A kind of rapid turbot family seed breeding method

Abstract

The invention provides a method for quickly breeding turbot genealogical fingerlings so as to solve the technical problem that the breeding period of the existing turbot genealogical fingerlings is long. The method disclosed by the invention comprises the following steps: during a period that a turbot larva produces a swimming bladder during the development of the turbot larva, the rotifer feeding density is increased in advance when the turbot larva is bred for 6-8 days, the rotifer feeding density is properly reduced when the turbot larva is bred for 9-11 days, and the temperature is maintained steady, so that the situation that the turbot larva produces the swimming bladder smoothly and quickly can be facilitated, the survival rate is increased, and the time that the turbot larva produces the swimming bladder is shortened; the artemia feeding density is properly increased when the turbot larva is bred for 18-22 days, converting the situation that two eyes of a juvenile turbot are distributed on the two sides of a head into the situation that the two eyes of the juvenile turbot are distributed on the same side of the head can be accelerated, the survival rate is increased, and the time that converting the situation that the two eyes of the juvenile turbot are distributed on the two sides of the head into the situation that the two eyes of the juvenile turbot are distributed on the same side of the head is shortened; the artemia feeding time is prolonged when the turbot larva is bred for 30-45 days, and artificial mixed feed is combined with artemia, so that the development time from a juvenile turbot stage to an adolescent turbot stage can be shortened, and the later-stage growth of fries is accelerated; the breeding water temperature is properly raised to 18.5 DEG C-19.5 DEG C when the turbot larva is bred for 60-90 days, which is favorable for the growth of juvenile turbots, when the turbot larva is bred for 60-75 days, the juvenile turbots can grow to commercial fries of 5-6 cm, and when the turbot larva is bred for 80-90 days, the juvenile turbots can grow to large fries of 7-8 cm, so that the whole breeding period of the turbot fingerlings is shortened.

Description

technical field [0001] The invention belongs to the technical field of seawater breeding animal breeding, and specifically relates to a fast turbot family seedling breeding method. Background technique [0002] Turbot (Scophthalmus maximus L.) is a bottom-dwelling marine fish native to Europe. It has the advantages of delicious taste, rapid growth, low temperature resistance, and easy domestication. It is one of the excellent marine cultured species in Europe and other places. Turbot was introduced into my country in 1992, and its breeding scale has developed rapidly since it broke through the productive nursery technology in 1999. It has become an important fish breeding species in the northern coast of my country, with an annual economic value of up to 3 billion yuan. Over the past ten years, due to the neglect of the research on the breeding of improved varieties, the phenomenon of germplasm decline in the industry has become more and more serious, mainly manifested in th...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a fast method for cultivating turbot family seedlings, so as to solve the problem that the current turbot family seedling cultivation period is long