Method for promoting growth of net cage apostichopus japonicus fry through macrophytic algae

Abstract

The invention discloses a method for promoting growth of net cage apostichopus japonicus fry through macrophytic algae. The method comprises the following steps: (1) putting macrophytic algae: when the average water temperature of a pond is higher than 16 DEG C, selecting gracilaria lichevoides which grows vigorously and is healthy in color, removing miscellaneous algae, and putting gracilaria lichevoides into a 3 m * 1.5 m * 0.8 m net cage according to the density of 200-800 g / m < 2 >; (2) putting apostichopus japonicus fry: selecting disease-free healthy apostichopus japonicus fry, and putting 1 kg of apostichopus japonicus fry with the specification of 2000 fry per kilogram into each net cage; (3) performing illumination and water control: using a sunshade net to control the illumination at 3000-12000 lx in the daytime; controlling the temperature of the seawater in the pond as 16-33 DEG C, and controlling the salinity of the seawater at 25-34; (4) performing feeding and daily management: feeding once a day, wherein the feeding amount accounts for 5% of the weight of apostichopus japonicus fry. According to the method, the growth rate and the survival rate of apostichopus japonicus are increased, the production cost is greatly reduced, the production of apostichopus japonicus fry is ensured, and the wide popularization can be realized.

Description

technical field [0001] The present invention relates to a kind of sea cucumber seed breeding method in cage, in particular to different densities of Gracilaria chrysanthemum ( Gracilaria lichevoides ) to promote sea cucumber ( Apostichopus japonicus ) The method for seed growth belongs to the technical field of fishery ecological breeding. Background technique [0002] The aquaculture area of ​​japonicus in ponds across the country exceeds 500,000 mu. Shandong alone has an annual output value of more than 10 billion yuan in 2018, making it the mariculture species with the highest output value of a single species. Shandong is a major province of japonicus seed production in the country. In 2018, it produced more than 30 billion japonicus seedlings, accounting for more than 60% of the country. In recent years, the area and output of pond net cages have increased significantly. The unit area is small, and it is greatly affected by the environment, especially in summer, which...

AI Technical Summary

Problems solved by technology

Shandong is a major province of japonicus seed production in the country. In 2018, it produced more than 30 billion japonicus seedlings, accounting for more than 60% of the country. In recent years, the area and output of pond net cages have increased significantly. The unit area is small, and it is greatly affected by the environment, especially in summer, which poses a great potential threat to sea cucumber seedlings

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