Recently, the mobile cage-net fish farming method is being widely adopted in Pyongyang.
The method enables effective use of labour and feed and helps save resources and energy needed for water supply and increase fish production.
The mobile cage-net fish farms in Taedonggang, Phyongchon and Tongdaewon districts have introduced advanced farming methods.
They arranged fishes such as carp and silver carp in tiers and looked into the growth conditions of fish and water quality indexes regularly, while strictly observing the rules on the amount of feed and feeding time so as to improve the fattening rate on a constant basis.
The Taedonggang Fish Farming and Seed Fish Production and Supply Centre under the Pyongyang Fish Farming Management Bureau has built a mobile cage-net farm on the Taedong River in a distinctive way.
The farm set up between the Taedonggang and Yanggak bridges uses computers to automatically control over 30 automatic fish feeders, light traps and neon lights installed at each cage-net and monitor water temperature and pH in real time.
It also established a feed supply system that controls the amount, frequency and time of feeding at each cage-net automatically according to the kinds and numbers of fishes and seasons, thus saving feed as much as possible.
By taking advantage of the biological features of fishes which live in different depths of water, they grow silver carp, Aristichythys nobilis, grass fish, Ryongjong fish, carp and catfish in a three-dimensional way.
It is also noticeable that they installed dozens of solar panels on the roof of the farm to provide themselves with electric power for management and operation.
Meanwhile, Kangdong County is breeding highly-productive catfish and tilapia in cage-nets on a large scale.
Similar farms in the city are striving to set up production bases for floating feed and animal protein feed.
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