Method and device for preventing falling of northern suspended oysters in culture period

Abstract

The invention discloses an anti-falling method and device in the northern hanging culture period of oysters. The anti-falling method is based on an anti-falling device, and a specific anti-falling breeding method is combined. A main body of the device comprises an anti-falling device frame and an oyster hanging cultivation rope; the anti-falling device frame is a cylindrical closed frame defined by iron wires, and the frame is covered with a polyethylene net. An oyster hanging cultivation rope penetrates through the inner axis position of a frame of the anti-falling device, a plurality of chlamys farreri shells are clamped in the middle of the oyster hanging cultivation rope, the chlamys farreri shells are fixed through a chinlon monofilament rope, and a falling stone is connected to the lower portion of the oyster hanging cultivation rope. According to the method and the simple device for preventing the crassostrea gigas from falling off, the defect that crassostrea gigas falls off due to the influence of stormy waves along with individual growth in the growth process caused by traditional crassostrea gigas hanging rope culture can be overcome, on one hand, the falling-off degree is reduced, on the other hand, the falling-off individuals can be collected at the bottom of the device, crassostrea gigas cannot be lost, and the crassostrea gigas is prevented from falling off. The method breaks through the traditional oyster breeding method and technology.

Description

technical field [0001] The invention relates to a method for culturing oysters, in particular to a method for preventing oysters from falling off during the culturing of oyster slings, and belongs to the technical field of aquaculture. Background technique [0002] Oyster is the world's largest cultured shellfish, and it is one of the four major cultured shellfish in my country. Its output will be 5.428 million tons in 2020, accounting for 1 / 3 of my country's total shellfish aquaculture output and 85% of the world's total oyster output. %above. At present, the cultivation method of oysters in northern my country is mainly the raft-type seedling sling cultivation in the inner bay of the shallow sea. The advantages of this method are that the cultivation method is simple, the cultivation cost is low, the labor intensity is small, it does not require a large number of management personnel, the management is convenient, and the cage does not need to be changed. And inverted cages...

AI Technical Summary

Problems solved by technology

At present, the oyster culture in northern my country is mainly the raft-type seedling-slinging rope culture in shallow seas and inner bays. The advantages of this method are that the culture method is simple, the culture cost is low, the labor intensity is small, it does not require a large number of management personnel, the management is convenient, and there is no need to change cages. And inverted cages, only need to increase the floating ball regularly according to the growth to improve the buoyancy of the buoy to prevent sinking, etc. Therefore, it is deeply loved by the farms. , when the individual grows to 5-6cm, it will partly fall off in the weather with strong wind and waves, and the fallen oysters will sink to the bottom of the sea, and generally the large ones will fall off first, so it will inevitably cause losses or reductions in the production of oysters. The production reduction is generally 10-20%, and the shedding is more severe when the individual is large, about 30%

[0003] In addition, another disadvantage of this breeding method is that there are many attachments on the surface of the sling and the cultured oyster shell, which affects the growth on the one hand, and affects the appearance of the oyster on the other hand. Thus affecting the quality of oysters, these attachments can also account for 15-20% of the weight, and need to remove impurities and rinse when harvesting and selling

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