Method for clearing fouling organisms in saltwater fish aquaculture net cage

A technology for fish breeding and biofouling, which is applied in fish farming, application, climate change adaptation, etc. It can solve the problems of increased disease risk of farmed fish, poor cleaning effect, time-consuming and labor-intensive problems, and reduce body surface damage and disturbance , gentle temperament, and the effect of reducing the risk of disease

CN102144598AInactive Publication Date: 2011-08-10MARICULTURE INST OF SHANDONG PROVINCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-08-10
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

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.
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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...

Examples

Embodiment

[0016] Embodiment: In the summer of 2010, in the process of cultivating perch, Xu's flat carp, etc. in net cages near the sea in Langya Town, Jiaonan City, Qingdao, Shandong Province, the test adopted the method of the present invention to clean up the fouling organisms on the net clothes of the net cages, and combined with Compared with conventional cleaning methods in the past, it is found that the method of the present invention achieves better results than conventional methods. Details are as follows:

[0017] Use 4m×4m×4m net cages to culture perch, a total of 13, divided into 2 groups: one group is the breeding control group, a total of 8 cages, do not mix other fish, culture perch alone; one group is the polyculture group , totally 5 net cages, according to the method described in the present invention, according to the ratio that is equivalent to the 5% of cultured fry quantity, mixed the wild green horse-faced puffer fry that the sea catches. The two groups of net ca...