Reservoir Cage Breeding Black Ridge Barb Technology In 2003, Huangtian Town, Gutian County, Shuikou Reservoir Fishery Development Reservoir Cage Breeding black spiny barb, a cage of 5mx5mx3m, stocking 50--100g tail fish species 1500--2000 tails, reared for more than 8 months, average tail weight up to 390g, maximum individual up to 850g, yield up to 20--30kg/m2, survival rate over 85%, average 500-500 fish per box --- 600kg, output value 15,000 --- 18,000 yuan, after deduction of the production cost of 10,000 yuan (including fish species, feed, cage depreciation, manual management, etc.), net income 5000 ---8000 yuan, input-output ratio is 1: 1.5--1.8, economic benefits are considerable. The main breeding techniques are described below. First, the choice of the waters 1. Choose a fishing boat that is close to the village and is easily accessible to the deep reservoir bay, which is convenient to manage, and avoid the use of a dry season cage. 2. Choose Xiangyang lee, the original reservoir is farmland or flat open-air waters. This kind of water quality fertilizer is rich in natural food. 3, choose to stay away from the fairways, docks, water within the O.1m/second waters. Such waters are relatively quiet and can reduce the stress response of boxfish. 4. The upper reaches and surrounding waters of chemical fertilizer plants, pesticide plants, paper mills and other pollution sources should not be selected. Second, cage structure 1, cage material: 3x3 polyethylene knot net. 2, cage specifications: a hexahedral closed cage with lid. Box length 5m, width 5m, depth 3m; mesh 3cm. 3. Structure of fishing rafts: Bridge rafts are constructed from large foam floats and pine planks. A fishing bar is generally installed 30 --- 60 cages. 4. Installation of cages: The four corners of the cage are attached to the four inner corners of the pine plank frame. Another 4x6 polyethylene wire is used to fasten the cage around the perimeter of the frame. A 2- or 3-kg heavy stone or sandbag is hung on the bottom four corners of the net so that the cage can be fully formed in water. Net cages should be installed 7-10 days before the fish species are put into the tank, so that the algae attached to the nets can become smooth to prevent the fish skins and scales from being damaged by friction. Third, the stocking of seedlings 1) seed sources and transport methods: In recent years, the growing shortage of wild seed, in addition, the wild seed in the capture of more damage, and the size of different sizes. The artificial seeds are of neat specifications and do not need to be domesticated. At present, artificial breeding mainly uses artificial seedlings. Fish species are transported using the method of oxygenation of fish gills. Transportation time is within 10 hours, and the survival rate is generally above 98%. (2) Specification and density of fingerlings: stocking density of 50g tail weight, 30---40 tails/m2; tail weight 1OOg, 20--30 tails/m2. (3) Restocking time and fish species disinfection: The stocking time should be selected before the spring of each year, that is, from November of the current year to February of the following year. During this period, the water temperature is low, the scales of the fish are tight, and the nets, numbers, handling, etc. It is not easy to damage during operation and has a high survival rate. Before fish box, use 4% - 5% concentration of salt solution for bathing, bath time 5-10 minutes. Specifically, it should be based on the flexibility of the water temperature and fish species. 4. The feed is fed with buoyant particulate material with a protein content of about 30%, and green fodder (including green leaves, alfalfa grass, sudan grass, elephant grass, etc.) is supplemented by high-quality forage grass. At present, there are special pellets for thorn fish and fish on the market, and they can also be replaced with extruded tilapia or extruded eel. As the species is artificially cultivated, the pellets (particle size 1.Omm) can be fed after the human box. After 2 to 3 days, the boxfish can cluster up and grab food. With the growth of the fish, large-size pellets with a particle size of 2-3 mm were gradually added. The daily feeding amount is 3%--5% of the fish's body weight; the daily feeding is twice: 8:00am- 9:00am and 4:00--5:00pm. Green feed should be fresh and non-polluting, chopped and fed. When feeding, the principle of less spreading and slow throwing should be adopted so as to avoid waste. In actual production operations, the amount of bait should also be flexibly adjusted according to weather changes, water temperature, and fish growth. According to the characteristics of thorny abdomen insects, black light can be installed in the cage culture area. Generally, one (8W) is installed per every four to six cages. The light is about 50cm away from the water surface, and a glass blocker is set next to the lamp. , flies, moths, mosquitoes, insects, etc. hit the board and fell into the cage for snails to grab food to increase the natural food. V. Daily Management 1. Check whether the cages are damaged; there are many kinds of wild fishes in the hydropower station reservoir area, among them there are many large and ferocious fish such as bigmouth bass and fish-like fish. These ferocious fish often collide with hunger attacks. Net cages cause damage to the cage. Therefore, it should be checked and repaired in time. 2, cage cleaning: thorn fish intolerance of hypoxia, dissolved oxygen in the water inside the box should be maintained at 4mg / L or more. Therefore, the cages should be flushed in time, and the debris, garbage, floating materials, etc. of the green feed should be removed in time to prevent the plugging of the mesh and the lack of oxygen "pan box." 6. Disease Prevention and Control Thorn fish and fishes have strong resistance to disease, and during the breeding period, they are mainly prevention. Bleaching powder bag or regular spilling of quicklime can be used to disinfect and sterilize aquaculture water. Specific methods: use 150-250g bleaching powder and the same amount of dry fine sand in each woven bag, and hang it in the corner of the cage, each box A bag, medicine bag into the water 1m deep, after the drug is dissolved and then added; or every second and a half with 25--30ppm concentration of lime milk, dipping hot water sprinkling around the cage. Each successive 2 - 3 days. Cage culture and fish barbs are generally less common, but sometimes they suffer from hydromycosis and enteritis. 1. Saprophytic disease: In the first 10 days after a fish species box, it is susceptible to the disease. Use 5ppm baking soda and salt, dilute with water, once a day, for 3 days; or use 3 - 4ppm of salt on the first day, spill with mildew on the next day, then use the above amount of salt on the third day. Splash, the effect is better. 2, enteritis disease: external consumption, bleaching bag, method ibid; oral, norfloxacin 0.5g/kg feed, mix and feed, 2 times a day, for 3-5 days.
Skin Marker Tattoo Pen
Skin Marker Tattoo Pen,Black Pen Holder,Black Tattoo Pen Holder
Novelty Hardware Manufacturer , http://www.ywtattooneedles.com