Semi-submersible safe aestivation device and aestivation method for stichopus japonicas pond culture

Abstract

The invention discloses a semi-submersible safe aestivation device and aestivation method for stichopus japonicas pond culture. The device comprises multiple semi-submersible safe aestivation units, wherein the main body of each semi-submersible safe aestivation unit is a semi-submersible stichopus japonicas substratum, and attachment plates I and attachment plates II are fixed in each substratumby slots; and the attachment plates I and the attachment plates II alternately cover the bottom of each substratum, so sunlight does not irradiate the bottom of each substratum, and cultured stichopusjaponicas is freely accessible to the sub-submersible substratums. A dissolved oxygen probe and a water temperature probe are disposed on the bottoms of the semi-submersible substratums to realize real-time monitoring of dissolved oxygen and the temperature of a water mass in the semi-submersible substratums. The temperature of water in the semi-submersible substratums can be reduced by low-temperature underground well water, and the content of dissolved oxygen in the semi-submersible substratums is higher than 4mg / L through connection of a nano air line and an aerator. The device and the method disclosed by the invention can effectively shorten time of hibernation and aestivation of stichopus japonicas, prolong a growth period of stichopus japonicas and increase economic benefits of stichopus japonicas culture.

Description

technical field [0001] The invention relates to a semi-submersible safety summerization device and method for sea cucumber pond culture, belonging to the technical field of aquaculture. Background technique [0002] In recent years, under the influence of extreme weather in summer, the cultivation of sea cucumbers in Shandong and Liaoning provinces suffered heavy losses. For example, in August 2013, affected by the extreme weather of high temperature and heavy rainfall, Shandong, the main producing area of ​​northern japonicus, was affected by aquaculture area of ​​about 260,000 mu, with a mortality rate of about 30-40%, and some areas reached more than 60%, which increased the local aquaculture industry. caused huge economic losses. Among them, 80%-90% of the farmers in Jimo, Haiyang, Rushan, Wendeng, Laizhou, Dongying and other places were affected by the disaster, and about 20%-30% of them lost production, which seriously affected the harvest of the next year; Affected ...

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Problems solved by technology

Covering the shading net requires a support on the upper part of the pond, and it is very easy to blow the shading net in strong winds. The normal use of the shading net is replaced once a year, which requires a large amount of engineering and high costs; the method of mixing underground well water is aimed at Small-area japonicus breeding ponds (within 20 mu) still have some effect, while large-area japonicus breeding ponds have almost no effect, and this method needs to draw a large amount of underground well water, which consumes a lot of electricity

The high temperature resistance of the screened sea cucumber is 1-2°C higher than that of the general sea cucumber, and it needs to be continuously selected and bred for more than three generations to obtain a new strain of sea cucumber with a certain high temperature resistance. The time period is long and the effect is limited.

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