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Method for offshore farming of large-size salmon and trout in temperate sea area

A technology for large-sized salmon and trout, which is applied in the field of offshore breeding of large-sized salmon and trout in temperate seas, can solve the problems that salmon and trout cannot survive the summer and cannot grow large-sized commercial fish, so as to increase opportunities for opportunistic feeding, High feed conversion efficiency and the effect of improving breeding efficiency

Inactive Publication Date: 2020-10-30
山东深海冷水团海洋开发有限公司
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AI Technical Summary

Problems solved by technology

Due to the high temperature of the upper seawater, salmon and trout cultured in ordinary seawater cages cannot survive the summer, so large-scale commercial fish cannot be grown

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1. Experimental steps

[0024] (1) Purchase eye-eyed rainbow trout eggs in January and hatch them artificially in a fresh water tank. The hatching water temperature is kept at 12±1°C, the dissolved oxygen is controlled at 7±0.5mg / L in clean water, and the static water flow rate is controlled at 15±1L / L. min.

[0025] (2) Breed the hatched larvae in fresh water. By the beginning of November, the weight of the cultured rainbow trout fingerlings can reach 300g±50g. Select healthy fish groups with about the same size and divide them into two groups with equal numbers, which are marked as the experimental group and the control group.

[0026] (3) Inject the seawater of certain velocity in the fish pond, make the salinity in the fish pond be controlled at 10-15ppt, increase the flow of seawater after three days, make the salinity in the fish pond be controlled at 20-25ppt. Increase the flow of seawater after three days, close the fresh water inlet, make the water in the fish...

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Abstract

The invention discloses a method for offshore farming of large-size salmon and trout in temperate sea area. The method uses a sea-land relay method to cultivate fingerlings, the cultivated fingerlingsare put in offshore cages, low-temperature seawater resources in the lower layer of the sea area are used to ensure the stable farming temperature of the salmon and trout in the sea area, after the farming time exceeds one year, the large-size commodity salmon and trout are cultivated, the mechanical damage of salmon and trout is reduced, the mortality in farming is reduced, and the efficiency offarming is improved.

Description

technical field [0001] The invention relates to a method for off-shore breeding of large-scale salmon and trout in temperate sea areas, belonging to the field of aquaculture. Background technique [0002] With the rapid development of my country's mariculture industry, large-scale mariculture in offshore areas has brought about a series of problems such as industrial conflicts, ecological hazards, disease risks, and quality and safety. Therefore, it has become an inevitable trend for the development of my country's mariculture industry to expand from offshore to offshore and deep sea. [0003] Many salmon and trout are fish that can be cultured in both freshwater and seawater. They belong to cold-water anadromous fish. The upper limit water temperature for normal growth is very low, and there is no obvious lower limit temperature, so they are called cold-water fish. There are 14 species of salmonids in China, accounting for more than 20% of the world's salmonids, including ...

Claims

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Application Information

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IPC IPC(8): A01K61/10A01K61/60A01K61/17
CPCA01K61/10A01K61/17A01K61/60Y02A40/81
Inventor 刘爱东高金山徐守科杨立
Owner 山东深海冷水团海洋开发有限公司
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