecting local grass carps with the weight of 7,500-9,000g as female parents, and putting a female parent grass carp and a male parent herring into each unit of the fish pond 25 days before the ovulation of the grass carps; when the condition that eggs are discharged from the pudenda of the grass carps is discovered during breeding, adopting manual-squeeze ovulation (the eggs discharged at the beginning are white), and immediately stopping squeeze ovulation when the condition that the eggs discharged through squeezing become pale-green. By adopting the method, the ovulation amount of the grass carps is increased by 20-30%, and after fish fries hatched from the eggs grow up, the space of abdominal cavity becomes smaller, the flesh is tender, the flavor is delicious, the flesh is partial to that of the herrings, the body type is partial to that of the grass carps, the disease resistance is strong, and the culturing is easy.

Description

The improvement propagation method of a kind of grass carp

Technical field

The present invention relates to the improvement propagation method of a kind of grass carp.

Background technology

Along with social development, growth in the living standard, people more and more focus on the food of picked-up; Fish are due to fatty, and have higher nutritive value, are more and more liked.Wherein grass carp is often eat a kind of, and grass carp contains abundant unsaturated fatty acid, favourable to blood circulation, is the good food of cardiovascular patient; Grass carp contains abundant selenium element, and often edible have effect anti-ageing, beauty treatment, and tumour is also had to certain preventive and therapeutic effect; For the people of gynecological ailments, poor appetite, grass carp meat is tender and oiliness, can whet the appetite, nourish.Yet grass carp breeds under field conditions (factors), breeding amount can reduce, and resistance against diseases weakens gradually, also can be unfavorable for the breeding scale of grass carp simultaneously.

Summary of the invention

For the deficiencies in the prior art part, the present invention aims to provide the improvement propagation method of a kind of grass carp, guarantees to improve the breeding amount of grass carp, improves the resistance against diseases of grass carp.

The technical solution used in the present invention is as follows:

The improvement propagation method of this kind of grass carp, comprises following operating procedure:

(1) select fish pond, place water shield in fish pond, 30-45 centimetres of the depth of waters, are divided into a plurality of unit by fish pond with plastic wire, and the area of each unit is 4-6 square metres, 8-11 ℃ of water temperatures, and the water in fish pond is mobile cycle water;

(2) male parent is selected Guangxi black carp, and female parent is selected local grass carp, and male parent Guangxi black carp weight is 3500 grams-4000 grams, and maternal local grass carp weight is 7500 grams-9000 grams;

(3) at Spawning of The Grass Carp, ctenopharyngodon Idellus first 25 days, a maternal grass carp and a male parent black carp are put into respectively to unit, above-mentioned fish pond;

(4) feed of throwing between breeding period is maize alcohol stillage, and every day is thrown in 500-600 grams of vinasse in each unit;

(5) private parts of finding grass carp between breeding period has ovum to discharge, and adopts manual compression ovulation, and the ovum that starts to discharge is white, when finding that ovum that extruding is discharged is light green color, stops immediately extruding ovulation.

Adopt said method, grass carp ovulation amount increases by 20-30% than spontaneous ovulation, and after the fry of this ovum hatching grows up, abdominal space diminishes, fine and tender taste, and delicious, meat deflection black carp, build deflection grass carp, premunition is strong, easily cultivation.

Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating below, or can be instructed from the practice of the present invention.

Embodiment

Below will be described in detail the preferred embodiments of the present invention.Should be appreciated that preferred embodiment is only for the present invention is described, rather than in order to limit the scope of the invention.

The present embodiment adopts following steps:

(1) select fish pond, the place, fish pond of selecting in the present embodiment is positioned at Jiu Zhou town, Huangping County, in fish pond, place water shield, 30-45 centimetres of the depth of waters, fish pond is divided into a plurality of unit with plastic wire, the area of each unit is 4-6 square metres, 8-11 ℃ of water temperatures, and the water in fish pond is mobile cycle water;

(2) male parent is selected Guangxi black carp, and female parent is selected local grass carp, and male parent Guangxi black carp weight is 3500 grams-4000 grams, and maternal local grass carp weight is 7500 grams-9000 grams;

(3) at Spawning of The Grass Carp, ctenopharyngodon Idellus first 25 days, a maternal grass carp and a male parent black carp are put into respectively to unit, above-mentioned fish pond;

(4) feed of throwing between breeding period is maize alcohol stillage, and every day is thrown in 500-600 grams of vinasse in each unit;

(5) private parts of finding grass carp between breeding period has ovum to discharge, and adopts manual compression ovulation, and the ovum that starts to discharge is white, when finding that ovum that extruding is discharged is light green color, stops immediately extruding ovulation.

Adopt said method, grass carp ovulation amount increases by 20-30% than spontaneous ovulation, and after the fry of this ovum hatching grows up, abdominal space diminishes, fine and tender taste, and delicious, meat deflection black carp, build deflection grass carp, premunition is strong, easily cultivation.

Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of claim scope of the present invention.

Claims (1)

1. an improvement propagation method for grass carp, is characterized in that: comprise following operating procedure:

(1) select fish pond, place water shield in fish pond, 30-45 centimetres of the depth of waters, are divided into a plurality of unit by fish pond with plastic wire, and the area of each unit is 4-6 square metres, 8-11 ℃ of water temperatures, and the water in fish pond is mobile cycle water;

(2) male parent is selected Guangxi black carp, and female parent is selected local grass carp, and male parent Guangxi black carp weight is 3500 grams-4000 grams, and maternal local grass carp weight is 7500 grams-9000 grams;

(3) at Spawning of The Grass Carp, ctenopharyngodon Idellus first 25 days, a maternal grass carp and a male parent black carp are put into respectively to unit, above-mentioned fish pond;

(4) feed of throwing between breeding period is maize alcohol stillage, and every day is thrown in 500-600 grams of vinasse in each unit;

(5) private parts of finding grass carp between breeding period has ovum to discharge, and adopts manual compression ovulation, and the ovum that starts to discharge is white, when finding that ovum that extruding is discharged is light green color, stops immediately extruding ovulation.