Feed capable of improving reproductive capacity and increasing fertility rate of parent fishes of cynoglossus semilaevis

Abstract

The invention discloses a feed capable of improving the reproductive capacity and increasing the fertility rate of parent fishes of cynoglossus semilaevis, belonging to a preparation technology of a compound feed for marine fishes. The additive amount of euphausiacea meal in the feed is 10%. The feed for the parent fishes of cynoglossus semilaevis contains 62% of fish meal, 10% of euphausiacea meal, 5% of casein, 10% of high-gluten flour, 6% of fish oil, 1% of soybean oil, 2% of soybean lecithin, 1% of choline, 1.5% of monocalcium phosphate, 0.5% of vitamin C, 0.5% of mixed vitamin and 0.5% of mixed mineral substances according to a formula. Because 10% of the euphausiacea meal is added into the feed for the parent fishes of cynoglossus semilaevis, the reproductive capacity of the cynoglossus semilaevis can be improved, the content of serum estradiol can be increased, the fertility rate, hatchability and survival vital index are remarkably increased, and the malformation rate of larva fishes is reduced.

Description

technical field [0001] The invention belongs to the field of compound feed for seawater fish, in particular to a feed for improving the fecundity and fertilization rate of broodstock of half-smooth tongue sole. Background technique [0002] At present, the feed used in broodstock breeding in my country is mainly chilled miscellaneous fish or simply processed wet pellet feed. These feeds can neither fully meet the nutritional needs of broodstock, but also cause waste of resources and environmental pollution. The imbalance or lack of parent fish nutrition will cause dysgenesis of the brood fish gonads, and the quality of the gametes produced will be low, resulting in a decrease in the emergence rate and a decrease in the quality of the seedlings. Reasonable design of broodstock feed formula and supply of high-quality broodstock feed are crucial to the development of the aquaculture industry. Nutritional requirements of broodstock is a very weak link in fish nutrition research...

AI Technical Summary

Problems solved by technology

[0003] In recent years, the reproductive performance of broodstock in the process of artificial breeding of tongue sole is poor, and the quality of larvae and juveniles has become more and more serious, resulting in a shortage of seedlings of tongue sole, which seriously restricts the further development of its breeding industry

At present, the emergence rate of artificially raised seedlings of tongue sole in my country is generally not higher than 30%, and the shortage of high-quality seedlings is now the bottleneck of the development of this fish breeding industry.

There are two reasons for the poor reproductive performance of half-smooth tongue sole broodstock. On the one hand, there is a large difference between the male and female individuals of half-smooth tongue sole. , the research on the nutritional requirements of broodstock is almost blank, and there is no feed specifically for the nutritional requirements of broodstock of semi-smooth tongue sole

Images