Production method for summer offspring of Songjiang blue pickerel

Abstract

A method for culturing the minnow of roughskin sculpin includes such steps as capturing the parent fish in near sea in early spring, temporarily culturing in indoor pool, using flowing water to stimulate the parents for estrus, natural mating, ovipositing, collecting fertilized ova, natural incubating in natural seawater in pool, regulating illuminance for correcting the strong phototaxis, applying nutritive forage, improving water quality, and post culturing.

Description

technical field [0001] The invention relates to a production method of fish fry, in particular to a production method of Songjiang perch summer flower fry. Background technique [0002] Songjiang perch (Trachidermis fasciatus) is known as "the first fish in the south of the Yangtze River". It has high economic value and is closely related to my country's traditional history and culture. It was incorporated into Li Shizhen's "Compendium of Materia Medica" and has medicinal value. Songjiang perch is a species of fish that reproduces in the sea. It was originally widely distributed in the coastal areas from Dandong in the north to Xiamen in the south. It is endangered due to the construction of water conservancy facilities and the pollution of the water environment. At present, the Songjiang perch in my country only remains in the Bohai Bay. Chinese patent CN 119460930 discloses the breeding technology of Songjiang perch by Fudan University. Specifically, the back-up brood fis...

AI Technical Summary

Problems solved by technology

This technology only realizes the factory breeding and seed production of Songjiang perch, but there are many deficiencies in the breeding technology and seed production technology, making it difficult to popularize

The main defect that this technology exists is: 1, because the population of Songjiang perch is very little at present, it is difficult to catch the backup broodstock that is descending into the sea and migrating in rivers, and obtaining a breeding colony of a certain scale requires considerable manpower and material resources; The reserved broodstock are put into the industrial workshop for 2-5 months, and then artificially ripened, the process is complex; the use of expensive equipment such as ozone generators, ultraviolet sterilizers, and protein separators requires huge investment and high costs

2. Reserve broodstock and broodstock are stressed and infected with drugs, and drugs are used to induce ripening and labor, causing a certain degree of damage to natural resources, which does not meet the safety production and environmental protection requirements advocated by fishery production

3. Songjiang perch has not yet reached the developmental stage where it can enter freshwater life after being cultivated to the water flower stage

Fudan University's "Songjiang perch water flower seed production technology" is only a stage technical achievement, and has not yet reached a mature technology that can be practically promoted