Fattening method and device for crassostrea gigas cultured in north

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 ...

AI Technical Summary

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 in poor water exchange, high mortality, and prolonged fattening time. On the other hand, fattened oysters have sharp edges and are easy to cut. Broken scallop net cages will cause the loss of fattening oysters and damage to the net cages, reduce the fattening output, and the fattening amount per mu will also be low, which will greatly increase the cost of breeding and fattening. In addition, this fattening method is generally mixed into scallop growing cages regardless of size.

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