Ao tilapia is a tilapia species cultivated in large areas in Guangdong. In order to explore high-yielding aquaculture technology and raise the level of culture, we conducted a high-yield aquaculture test for Anopheles tilapia in 1995 and achieved good results. Pond area of ​​3.2 acres, the total production of commercial fish 6730 kg, the total output value of 89530 yuan, the profit of 38500 yuan, the average yield of 2103 kg per mu, mu profit of 12830 yuan. The main technical measures are summarized as follows:
1. Pond conditions and choices. The test ponds are flush with the edges and can be used to automatically receive water from the tide of the Pearl River mouth. The water depth is maintained at 1.7m or more, and a 2.2-kilowatt impeller-type aerator is provided in the pool. 10 days before the release of the fish species, Qingtao was splashed with tea bran 30-40 kg/mu.
2. Fish stocking and matching. The fish stocking principle is "high-density, large-scale, and early spring competition." By the end of March, the temperature of water began to rise, and the stocks of winter-feeding species were quickly stocked. A total of 5,500 Ao tilapia fish stocks were stocked at 142 g, and 7,000 Ao tilapia fishes at 93 g were stocked. 60 g of freshwater oysters, 800 tails, 120 g of salmon, 180 squid, 36 g of Baihuaqing, and 100 g of 10 g of squid, and the fish once put enough, with an average density of 4,600 tails/mu.
3. Feeding management.
(l) Cluster domestication. The conditioned reflex signals of fish feeding were established by sound. After a certain degree of domestication, the fish began to gather food on the cluster and set up a fixed food field within 20 meters of Shangtoutoutang.
(2) Feeding. The starting temperature for the growth of A. tilapia was 16°C, and the fishes were fed on the second day of the pond, so that they could start early feeding, early feeding, and late feeding, extending the growth period of the fish. In the feeding process, we insist on hand-spreading, with the principle of “slow, fast, slow, less, more, and lessâ€, properly expand the feeding range to ensure that the fish can feed the feed and feed it twice a day, 9:00-10:00 am 4:00-5:00 PM.
(3) Daily feed amount. The amount of feed should be appropriately increased or decreased according to changes in water temperature, weather conditions, and predation by fish. Generally, in March, the water temperature is low, and the daily feed amount accounts for 2% of the fish's body weight. From April to June, the water temperature is most suitable for fish growth. The amount of feed accounts for 6% of the fish's body weight. From July to September, during the high temperature season, the daily feed amount accounts for 4% of the fish's body weight. It maintains fish populations becoming full, with hunger and appetite craving; from October to December, autumn cool, the water temperature drops, The feed amount is 5% of the fish's body weight.
(4) Fish disease control. Adhere to the principle of "prevention first, prevention and control both." Before stocking, fingerlings are soaked with 30ppm potassium permanganate solution for 15 minutes to disinfect the fish. From April to September, it is a fish disease-prone season. Every 15 days, bleaching powder lppm or quicklime 20kg/mu Quanchiposa. . No major fish disease occurred in the breeding process.
(5) Water quality and dissolved oxygen. The pond can make use of the tide of the Pearl River Estuary. Small water changes are performed every day, and two large tides are changed every month. In May, the water quality improvement agent produced by the company is used to maintain good water quality. In April-September, use oxygen machine to increase dissolved oxygen, normal weather, 4:00-8:00 in the morning boot; hot or weather changes, 7:00 pm morning 8:00 boot.
4. Fishing listing. According to the large-scale and high-priced market characteristics of A. tilapia, we have controlled the market size of A. tilapia at 0.46-0.75 kg/silo to achieve better economic benefits. On July 8th, they began to arrest and arrested Daliuxiao. Until last March 18th in Qiantang, except for some tilapia that died in early February, they received a total of 5,586 kg of A. tilapia and 390 kg of freshwater fish.é³™ 315 kilograms, 243 kilograms of flowers and 196 kilograms of river urns, totaling 6,730 kilograms. The average price of A. tilapia is 13 yuan/kg.
1. Pond conditions and choices. The test ponds are flush with the edges and can be used to automatically receive water from the tide of the Pearl River mouth. The water depth is maintained at 1.7m or more, and a 2.2-kilowatt impeller-type aerator is provided in the pool. 10 days before the release of the fish species, Qingtao was splashed with tea bran 30-40 kg/mu.
2. Fish stocking and matching. The fish stocking principle is "high-density, large-scale, and early spring competition." By the end of March, the temperature of water began to rise, and the stocks of winter-feeding species were quickly stocked. A total of 5,500 Ao tilapia fish stocks were stocked at 142 g, and 7,000 Ao tilapia fishes at 93 g were stocked. 60 g of freshwater oysters, 800 tails, 120 g of salmon, 180 squid, 36 g of Baihuaqing, and 100 g of 10 g of squid, and the fish once put enough, with an average density of 4,600 tails/mu.
3. Feeding management.
(l) Cluster domestication. The conditioned reflex signals of fish feeding were established by sound. After a certain degree of domestication, the fish began to gather food on the cluster and set up a fixed food field within 20 meters of Shangtoutoutang.
(2) Feeding. The starting temperature for the growth of A. tilapia was 16°C, and the fishes were fed on the second day of the pond, so that they could start early feeding, early feeding, and late feeding, extending the growth period of the fish. In the feeding process, we insist on hand-spreading, with the principle of “slow, fast, slow, less, more, and lessâ€, properly expand the feeding range to ensure that the fish can feed the feed and feed it twice a day, 9:00-10:00 am 4:00-5:00 PM.
(3) Daily feed amount. The amount of feed should be appropriately increased or decreased according to changes in water temperature, weather conditions, and predation by fish. Generally, in March, the water temperature is low, and the daily feed amount accounts for 2% of the fish's body weight. From April to June, the water temperature is most suitable for fish growth. The amount of feed accounts for 6% of the fish's body weight. From July to September, during the high temperature season, the daily feed amount accounts for 4% of the fish's body weight. It maintains fish populations becoming full, with hunger and appetite craving; from October to December, autumn cool, the water temperature drops, The feed amount is 5% of the fish's body weight.
(4) Fish disease control. Adhere to the principle of "prevention first, prevention and control both." Before stocking, fingerlings are soaked with 30ppm potassium permanganate solution for 15 minutes to disinfect the fish. From April to September, it is a fish disease-prone season. Every 15 days, bleaching powder lppm or quicklime 20kg/mu Quanchiposa. . No major fish disease occurred in the breeding process.
(5) Water quality and dissolved oxygen. The pond can make use of the tide of the Pearl River Estuary. Small water changes are performed every day, and two large tides are changed every month. In May, the water quality improvement agent produced by the company is used to maintain good water quality. In April-September, use oxygen machine to increase dissolved oxygen, normal weather, 4:00-8:00 in the morning boot; hot or weather changes, 7:00 pm morning 8:00 boot.
4. Fishing listing. According to the large-scale and high-priced market characteristics of A. tilapia, we have controlled the market size of A. tilapia at 0.46-0.75 kg/silo to achieve better economic benefits. On July 8th, they began to arrest and arrested Daliuxiao. Until last March 18th in Qiantang, except for some tilapia that died in early February, they received a total of 5,586 kg of A. tilapia and 390 kg of freshwater fish.é³™ 315 kilograms, 243 kilograms of flowers and 196 kilograms of river urns, totaling 6,730 kilograms. The average price of A. tilapia is 13 yuan/kg.
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