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

A technology of net cages and seedlings, which is applied in the field of fishery ecological breeding, can solve the problems of large threat to sea cucumber seedlings, small unit area of ​​seedling preservation in net cages of sea cucumber ponds, and large changes in environmental impact, so as to reduce production costs and improve growth rate and survival rate, the effect of extensive promotion

Inactive Publication Date: 2021-08-06
山东省海洋资源与环境研究院
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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 ...

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

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[0020] The technical solution of the present invention will be further described below in conjunction with specific examples, and these examples should not be construed as limitations on the technical solution.

[0021] (1) The experiment period is from June 25, 2020 to September 25, 2020.

[0022] (2) Specifications of experimental cages (3m×1.5m×0.8m). at 0g / m 2 , 100g / m 2 、200g / m 2 、400g / m 2 , 800g / m 2 The algae density gradient of , three replicate experiments were set up.

[0023] (3) 2000 heads / kg of japonicus 1kg are placed in each cage.

[0024] (4) Illumination control: Use sunshade nets to control the daylight at 3000-12000 lx.

[0025] (5) Do not fertilize or change water. The temperature of seawater in the pond is 16-33 ℃, and the salinity of seawater is 25-34.

[0026] (6) Feeding: once a day, 50g per box, bait composition: sea cucumber compound feed+sea mud=1+8

[0027] (7) Cage cleaning: Bacillus (content ≥ 20 billion CFU / g) 5g / box is put in every half...

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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...

Claims

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Application Information

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IPC IPC(8): A01K61/30A01K61/60
CPCA01K61/30A01K61/60Y02A40/81
Inventor 刘义豪周全利刘相全郭治诚相智巍曹体宏李斌
Owner 山东省海洋资源与环境研究院
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