A method for improving the quality of rockfish seedlings

Abstract

The application discloses a breeding method for improving the quality of Sebastes schlegelii fry, and comprises the following steps: collecting parent fish in a Sebastes schlegelii original seed field, artificially cultivating the parent fish in a net cage at sea, and performing nutrition rejuvenation on the parent fish; obtaining offspring fry by using an artificial fry squeezing method; controlling reasonable culture density according to different fry specifications; screening and using natural plant active ingredients and common micro-ecological preparations which are easy to absorb; avoiding disinfection and drug use; and controlling water flow rate in different growth stages. The method integrates nutrition rejuvenation, artificial fry production, pollution-free water quality regulation and fry behavior state regulation, solves problems such as poor parent germplasm, dead fry or insufficient activity of fry, slow growth and poor stress resistance in the process of fry breeding, has strong controllability in the operation period, has high survival rate of fry, has remarkable growth promotion and immunity effect, has good prevention and treatment effect on bacterial diseases, realizes pollution-free fry breeding, can reduce disease occurrence and mortality, reduces the feed conversion ratio, and effectively improves the economic benefit of breeding.