Rapid propagation method for mud fish

Abstract

The invention discloses a rapid propagation method for mud fish. The method comprises the following steps of (1) selecting the mud fish which are two to three-winter-old, 15 to 20cm in body length and 30 to 50 grams in body weight as propagation parents, and ensuring that the female / male ratio of the parent mud fish is 1:2-1:3; (2) taking the parent mud fish out of a culture pond, putting the parent mud fish on a spawning induction bed, and injecting 800 to 1,000 international units of chorionic gonadotropin to each parent female mud fish and 400 to 500 international units of chorionic gonadotropin to each parent male mud fish by adopting an intramuscular injection method; (3) putting the parent mud fish subjected to spawning induction into an incubation jar for spawning, taking the parent mud fish in a net of the incubation jar out after 20 hours of spawning, ensuring that eggs are independently incubated in the incubation jar, continuously injecting new clear water in the incubation process to ensure that water in the incubation jar flows; (4) after incubating for 1 month, making sure that fries of the mud fish in the length of 2.5-3.6cm are formed. According to the method, the propagation time of the mud fish is greatly shortened, the hatching rate is improved, the manpower is reduced, and the aquaculture economic benefit is improved.

Description

technical field [0001] The invention relates to the field of breeding technology, in particular to a method for rapid breeding of loach. Background technique [0002] Loach is known as "ginseng in water" for its delicious taste, tender meat and rich nutrition. According to analysis, every 100 grams of loach meat contains 18.4 grams of protein, 2.9 grams of fat, and the content of vitamin B1, A, and C is higher than that of other fish. In addition, loach is mild in nature, sweet in taste, and enters the liver, spleen and kidney. It also has high medical value. Therefore, in recent years, the export trade volume of loach has increased year by year, and the consumption of loach in China has also shown an upward trend. Since the natural loach resources are far from meeting people's consumption needs, the loach breeding industry has also begun to enter a period of rapid development. [0003] The existing loach hatching breeding method is: the loach broodstock is placed in the p...

AI Technical Summary

Problems solved by technology

Yet existing method is when laying eggs, because the accumulation of ovum, causes the seedling rate of hatching to be low, and the survival rate of loach nursery is low at the opening stage of larvae.