Dual-network three-dimensional cultivating system for abalones and algae and cultivating method thereof

Abstract

The invention discloses a dual-network three-dimensional cultivating system for abalones and algae and a cultivating method thereof. The cultivating system comprises a dual-barrel net cage platform including an inner barrel and an outer barrel, wherein a plurality of layers of cultivation baskets are suspended in an inner barrel net cage and are used for cultivating the abalones, a palm rope is downwards suspended in an area between the inner and outer barrel net cages, and gracilaria seedlings are clamped on the palm rope. The net cage can resist against natural enemy, therefore the problem that the abalones and the algae cannot be cultivated in a coexistence way in southern opening sea area; furthermore, an 'alga wall' can be formed by outer algae to effectively prevent the impact on the abalones in the inner net caused by ocean current, therefore the physical agility of the abalones consumed by resisting against the ocean current can be prevented; meanwhile, massive oxygen can be generated during the abalone growth, therefore the abalone in the inner net can be soaked in an oxygen-rich water environment, therefore the abalone can be promoted to grow quickly; in addition, the excreta of the abalones can be ensured to be absorbed by the algae for more time because the sieve number of an outer net is denser than that of the inner net, therefore the influence on the sea area environment can be prevented because the excreta flows out the net cage.

Description

technical field [0001] The invention relates to an abalone and algae double-net three-dimensional culture system and a culture method thereof. Background technique [0002] Abalone is a kind of high-end shellfish raised in seawater with macroalgae as its main food source. It has high nutritional value, medical value and good taste, and people carry out artificial breeding for mass production. Abalone farming methods include factory farming, marine pasture farming and sea raft farming. The production of abalone needs to consume a large amount of macroalgae, and the transportation and labor costs are very high. In addition, abalone discharges a large amount of excrement into the sea area during the growth and reproduction process, which will cause eutrophication of the sea water quality and lead to frequent abalone diseases. occur. In the northern coastal areas of my country, in order to solve the above-mentioned problems in the production of abalone, the technology of sea-...

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Problems solved by technology

However, in southern my country, although there are very rich macroalgae resources, due to the poor water quality conditions in algae production areas, it is generally not suitable for abalone and other high-end seafood farming. The combination of abalone and algae farming technology is difficult to carry out. The phenomenon of algae nesting is mainly based on the seasonal polyculture of kelp, a large-scale low-temperature cold-water seaweed, and abalone or sea cucumber

[0003] Abalone and kelp sea-raft nesting methods in northern and southern parts of my country are all carried out in open sea areas. Affected by factors such as nesting density and changes in natural conditions such as ocean currents, the purification effect of algae on abalone excrement is very limited

At present, the macroalgae used for shellfish nesting are mainly kelp, and kelp is a species that grows in low-temperature waters. In the vast southern seas of our country, especially the South China Sea, kelp cannot grow normally, and the macroalgae that grow in other southern seas are also Due to the existence of natural enemies such as bluefish, it is difficult to use raft-style shellfish nesting in open seas

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