Method for adjusting salinity of recirculation aquaculture system with seawater to improve freshwater fish quality

Abstract

The invention discloses a method for adjusting salinity of a recirculation aquaculture system with seawater to improve freshwater fish quality. The method comprises the following steps of: culturing freshwater fishes by using the recirculation aquaculture system; culturing freshwater fishes which have been cultured into commodities in scattered ponds in the recirculation aquaculture system of a certain amount of seawater in stages periodically and sequentially for a time; and adding a certain amount of seawater into the recirculation aquaculture system to adjust the salinity of water in the recirculation aquaculture system. Compared with the prior art, the method has the advantages of realizing living body purification of the freshwater fishes, improving the quality of fish flesh, guaranteeing food safety, improving culture density, breeding 50-70 kg of fish in every cube of water body and breeding a plurality of batches of fishes each year, along with high economic benefit, low cost, simplicity and easiness in operation.

Description

technical field [0001] The invention belongs to the field of freshwater fish cultivation, and in particular relates to a technology for improving the quality of commercial freshwater fish. Background technique [0002] Freshwater fish culture has two modes in the prior art, the one is scattered pond culture, and the 2nd is recirculating water culture. The disadvantage of scattered pond culture is that due to the difference in the environment and water quality of the culture area, as well as the difference in bait, the quality of the finished fish is uneven, and some even fail to meet the food hygiene standards. Recirculating aquaculture can realize factory farming, and its quality can reach a certain standard, but the quality of fish is not satisfactory. Therefore, how to improve the quality of cultured freshwater fish is a technical problem to be solved in this field. In foreign countries, there is a process of purifying the cultured fish with poor water quality before th...

AI Technical Summary

Problems solved by technology

In foreign countries, there is a process of purifying cultured fish with poor water quality before they go on the market. The purified culture is only limited to breeding the fish in a culture system with good water quality for a period of time to make it meet the requirements of food hygiene. The quality is useless change

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