Artificial fertilization method for loaches

Abstract

The present invention discloses an artificial fertilization method for loaches. The method comprises 1) loach feeding: feeding the loaches in a separate feeding tank with well water, and keeping the temperature of the water at 20-25 DEG C; 2) oxytocin injection: injecting the oxytocin in 15 to 20 hours before induced spawning; 3) artificial spawning induction: in 20-25 DEG C well water, gently pressing a belly of a female loach until colorless and transparent eggs outflow, squeezing the eggs on a plate, taking a seminal vesicle of a male loach, rubbing the seminal vesicle with gauze moistened by liquid medicine, so that seminal fluid outflows into the plate for automatic fertilization, then inserting the fertilized eggs into a hatchery bed in a hatchery pond; and 4) hatching. According to the method disclosed by the present invention, by feeding the loaches in the separate feeding tank, replacing the water with well water in 3-5 days before fertilization of the loach, keeping the temperature of the water at 20-25 DEG C and injecting the oxytocin in 15 to 20 hours before induced spawning, an injury on loach broodstock can be avoided; an effect of an induced spawning method is good; the induction rate and the fertilization rate of the loach broodstock are improved, thereby improving the number of eggs and improving the hatching rate and the seedling rate.

Description

technical field [0001] The invention belongs to the technical field of cultivation of fish, mussels, crayfish, lobsters, sponges, pearls, etc., and in particular relates to a method for artificial fertilization of loach. Background technique [0002] Loach (Misgurnus anguillicaudatus) has high nutritional and medicinal value. It has a large demand in the domestic and foreign markets, and the price is relatively good. The artificial breeding has high profits and quick results, and the breeding prospect is promising. The breeding area of ​​loach in China is 15 million to 20 million square meters, mainly concentrated in Jiangsu, Henan, Hubei, Shandong, Anhui and Sichuan. The farming mode is mainly pond seine farming with soil, which is currently the main factor restricting the efficiency of loach farming The growth rate of loach is slow, and the annual growth rate is difficult to reach more than 3 times; parent loach breeding and intensive cultivation are one of the more import...

AI Technical Summary

Problems solved by technology

The breeding area of ​​loach in China is 15 million to 20 million square meters, mainly concentrated in Jiangsu, Henan, Hubei, Shandong, Anhui and Sichuan. The farming mode is mainly pond seine farming with soil, which is currently the main factor restricting the efficiency of loach farming The growth rate of loach is slow, and the annual growth rate is difficult to reach more than 3 times; parent loach breeding and intensive cultivation are one of the more important and key technical links in the artificial breeding of loach. Through selection and intensive cultivation, the physique of parent loach is enhanced , the amount of fecundity is large, and the fertilization rate of induced production is high. At present, the breeding and intensive cultivation technology of loach parents is not mature enough, and there is no standardized breeding method. , The number of eggs laid is small, the fertilization rate and hatching rate are very low, and the number of seedlings is not ideal