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Freshwater fish pond cultivation of barracuda fish species
The author's unit conducted the cultivation of barracuda fingerlings in 2004. The breeding area was 30 mu, and a total of 100,000 tailed barracuda summer flowers were released. The author selected one of the three acres of fish ponds for barracuda fish breeding experiments, and now will briefly introduce the test situation. The pond is prepared to be a three-acre fish pond with convenient drainage and drainage. It is close to the water source of the Yangtze River. The water is fresh, and the dissolved oxygen is sufficient without pollution. Before the fish pond was dredged and deep, the bottom of the pond was about 5cm thick. The slopes of the pond are flat and free of weeds. There are black plastic plates with a height of about 50cm around them to prevent the entry of predators such as snakes, rats, frogs, and crickets. About one month before the barracuda summer flower enters the pool, the water injection into the pool is about 1.5m high (average water level), and the calcined pulp is used for pouring heat, the drug concentration is 25ppm, and the barracuda summer flower enters the pool 10 days before. Approximately 150 kg of decomposed organic fertilizer that had been decomposed and bleached was used to incubate the plankton in the pond. The barracuda summer flower transport and stocking has been reduced by the purchase of barracuda summer flowers, about 1.5 to 3 cm in length, and transported by double-layer nylon bags with water. 2500 tails of summer fish per bag. At the same time, 800,000 units of dissolved penicillin were poured into each bag to disinfect the fry and improve the survival rate of transportation. After 8 hours of long-distance transportation, barracuda summer flowers arrived in Tangkou. It has been observed that the survival rate of transportation is above 98%. Put the four bags of fry's nylon bag (without bag opening) into the pool water to buffer the temperature difference between the water in the nylon bag and the pool water. After a quarter of an hour, untie the bag and pour the fry slowly into the pool water. . The summer stocking density is about 3300 tails/mu. Water quality management Barracuda fish species cultivation, water quality without excessive fat, and strive to live cool. From the summer of June 10th to the pond, fresh water 20cm was poured into the pool every half a month. The water color in the pool is light green, the transparency is between 25cm and 30cm, and the pH of the pool water is between 7.5 and 8.5. The feed was fed from June to August to feed Tongwei Brand 8813 broken fish feed, which was fed three times a day, once in the morning, midnight and evening, and the feed rate was about 6~10%. From September to October, Tongwei Brand 103 fish feed (particle size is about 2mm) was fed twice a day, sooner or later, and the feed rate was about 4% to 8%. When it is rainy or when the weather is hot, feed less or not. The specific feeding time should also be adjusted according to the weather conditions and the water temperature. Disease Prevention Barracuda As a seawater species in aquaculture, there are not too many diseases, and the focus is on prevention. The pool I tried to test only had a splash of quicklime on July 16th and September 10th, with drug concentrations of 25ppm. Routine management insisted on two rounds of patrol the pond twice a day to observe the status of fry activities, feeding conditions, whether there is any disease, and to make timely response measures. In summer, when the water temperature is higher than 30°C, a water pump is used to circulate flush water in the pool for one hour. Clean up the pool of debris and predators. The test results were measured at the end of October. A total of 365 kg of barracuda were collected, with an average of 121.7 kg per mu, and the survival rate of the culture was 82%. The bait coefficient was approximately 1.6. The average length of the barracuda species was measured. It is 18cm and the average tail weight is 45g. Economic Analysis Barracuda, a species of seawater, is currently sold at a price of 16 to 18 yuan per kilogram, and fish is priced at about 18 to 20 yuan per kilogram. Take the author's fish breeding as an example, the output value per mu is about 2312.3 yuan, the fish fry cost is 198 yuan, the bait cost is 580 yuan, the other cost is 230 yuan, and the net profit is 1304.3 yuan per mu. Barracuda market specifications are not high, 500g or so can be listed, the cultured fish investment recovery cycle is short. Therefore, barracuda is indeed a seawater breeding breed worthy of promotion.