Improved breeding method for grass carps

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

technical field [0001] The invention relates to an improved breeding method of grass carp. Background technique [0002] With the development of society and the improvement of living standards, people pay more and more attention to the food they eat; fish is more and more popular because it does not contain fat and has high nutritional value. Among them, grass carp is a kind that is often eaten. Grass carp is rich in unsaturated fatty acids, which is good for blood circulation and is a good food for cardiovascular patients; grass carp is rich in selenium, and regular consumption has anti-aging and beauty effects. It also has a certain preventive effect; for people who are thin and have poor appetite, grass carp meat is tender but not greasy, which can appetize and nourish. However, if grass carp reproduces under natural conditions, the reproductive capacity will decrease, and the disease resistance will gradually weaken, and it will also be unfavorable for large-scale farmi...

AI Technical Summary

Problems solved by technology

However, if grass carp reproduces under natural conditions, the reproductive capacity will decrease, and the disease resistance will gradually weaken, and it will also be unfavorable for large-scale farming of grass carp.