The gums are commonly known as "dental teeth" and "left mouth." The fish is delicate and delicious, and it is particularly suitable for fish fillets, and its utilization rate is high. In order to promote and promote the development of the fish in the south-adapted areas, and help farmers to avoid detours, this article according to the successful experience of southern domestication, the urine indoor cement pool circulating water aquaculture technology introduced as follows: First, the condition of the fish pond cultured gums The site should be selected where the water source is clean, pollution-free, water exchange is convenient, power supply is guaranteed, and transportation is convenient. The workshops can be made of masonry walls. The roofs are made of steel frames, wood frame structures, and covered with glass tiles or asbestos tiles to control the light, because excessive light will disturb the gums and make the bottom of the pool and the wall of the pool. Cultivated algae thus affect fish feeding and growth. The shape of the cement pool is rectangular, square, octagonal, etc., with an area of ​​30 to 80 square meters, a water depth of 1 to 1.2 meters, and a drainage port direction of 2 to 3%, with 4 to 6 inlets. Into the water in one direction, so that the water to form a circulation, so that the smooth discharge of residual baits and excrement. To prevent gums from jumping out, the pool wall should be 30 cm to 50 cm above the water surface. Second, fingerlings of fingerlings can be harvested directly from natural sea areas or purchased from farms. The quality of the latter is better. When the aquaculture pond water temperature above 13 °C can enter the fish species. The fish species is required to have a total length of 10 cm or more, uniform body color, clear pattern, close to natural color, no whitening and blackening, and strong physique. If you put it in your palm, it feels like a good bouncing fish. Frog rot, redness and congestion on the body surface and diseased fingerlings in the cervix should not be required. Stocking densities are as follows: body length ranges from 150 to 100 tails per square metre from 10 centimeters to 15 centimeters; body length ranges from 50 centimeters to 25 centimeters per square metre to 35 tails. Third, bait feed The feed used for breeding gums is mainly full-priced compound feed and small trash fish. The bait fish mainly includes jade fish, gobies, and eel, among which the fish with low fat content is preferred. Normally two times a day (at 7 am, 3 pm), the amount of feeding is about 3% of the body weight of the fish. When the water temperature exceeds a certain range (>25°C or <12°C) or when a medicinal bath is used, the number of feedings should be appropriately reduced or the feeding should be stopped. Feeding should be uniform, avoid feeding a single bait for a long time, so as not to nutrition. Fourth, the daily management of fish species into the pool after a period of time to be based on their growth conditions for proper sorting, the fish after sorting not only high survival rate, fast growth, and the specifications are neat and easy for feeding and management. After each sorting, 810-6 to 1010-6 oxytetracycline or 110-6 to 210-6 nitrofurazone bath may be used for 1 hour to 2 hours to prevent bacterial infection due to scratches. Pay attention to stop food before sorting, and operate lightly and quickly when operating. When the water quality is poor or there is accumulation of residual bait at the bottom of the pool, the method of lowering the water level may be used to increase the water exchange rate, and the residual bait may also be removed by siphoning or sweeping. During the cultivation, the water exchange capacity is proportional to the water temperature and the culture density. When the water temperature is generally lower than 15°C, the water exchange volume is between 5 times/day and 10 times/day. As the temperature increases, the water exchange volume should be increased or kept high. The water level. In the summer hot season, the water exchange volume should be 12 times/day to 24 times/day in order to keep the water temperature low and make the gums safe in summer. V. Disease prevention and treatment Add 310-6～510-6 vitamins C, E and vitamins in feed during the high temperature season; use 210-6 formalin or 1010-6 potassium permanganate bath before entering the pool. 3 minutes; regular feeding of baits, chopped small fish can be added after each kilogram of antibiotics 50 mg to 75 mg, soaked for 30 minutes after feeding, once every 10 days; every 15 days to 20 days with bags or splash Disinfectants (such as potassium permanganate) are used to disinfect water; timely removal of dead and diseased fish from the pool prevents disease transmission. Experience has shown that appropriate mixed-active fish (eg, grouper, redfish, etc.) can reduce the amount of residual baits, increase feed utilization, and increase dissolved oxygen in water. The common diseases of gums are mainly two kinds: First, bacterial diseases, the main symptoms are fin congestion, skin and muscle bleeding or inflammation of the intestines, abdominal swelling. Can be used per kilogram of fish with antibiotics 75 mg to 100 mg of bait fed treatment. The second is trichodiasis. Common parasitic parasites are parasitic on the axilla and body surface and can be killed by a 1:6000 concentration of formalin.
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