Method for clearing fouling organisms in saltwater fish aquaculture net cage

Abstract

The invention discloses a method for clearing fouling organisms in a saltwater fish aquaculture net cage. Fish fry is firstly thrown in the saltwater fish aquaculture net cage, wherein cantherines modestus is polycultured according to according to the ratio of 3-8% of cultured fish fry, preferably 5%, at the beginning of cultivation; the individual size of polycultured cantherines modestus is slightly greater than that of the cultured fish fry; and the overall length accounts for 1.3-1.5 times of the overall length of the cultured fish fry. Through the polyculture of cantherines modestus according to a certain ratio, Cantherines modestus continuously ingests the fouling organisms on a net body of the saltwater fish aquaculture net cage so as to continuously clear the net body; the fouling organisms on the net body can be completely removed basically; therefore, the frequency of replacement of the net body of the net cage is reduced, the injuries and disturbances of the cultured fish are effectively reduced, and the risk of diseases of the cultured fish is decreased.

Description

technical field [0001] The invention relates to a method for cultivating fish, in particular to a method for cleaning fouling organisms in net cages for cultivating seawater fish. Background technique [0002] In the cage culture of marine fish, the nets of the cages are almost unavoidably covered with insects such as hydroids, sea anemones, straw worms, hook shrimps, barnacles, mussels, oysters, ulva, enteromorpha and other fouling organisms are attached in large quantities. The non-destructive organisms living on the nets will cause the following hazards to cage culture: [0003] 1. Blocking the mesh, making the exchange of water body inside and outside the cage not smooth, reducing the circulation of water body, resulting in the dissolved oxygen in the water body in the cage and increasing the ammonia nitrogen content in the water body, resulting in a decline in the quality of the water environment. [0004] 2. Delay the discharge of residual bait and feces produced dur...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems existing in the prior art, the present invention provides a method for cleaning fouling organisms in seawater fish culture cages, which solves the problem of poor cleaning effect in the prior art, untimely, time-consuming, laborious, and poor economy, and increases the risk of disease in farmed fish The problem