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A high-density breeding system for large-scale oyster seedlings

A high-density seedling technology, applied in climate change adaptation, fish farming, application, etc., can solve the problems of large labor operation, low bait utilization rate, and large floor area, and overcome the large floor area , Improve the utilization rate of bait, and remove the effect of dead angle of water flow

Active Publication Date: 2016-03-16
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the indoor cultivation of shellfish seedlings in my country mostly adopts extensive cement pond cultivation, which has the disadvantages of large area, high water consumption, low bait utilization rate, and large labor operation.

Method used

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  • A high-density breeding system for large-scale oyster seedlings
  • A high-density breeding system for large-scale oyster seedlings
  • A high-density breeding system for large-scale oyster seedlings

Examples

Experimental program
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Effect test

experiment example 1

[0035] Breeding facility parameters: 500L of effective breeding water, 200L of water in the purification pool, air oxygenation DO maintained above 6.1mg / L, salinity 30-32, water temperature 21°C-27°C, pH 8.1-8.3.

[0036] The fertilized eggs of Portuguese oyster (Crassostrea angulata) after dissection, fertilization and egg washing were hatched to D-shaped larvae at a density of 80 / ml in the hatching bucket, and the shell length was about 70 μm at this time. Continue to cultivate for about 12 hours. After the shells of larvae harden and reach a shell length of 75 μm, they are collected, washed with purified seawater, and then transferred to the system of the present invention for cultivation. The initial stocking density is 52 / ml. After 30 days of cultivation, the larvae grow to an average shell length of 290 microns, and the survival rate is 91%. At this time, about 30% of the larvae have eye spots and can be transferred to the attached seedling pond for seedling picking. The...

experiment example 2

[0038] Parameters of breeding facilities: 500L of effective breeding water, 200L of purification pool water, air oxygenation DO maintained above 6.1mg / L, salinity 30-32, water temperature 26°C-29°C, pH 8.1-8.3.

[0039] The pretreatment process of the larvae is the same as in Example 1. The initial density of breeding is set at 100 / ml. After 23 days of cultivation, the larvae grow to an average shell length of 290 microns, and the survival rate is 65%. At this time, about 30% of the larvae have eyes. point, it can be transferred to the attached seedling pond for seedling picking. Feed dosage reference in the breeding process Figure 4 .

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Abstract

The invention belongs to the field of aquacultural engineering, and particularly relates to a large-scale high-density oyster spat breeding system. Seawater is purified through a source water treatment device, then enters a biological purifying pool, is pressurized through a water pump and flows through a filling port of a bait trickling pump, seawater carrying high-concentration bait enters a high-density breeding container through an annular spraying-type water incoming pipe, and water flow converges at the bottom of a conical body of the breeding container to be lifted through an air-lift diversion pipe and flows out of the breeding container through a combined-type filtering drum to reenter the purifying pool. The purifying pool is provided with porous fiber filtering cotton, biological filler and a microalgae vitality restoring device, and an aerator pipe is connected inside the air-lift diversion pipe. By the large-scale high-density oyster spat breeding system, bait utilization rate is remarkably increased, closed recycling of breeding water is realized, and the defect that conventional shellfish breeding is large in occupied space, high in water consumption, low in bait utilization rate, large in labor operation quantity and the like is overcome effectively.

Description

technical field [0001] The invention belongs to the field of aquaculture engineering, in particular to a high-density cultivation system for large-scale oyster fry. Background technique [0002] The industrial circulating water cultivation of shellfish seedlings is a new seedling mode that is energy-saving, low-emission, healthy and efficient, and is an important direction for the development of the shellfish seedling industry in the future. The main advantages of this breeding mode are: during the seedling cultivation process, the bait is fed accurately and on demand, the seedling cultivation density is high (>50 / ml), and the water recycling rate is high (>90%), which can greatly improve the Improve the utilization rate of bait, water resources, etc., greatly save the land use area, facilitate installation and transfer, and save labor costs. [0003] At present, the indoor cultivation of shellfish seedlings in my country mostly adopts extensive cement pond cultivatio...

Claims

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Application Information

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IPC IPC(8): A01K61/00A01K63/04
CPCY02A40/81
Inventor 邱天龙刘鹰郑纪盟曾志南祁剑飞张校民
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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