Fattening method and device for crassostrea gigas cultured in north

A technology for growing oysters and oysters, which is applied in fish farming, application, climate change adaptation, etc. It can solve the problems of increasing the cost of breeding and fattening, the loss of fattening oysters, and prolonging the time of fattening, so as to facilitate feeding and growth, and improve the survival of fattening The effect of rate, expansion area and scope

Pending Publication Date: 2021-08-06
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The long oysters cultured and fattened in northern my country are mainly long oysters raised in raft type. After they grow to commercial specifications, they are peeled off from the scallop shells, put directly into scallop growing cages, and then hung in sea areas for breeding and fattening; This fattening method is due to the small volume of scallop growing cages and oysters piled up on each layer. On the one hand, it affects feeding and water exchange, resulting...

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  • Fattening method and device for crassostrea gigas cultured in north

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Embodiment 1

[0029] A method for fattening northern cultured oysters, the method comprising the steps of:

[0030] (1) Select sea areas for fattening: choose deep-water sea areas rich in single-celled algae, and sea areas that meet the national first-class water quality standards are fattening sea areas;

[0031] (2) Selection of oysters to be fattened: Sorting oysters that are not fattened (fullness less than 10%) in raft suspension into different specifications of 8-10cm, 10-12cm and 12cm or more. into the same fattening device for subsequent processing;

[0032] (3) Put the oysters to be fattened into the fattening device: evenly load the fattened oysters of different specifications above into different fattening devices;

[0033] (4) The fattening device is put into the fattening sea area: the fattening device loaded with fattening oysters is transported to the selected fattening sea area for fattening, and the fattening device is hung on the breeding buoy;

[0034] (5) Management du...

Embodiment 2

[0036] The fattening device described in embodiment 1 (such as figure 1 (shown) is a cuboid screen frame 1, which is surrounded by polyethylene plastic hard net 2, the upper part of the screen frame 1 is provided with a screen cover 4, and the inside of the screen frame 1 is provided with a mesh transverse partition 3. Divide the inside of the screen frame 1 into multiple grids. The net cover 4 is provided with a hook 5 for sealing the net cover 4 on the net frame 1 . A plurality of binding holes 6 are arranged around the net frame 1 for binding and fixing a plurality of net frames 1 . The pore diameter of the polyethylene plastic rigid net 2 is 3.0-4.0 cm. The bottom of the net frame 1 is also provided with a small crosspiece with a height of 2-5cm, which is used to prevent oysters from gathering. The small crosspiece is linearly arranged and crossed at the bottom of the net frame 1. Polyethylene rope is fixed on the bottom of net frame 1.

[0037] The specification desig...

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Abstract

The invention provides a fattening method and device for crassostrea gigas cultured in the north. The fattening method comprises the following steps: selecting a fattening sea area; selecting to-be-fattened crassostrea gigas: selecting crassostrea gigas which is bred in a raft hanging mode and has the fullness degree smaller than 10%; uniformly loading the to-be-fattened crassostrea gigas into the fattening device; putting the fattening device into the fattening sea area: transporting the fattening device loaded with the to-be-fattened crassostrea gigas to the selected fattening sea area for fattening, wherein the fattening device is hung on a culture raft frame; and conducting management in the fattening period. The fattening method and device for the crassostrea gigas cultured in north solve the problems of crassostrea gigas accumulation and poor water flow in the traditional crassostrea gigas fattening process; and the ingestion and growth of the fattening crassostrea gigas are facilitated, the fattening effect of the cultured crassostrea gigas is improved, compared with a traditional breeding fattening technology, the fattening survival rate can be increased by 20-30%, the fattening time is shortened by 15-20 days, and the quality and yield of the cultured crassostrea gigas are remarkably improved.

Description

technical field [0001] The invention relates to a method for cultivating oysters, in particular to a method and device suitable for fattening northern long oysters, and belongs to the technical field of aquaculture. Background technique [0002] Oyster is one of the four major cultured shellfish in my country. Its output in 2019 was 5.2256 million tons (2020 China Fishery Statistical Yearbook), which accounted for 1 / 3 of my country's total shellfish culture production and accounted for more than 85% of the world's total oyster production; Long oysters are cultivated oysters in the north, also known as Pacific oysters. Hong Kong oysters are mainly cultivated in Guangdong and Guangxi, and Portuguese oysters are cultivated in Fujian. They are the three major oyster species cultivated in my country. At present, the oyster farming method in northern my country is mainly the traditional raft-type hanging rope culture in shallow seas and inner bays. The characteristics of this kind ...

Claims

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Application Information

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IPC IPC(8): A01K61/54A01K61/55
CPCA01K61/54A01K61/55Y02A40/81
Inventor 于瑞海李琪邹多李琦孔令峰刘士凯
Owner OCEAN UNIV OF CHINA
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