A kind of factory-like full-artificial propagation method of flat scorpionfish

Abstract

The invention provides an industrialized full-artificial propagation method of Pleurotus xushii; 1) selection and cultivation of industrial broodstock; 2) artificial insemination; 3) cultivation of broodstock after insemination; 4) distribution of broodstock in ponds and calving; 5) Seed rearing. The present invention establishes an industrialized full-artificial propagation method for the Xu's flat scorpionfish, so that the success rate of broodstock insemination reaches more than 88.5%, the litter survival rate reaches more than 78.6%, and the seedling survival rate reaches more than 48.0%. After 2.5 Monthly cultivation can obtain high-quality seedlings with an average length of 5.2cm, which has effectively improved the reproductive efficiency of the female broodstock of the flat scorpionfish, broken through the large-scale mass production of its high-quality seedlings, and solved the problem of directly fishing for broodstock with larvae on wild resources. Relying on the broodstock group in cage culture, it solves the problems of low mating rate and low litter survival rate in industrialization, and has high promotion value.

Description

technical field [0001] The invention belongs to the technical field of seawater fish breeding; in particular, it relates to an industrialized full-artificial breeding method for flat scorpionfish. Background technique [0002] Xu's flat scorpionfish, Sebastes schlegelii (Hilgendorf, 1880), also known as Black Rockfish, Black Rockfish in English, is a kind of offshore cold-temperate demersal reef-loving fish belonging to the family Scorpionidae of the order Scorpionidae. Abroad, it is mainly distributed in the east and west coasts of North Korea, the south of Hokkaido in Japan, and the southern waters of the Sea of ​​Okhotsk. Domestically, it is mainly distributed in the Bohai Sea, Yellow Sea and East China Sea. Its meat is tender, delicious, rich in protein and low in fat. It enjoys the reputation of "black grouper" in the north and is very popular among consumers. Because of its strong disease resistance, low temperature resistance, rough food and fast growth, etc. It has ...

AI Technical Summary

Problems solved by technology

[0004] At present, in some northern areas, there is still the phenomenon of directly fishing for wild seedlings to obtain seedlings of flat scorpionfish. The seedlings are dependent on the weather, the supply of seedlings is unstable, the domestication of compound feed is difficult, and the survival rate of seedlings is low. The quantity, quality and survival rate of seedlings are difficult to meet the needs of the breeding industry, and there are serious damage to natural resources and ecological balance.

In recent years, with the breakthrough and development of Xu's flat scorpion seedling breeding technology, and the recognition of artificial seedlings by breeding enterprises, the main way to obtain seedlings is to directly catch wild or netted scorpionfish during the April-May breeding season of Xu's flat scorpionfish. The broodstock of the broodstock cultured in the box is artificially propagated indoors, and this breeding method also has the following problems: 1) the source of the broodstock: the source is relatively unstable. The age and size of sexual maturity cannot meet the needs of reproduction, and if the time for broodstock to reach the breeding and calving stage is not well grasped, it is very easy to cause the broodstock to discharge the larvae directly into the sea and cause losses; on the other hand, if the mating season is around November, the net Huge changes in temperature, wind and waves, etc. in the box culture sea area will lead to low natural mating rate of male and female broodstock, which will directly affect the acquisition of broodstock in the coming year

2) Transportation problem: The broodstock of Huaizi will go through repeated changes in temperature and water quality from the breeding sea area to the nursery workshop. At the same time, there are sharp spines on the back, pelvic fin, and gill cover of the flat scorpionfish, and the broodstock are easy to interact with each other during transportation Stab wounds can easily cause broodstock stress abortion, high mortality rate of larvae, low emergence rate, high deformity rate, high cost, etc.

3) The problem of low reuse rate of broodstock after birth: According to the survey, the mortality rate of broodstock after delivery stress is over 70%, and the reuse rate of broodstock is low, causing unnecessary losses

[0005] At present, the artificial propagation of the flat scorpion chrysalis at home and abroad has not yet made a substantial breakthrough, and it is impossible to obtain highly stable female broodstock through artificial control, nor can it break through the large-scale mass production of high-quality seedlings of the flat scorpion chrysalis. Therefore, the present invention establishes Xu's flat scorpionfish's factory artificial breeding method provides a new method for the next step of rapid seed propagation, improved seed selection and healthy development of the cage culture industry