Feeding cage fish culture has the advantages of high density, intensive, intensive and high yield and so on, so it has developed rapidly in recent years. However, due to high production costs, many diseases, and weak markets, it often leads to high investment, high output, high risk, low efficiency, and some even losses. Reservoir cages do not feed on ecological farming, and they are used directly for the reservoir's natural food, and are extensively grazing. In this model, first, the feed is not fed during the entire breeding period, no drugs are used, the product produced is pollution-free quality fish, and the second is that the stocking density is thin, the disease is low, and the survival rate is high, except when the fish species enter the box. Death caused by injury, the general period of disease during the cultivation, the survival rate of more than 95%; Third, investment province, low risk, stable efficiency. In 1998, the author successfully conducted a demonstration test at Yangjiao Reservoir Bay of Shuikou Power Station Reservoir in Gutian County. A cage of 3m x 3m x 3m, with a one-time investment of only 100 yuan, can produce 100-150 kilograms of flowers and white pods every year, with an output value of 600-900 yuan, minus the production cost of 300 yuan, and net profit of 300 yuan. - 600 yuan. A farmer breeds 20-30 boxes and can earn more than 10,000 yuan a year. The project was soon promoted and developed among the people in the reservoir area. In 2001, only Shuikou Town, Gutian County had developed more than 5,000 boxes and became a good project for the development of the people in the reservoir area and the production of a “short, flat, fast†wealth. The main breeding methods are described below. 1 The choice of water area for water selection is crucial. Because no bait is given, the quantity, naturalness, abundance, and apology of natural foods in the water area are directly related to the effectiveness and success of breeding. A reservoir, whether it is eutrophic or lean and nutrient, will form a “relative nutrient zone†or “relatively lean nutrient zone†due to different geographical conditions and ecological environment. If the cage is not feeding ecological breeding, it is necessary to select the "relative nutrition area" of the waters. Generally, it is better to choose the reservoirs and river channels that are provided by Xiangyang Beifeng and Youxi River, and it is better to inject the domestic sewage of cities and towns. The upper reaches of fertilizers, pesticides, paper mills and Other pollution sources of water should not be selected. 2 cage structure 2.1 cage material using 3x3 polyethylene knot net. 2.2 Cage specifications The cage is 3 meters long, 3 meters wide, 3 meters deep, and mesh 3 to 4 centimeters. It is a hexahedral enclosed cage with a lid. 2.3 The cage bracket is made of 4 pieces of bamboo and bamboo with a length of 3.5 meters and a tail diameter of more than 4 centimeters. It is a square rack of 3 meters x 3 meters. 2.4 There are two methods for the installation and fixation of cages for cage installations. One is anchorage rope fixation method. Each group of 10 cages is a set of two polyethylene cores with a diameter of 2 cm. Ligation along both sides of the cage is a series connection. A row, each box spacing is 1 meter, each row spacing is 6 meters, both ends of each row are straightened and tightened by the anchor rope. Each iron anchor weighs 10 kilograms; the wrong rope has a diameter of 3 centimeters and the length of the anchor rope should be greater than 2.5 times the depth of the water. The second is the cable fixing method: The cable is a polyethylene rope with a diameter of 4 cm. The cable crosses the water and is stretched and tightened and fixed on the two shores. The two cables are set at a distance of 3.5 meters and the distance between the two cables is 6 meters. The cages are fixed between two cables 3.5 meters apart and each box is 3 meters apart. The cage should be installed one week before the fish species are put into the box, so that the coarse nodule nets will become smooth, preventing the epidermis and scales from being rubbed and damaged when the fish species enter the box. 3 Arrangement and distribution of cages The arrangement of cages on the surface of the water should be staggered in the form of "product" or "plum". The distribution density of cages is preferably 1:100 for cage area and partial water area. 4 fry stocking 4.1 stocking species and the proportion of stocking typical filter-feeding fish a flower, white peony-based, with a small amount of squid, tilapia. The proportion of flowers and fairies is 8:2. 4.2 Stocking specifications and density It is better to stock more than 50 grams of fish. Stocking density: 20 - 25/m2. 4.3 The disinfection of fingerlings is done by salt water bathing. This method is both effective and safe. The salt concentration is 40-50 g/L and the bathing time is 5 to 10 minutes, depending on the water temperature and species composition. Bathing can be done in a canvas bucket or in a cabin that is filmed. 5 Daily management does not require special management. A laborer can manage 20 cages during leisure time or after meals. There are three main daily management tasks: 5.1 Removal of rubbish Due to the influence of wind, debris such as rubbish in the warehouse often sticks to the wall net or accumulates on the lid, affecting the exchange of water within the box and the fish Normal activities. Rubbish can be picked up by sea fishing and bagged and shipped to the shore for drying and burning. 5.2 Adjusting the mesh shape will cause distortion and deformation of the cage every time heavy winds and heavy rain or reservoir water level rises and falls, especially when using the wrong rope to fix it. Therefore, the tightness of the cables and anchor ropes should be adjusted frequently and timely so that the cages can be fully deployed and the maximum aquaculture capacity can always be maintained. 5.3 Cage Cleaning The netting will be blocked by excessive algae attached to the mesh, affecting the exchange of water in the tank. During the cultivation period, it should be cleaned regularly. When cleaning, the net can be lifted off the water with a bamboo strip or brushed with a long-handled nylon brush on the net. Usually every 15 - 20 days can be cleaned once.
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