Indoor intensive artificial breeding technique of Yangtze River Coilia ectenes

Abstract

The invention relates to an indoor intensive artificial breeding technique of Yangtze River Coilia ectenes, which comprises the steps of Coilia ectenes parent fish enhanced breeding, artificial spawning induction, artificial hatching and fingerling breeding. The indoor intensive artificial breeding technique of Yangtze River Coilia ectenes is characterized in that Coilia ectenes adult fish which is alternately cultured for three years by using seawater and freshwater is used as parent fish for the Coilia ectenes parent fish enhanced breeding, female parent fish individuals with clearly visible ovary outlines and softer inferior bellies and male parent fish individuals with milk white semen which flows out when the bellies are slightly pressed are selected for the artificial spawning induction, the female-male ratio is 1:3, the female parent fish and the male parent fish naturally mate for laying eggs and fertilization, temperature-controlled inflated hatching in still water is conducted to fertilized eggs, and the fingerling breeding comprises culture at four stages, wherein the culture at the first stage comprises the steps of temporarily culturing newly hatched fries from the time that fries are newly hatched to the time that the fries open mouths, the culture at the second stage comprises the step of culturing the fingerlings from body length being 3mm to body length being 20mm, the culture at the third stage comprises the step of culturing the fingerlings from body length being 20mm to body length being 30mm, the culture at the fourth stage comprises the step of culturing the fingerlings from body length being 30mm to body length being 40-50mm, and the fingerlings can be put in a pond for conventional culture after the body length of the fingerlings reaches 40-50mm.

Description

Technical field [0001] The invention relates to an artificial propagation technology of migratory fishes, in particular to an intensive artificial breeding technology of the Yangtze Coilia spp. Background technique [0002] Coilia ectenes (Coilia ectenes) belongs to the genus Herringoides, Anchovy and Coilia, commonly known as saury, saury, hairy saury, beard fish, coilia, etc. It is mainly distributed in the Yellow Sea and the East my country Sea. It can be seen in all the rivers that open to the sea, such as the Liao River, Haihe River, Yellow River, Yangtze River and Qiantang River. It is known for its tender meat and delicious taste. It is one of the "Three Fresh Yangtze Rivers". The precious migratory fish. In recent years, due to the influence of many factors such as overfishing and the deterioration of the ecological environment, the Coilia spp. resources have declined sharply, but the market demand has increased unabated, and even reached the dilemma of pricelessness. Bef...

AI Technical Summary

Problems solved by technology

Although some research institutions and production units in China have been seeking a method similar to the four major family carps by capturing mature wild female and male broodstock for artificial insemination, they have repeatedly failed and there is no successful case.

There are also some units that have carried out breeding experiments such as the cultivation of seedlings in the Guanjiang River and the netting of seedlings caught along the Yangtze River. There are occasional individual reports of the success of artificial breeding of the sword anchovy. There are still many technical parameters that are relatively vague, and seed cultivation is even more accidental. Most of them use open-mouthed fish to be stocked in ponds once. The survival rate of seed cultivation is low, and industrialization cannot be promoted.