Parent haliotis discus hannai mature-promoting method capable of realizing early breeding

Abstract

The invention discloses a parent haliotis discus hannai mature-promoting method capable of realizing early breeding, which can improve the fatness, egg laying amount, fertility rate, egg rate and fry survival rate of parent haliotis discus hannai, and comprises the following steps: selecting grown haliotis discus hannai, which is characterized by shells of at least 9 centimeters, gland maturity of 30 to 40 percent, G / L3 of more than 0.145, high activity and sorptive ability and no diseases as parent haliotis discus hannai, wherein the ratio of the number of male haliotis discus hannai to the number of female haliotis discus hannai is 80-100:500-1,000; and culturing the parent haliotis discus hannai in an early period, a middle period and a later period, wherein in the early period, the culture time is 40 to 50 days, the water temperature is 15 to 18 DEG C, and the parent haliotis discus hannai are fed with saline kelp; in the middle period, the culture time is 40 to 50 days, the watertemperature is 17 to 22 DEG C and the partent haliotis discus hannai are fed with fresh kelp; and in the later period, the culture time is 20 days, the water temperature is 9 to 22 DEG C, and the parent haliotis discus hannai are fed with dried nori.

Description

Technical field: [0001] The present invention relates to a method for raising seedlings of wrinkled plate abalone in advance, in particular to a wrinkled plate abalone parent abalone which can raise seedlings early and can improve the fullness of parent abalone, egg production, fertilization rate, egg hatching rate and seedling survival rate. Ripening method. Background technique: [0002] Haliotis discus hannai is an important marine biological resource in my country. It is naturally distributed in the Bohai Sea, the Yellow Sea and the Sea of ​​Japan. It is known as the soft gold of the ocean and ranks first among the eight marine treasures. Use value. For example, abalone contains Baolingsu, which can destroy the metabolic process of cancer cells and improve the body's immunity; the shell of abalone, commonly known as shicassia, can be used for the treatment of eye-related diseases. Abalone wrinkle is one of the species with the most economic value in the family Abaceae, ...

AI Technical Summary

Problems solved by technology

[0004] 1. During the breeding period, the weather and sea conditions fluctuate greatly, and it is impossible to catch abalone from the sea;

[0005] 2. The parent abalone in the reproductive sensitive period has weak adaptability to the artificial breeding environment, resulting in a low survival rate;

[0006] 3. From July to August, when the water temperature exceeds 20°C, the main bait for the metamorphic larvae after sinking --- benthic diatoms reproduce slowly and age easily, making it difficult to meet the feeding requirements of the metamorphic larvae;

[0007] 4. When winter came that year, the young abalone bred were too small and had weak resistance, so the mortality rate was very high during the winter

The disadvantage of this method of promoting ripening is that the plumpness of parental abalone decreases before raising seedlings, impetigo is easy to get during the process of promoting ripening, and the size of seedlings is relatively small at the time of emergence (November), with an average of 1.5 to 2.0 cm