Artificial propagation method for yellowfin groupers

Abstract

The invention provides an artificial propagation method for yellowfin groupers. The artificial propagation method comprises the steps that (1) parents are selected; (2) a parent breeding pond is separated into a deep water area and a shallow water area with water flow communicated, wherein the water depth of the deep water area ranges from 4 m to 5.5 m, and the water depth of the shallow water area ranges from 3 m to 3.5 m; (3) parent fish breeding management is carried out, wherein a, in first 3 weeks during breeding, LED green light and yellow light alternately irradiate the water surface ofthe pond, and after the parent fishes are bred for 3 weeks or longer, the water surface of the pond is irradiated by the LED green light; b, feed is prepared from 3-5 parts of grouper compound feed and 1-2 parts of small fish and shrimp and artificial pellet feed, the parent fishes are fed with the first feed in the first 3 weeks during breeding, and the parent fishes are fed with the second feedafter being bred for 3 weeks or longer; c, the water temperature of the pond ranges from 21 DEG C to 26 DEG C, and water dissolved oxygen is larger than 4.8 mg/L; (4) breeding is enhanced before propagation is carried out; (5) artificial propagation is carried out; (6) zygotes are collected and hatched. According to the artificial propagation method for the yellowfin groupers, the adaptive capacity to environment of the parent fishes is enhanced, the activities of fish shoals are effectively promoted, the feeding rate is effectively increased, the fertility is high, and large-scale artificialbreeding of the yellowfin groupers can be effectively achieved.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to an artificial propagation method of yellowfin grouper. Background technique [0002] Yellowfin grouper, (Epinephelus flavocaeruleus) is a species of the genus Grouper. It belongs to reef fish, generally living at 10-150 meters, mainly distributed in Indian Ocean and West Indian Ocean, juveniles inhabit shallow water reefs, adults inhabit deeper reefs. The head and body are dark blue-purple to blue-gray, partly covered with blue-gray spots; the fins and jaws are bright yellow; part of the caudal fin angle, dorsal fin rays, anal fin and the top of the pelvic fin are slightly black. The yellow color of the fins and jaws gradually fades with age, and larger adults are dark gray, dark blue, purple, chestnut or black. Yellowfin grouper is a high-quality edible fish with low fat and high protein. With the development of aquaculture, the catch of grouper has also increased rapidly....

AI Technical Summary

Problems solved by technology

Yellowfin grouper is a high-quality edible fish with low fat and high protein. With the development of aquaculture, the catch of grouper has also increased rapidly. few, most seedlings are still heavily dependent on captured wild seedlings

At present, there are few researches on artificial reproduction methods of yellowfin grouper, and it is impossible to carry out effective factory-scale artificial breeding of yellowfin grouper. The survival rate of yellowfin grouper is low, especially in the process of breeding and breeding. Unstable and weak environmental adaptability, low growth and reproductive capacity of broodstock, resulting in low spawning rate, fertilization rate and hatching rate of artificial breeding of yellowfin grouper, and it is impossible to achieve effective large-scale artificial breeding of yellowfin grouper

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