Artificial control method for inducing synchronous maturing of gonads of male paralichthys dentatus parent and female paralichthys olivaceus parent

Abstract

The invention belongs to the field of aquaculture, and particularly relates to an artificial control method for inducing the synchronous maturing of the gonads of male paralichthys dentatus parent and female paralichthys olivaceus parent. In the method, the male paralichthys dentatus parent is subjected to full-illumination environmental control in autumn and winter to suppress the gonad development of the male paralichthys dentatus parent; and in the spring of the next year, the full-illumination environment is changed into short-illumination environment, and the male paralichthys dentatus parent and the female paralichthys olivaceus parent are subjected to gonad development control at the same time to realize the gonad maturing of the male paralichthys dentatus parent. The method provided by the invention can obtain mature sperms and ova at the same time, prolongs the germ production period of the male paralichthys dentatus parent, increases the sperm quantity, and lays a technological base for obtaining batch high-quality sperms and ova in the large-scale offspring seed production of hybrid flounder.

Description

technical field [0001] The invention belongs to the field of aquaculture, and specifically relates to an artificial cultivation and induction method for prolonging the sperm production period of male broodstock through artificial regulation of environmental factors and induction of hormones, so that two kinds of fish can reach gonad maturity in the same season. Background technique [0002] Summer flounder (Paralichthys dentatus) is called Summer flounder in English, also known as canine-toothed flounder, Atlantic flounder, and giant-toothed flounder. Distributed along the Atlantic coast of North America, from Maine to Florida. The suitable temperature range is 5-30°C, the suitable salt range is 5-35‰, the pH range is 6.0-8.2, and the dissolved oxygen range is 4-12mg / L. The age of sexual maturity of summer flounder is more than 2.5 years. The breeding period is autumn and winter when the water temperature drops. From north to south, there are breeding individuals in the Atl...

AI Technical Summary

Problems solved by technology

Hybrid offspring with normal development can be obtained by crossing male flounder and female flounder, and their breeding traits are significantly better than those of their parents; however, hybrid offspring obtained by crossing female flounder and male flounder have chromosome deletions and cannot develop normally