Shrimp Pond Cage Rearing American Redfish Technology

Jinzhou Fisheries Research Institute of Jinzhou City, Liaoning Province, Fuzhuo Wang Tai and American redfish, also known as dark-spotted red pheasant, scientific name of eye-spotted Pisces. Its appearance is similar to that of the large yellow croaker, which is characterized by reddish color of the adult fish and a black spot at the base of the juvenile tail. Wide temperature and wide salt, anadromous fish. This fish is tender and delicious, with high nutritional value, fast growth, strong disease resistance, and a wide range of feed for breeding. It is an excellent saltwater fish species introduced and successfully breeding in the United States from 1991 in the United States. Breeders can use unused shrimp ponds to raise American redfish (or direct stocking), which is both simple and easy to use and can increase the overall efficiency of shrimp ponds.

First, shrimp pond utilization and transformation

(1) Shrimp ponds are to be converted into abandoned shrimp ponds, and the area of ​​single ponds should be 5-10 mu. The bottom is sand and mud bottom and has the ability to enter and drain. The water level ranges from 1.5 to 2 meters.

(B) dredging disinfection drained water drying in about 20 days. Bulldozers remove 10-20 cm of floating mud and level the bottom of the pool. About 30% of available chlorine bleaching powder disinfection, 10 kg per mu, diluted Quanchiposa. Drying and draining water for 10 days, and then washing the ground l-2 times.

(3) Water Intake Requirements In the middle and late May of the month, use 20-40 mesh filter to enter the water (such as shrimp can be advanced into the water), pay attention to avoid the tide head water, falling tide water. Water depth 1.5-2 meters. Transparency 60 cm; dissolved oxygen 6 mg/l or higher; specific gravity 1.020-1.026; pH 8.0-8.5.

Second, cage settings and specifications

(a) The cage setting depends on the shape of the shrimp pond. Generally take the width as the trend, the main rope for driving piles, two buoys on the buoys, and the distance between the cages is 2.5-3.5 meters (reserve empty space).

(2) Cage specifications Feeding fish cages of 3 cm or more in cages 2 m 2 m 2.5 m mesh 1.2 cm (not to escape the fish), and the nets are made of polyethylene mesh. More than 100 grams of fish use 3.5 cm mesh; 200 grams or more to 5 cm mesh; cage size 3 meters 3 meters 3 meters. The perimeter of the netcloth is tied with a polyethylene rope stiffener, and the four frames of the net are tied with bricks to adjust the net weight of the net box. The cage can be covered with a net to prevent escape. (to be continued)

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