At present, some of the sturgeon species have come into the vision of consumers of all classes in Guangdong, but also become the majority of farmers, aquaculturists to adjust the breeding varieties, the following is the sturgeon rearing methods that I have carefully organized for you to take a look.

Sturgeon rearing methods

First, the net box set specifications 5 meters?5 meters, 4 meters?4 meters, mesh coat is a polyethylene structure, mesh size depending on the specifications of the stocked sturgeon species, in order not to escape the fish and conducive to the exchange of the water body and the bottom mesh does not leak bait as a principle, the net box set up should be selected for the quality of the water

Sturgeon

conditions are good depth of water more than 8 meters away from the place, and also There should also be micro-current, wind, sun and water surface width and other conditions. Large reservoirs should choose a suitable bay to set the net box, small reservoirs should choose not far from the dam to set.

Second, seed stocking in mid-April to set up the net box, netting soaked by the reservoir has no roughness to reduce the fish species into the box due to the change in the environment of the panic scurrying, and thus the chance of being netting bruises. Stocking time in mid to late April is appropriate, the water temperature of about 10-15 ℃, is suitable for the best growth temperature of sturgeon. Stocking specifications the larger the better, generally 75-150 grams per tail, stocking density is 40-50 tails / square meter. Fish species into the box before the use of 3% -4% of the salt water disinfection, transport water and reservoir water temperature difference of not more than 5 ℃.

Third, feed feeding can be used with artificial granular material, the requirements of the protein content of 42% -45%, the main raw materials are fishmeal, yeast, blood meal, wheat, corn, silkworm pupae, etc., granular material in the water should be high stability, to maintain more than half an hour. Fish species into the box should stop baiting for 2-3 days, so that the fish species to adapt to the environment, 2-3 days after the start of the bait, just feeding need to be a small amount of times, for baiting. The size of the bait should be adjusted with the increase of the fish body in order to achieve the appropriate taste. Every day in the morning and evening baiting once, sturgeon have night feeding habits, night feeding once, the daily bait for the box fish weight of 2% -4%, while the amount of bait should be based on the weather and water temperature and fish feeding situation.

Fourth, the daily management should be arranged to guard, adhere to the morning, noon and night patrol box check. An hour after each feeding of fish to lift the box to check the feeding situation, adjust the amount of bait; found that the box has a floating dead fish should also lift the box to check and fish out of the box of sick fish dead fish. Every 10 days or so to clean the net box, remove the debris on the net coat and excessive algae attached to keep the box inside and outside the water exchange unimpeded, with the growth of fish to adjust the density in a timely manner. Replacement of the net once a month, the replacement of the set method, that is, first of all, to be replaced into the net after 2-3 days of soaking it set it in the sturgeon to be replaced out of the outside of the net box containing sturgeon, and fixed, and then carefully to be replaced out of the net box unlocked and pulled out of the water. Rinse and repair the exchanged net for replacement. Note that if you enter the high-temperature season, you should try to avoid dumping fish, so as not to cause losses.

V. Fish disease control net box before the water with quicklime or bleach immersion treatment, 7-10 days in advance underwater, before the fish species into the box with 3% -4% of the salt water immersion 10-15 minutes, every 15-20 days per box with quicklime 2-3 kilograms of water splash box and the waters near the body of the water, once a day for three consecutive days, and at the same time, in the four corners of the net box with bleach and trichlorfon interspersed with hanging bag ( Master the concentration of bleach hanging bags). Lift the corners of the net box when disinfecting, reduce the water body, increase the concentration of drugs, observe the stress reaction, to appear when the stress put down the four corners. Pond culture Sturgeon is a large fish, its growth rate is fast, disease resistance and adaptability, in the pond culture should

pay attention to some of the following issues.

First, the conditions of the pond sturgeon aquaculture pond requires a larger area, deeper water, sufficient water, water quality fresh and pollution-free areas, convenient transportation and communication facilities are available. Pond area of 5-10 acres is appropriate, the water depth of 2-3 meters, the water quality is more stable, the water body has a high value of dissolved oxygen, preferably more than 5 mg / liter. The pond should have independent inlet and outlet, slope drop, equipped with a water truck type oxygenator, and set up a feed table.

Second, pond disinfection half a month before the release of seedlings, the pond into the water 15-20 cm, with 100-150 kg / mu of quicklime to the water after the whole pond sprinkled to eliminate harmful organisms in the water; pond soaking 3-4 days after the pond water out of the pool, and then into the water to soak the bottom of the pond, the inlet with a 60 mesh sieve silk filtration; 15-20 kg / mu of tea cake pond disinfection, disinfection of the tea before the cake Broken and soaked in water for 1 day, the whole pond sprinkled, can kill the pond fish, shrimp and fish and shrimp eggs, after clearing the pond after the tea bran to stay in the pool to do fertilizer. 10 days before the release of seedlings, pond water to 70-80 cm deep, and then disinfected with chlorine disinfectant.

Third, cultivate plankton 7-8 days before the release of seedlings, in accordance with the preparation of 50 kilograms of dry chicken manure per acre of pond, and chicken manure soaked for 2 days, it is best to use chlorine disinfectant disinfection, and then remove the debris (filtering), the whole pond sprinkled. Filtered material with a fiber bag wrapped, put in the pond downwind, continue to do the culture of plankton fertilizer.

Fourth, seed stocking selection of healthy disease-free sturgeon fry, body length of 20 cm or more is good. The general stocking density of large-size fry is 400-600 tails/mu. The time of stocking should be considered both the water temperature is suitable, but also to consider the adult fish on the market. Fry should stop feeding 1-2 days before transportation, and use 38?82 polyethylene bags for transportation, add 3/5 water in the bag and adjust the water temperature to 12-15℃ with ice, put 20 fry with body length of 20-30cm into each bag, and pack them for transportation. If the transportation time is within 8 hours, it can be transported by water truck, but always pay attention to the change of water temperature during transportation, which is also effective. You should test the water 2 days before releasing the fry, and put about 10 fry with the same specification into the net box, and observe the sturgeon's activities, if there is no abnormality, you can release the fry. Normal release of seedlings, do not first arrive in the seedling bag unlocked, should be full bag into the pond, slowly make the bag water temperature and pond water temperature close to the bag, and then open the mouth of the bag will be placed in the pond. Conditions of the farm, it is best to even fish with water poured into a large barrel to maintain continuous inflation, and then put salt in the barrel, so that the salinity of 2%, bathing fish body 10 minutes after the release of seedlings into the pond.

Fifth, feed feeding pond culture to feed mainly with feed, sturgeon fry just down the pond, has not formed a habit of feeding in a fixed location, to be domesticated in a timely manner.

The feed can be put on the feed table to improve the utilization of feed, but also to facilitate daily observation. Some sturgeon, such as sturgeon, hybrid sturgeon, Russian sturgeon, Chinese sturgeon, etc. have the characteristics of light at night, night domestication can be near the feed table place to be illuminated. Feeding should adhere to the principle of small amount of meals, feed should be palatable, the particle size can not be too large or too small, generally 1/2 of the fish's mouth cleft is good. Feeding amount of about 3% of the body weight of the fish, feeding 3-4 times a day, depending on the specific circumstances at any time to adjust the amount of feeding.

Sixth, daily management of pond patrol and growth observation. Every day in the morning, in the evening, a pond patrol, especially at night and early morning pond patrol, pay attention to observe the activities of the fish, to prevent hypoxia; summer rainy season when the air pressure is low, to be diligent in the pond, found that the problem in a timely manner to take the measures to open the oxygenator or fill new water to prevent flooding of the pond. Regularly check the growth and health of sturgeon, timely adjustment of feeding rate and stocking density, when the growth of sturgeon in the pond is too large a difference, according to its specifications in time to split the pond. In water quality management, measure the water temperature three times a day, pH, dissolved oxygen, nitrite, ammonia nitrogen and other physical and chemical factors should be measured regularly. It is worth noting that: sturgeon is a typical benthic fish, generally will not float and swim, some species such as Chinese sturgeon, even in the water body when the dissolved oxygen is insufficient, but also not as obvious as the head of domestic fish, so in special circumstances, such as the water temperature is too high, the color of the water is not right or the weather is hot and muggy, we must strengthen the monitoring of the water quality, the water body early in the morning every day to determine the dissolved oxygen. When the pond water color is too thick, the water transparency is less than 25 cm or the dissolved oxygen is less than 5 mg/liter, the pond should be refilled with new water to keep the water quality fresh. The most suitable pH for sturgeon growth is 6.5-8.0. Too low a pH will affect the metabolic activities and growth of sturgeon, and even jeopardize their lives. The upper temperature limit for most sturgeon to survive is 32℃, and water temperature over 30℃ is dangerous for sturgeon growth. Water temperature control can refer to the following measures: choose the appropriate stocking time, put large-size fish species, in order to shorten the breeding cycle; strive to put large-size fish species after the high temperature period each year, before the arrival of the high temperature period in the following year to reach the specifications of the raised market, you can avoid the high temperature; in the arrival of the high temperature period to deepen the water level, reduce the stocking density; under the conditions of the place can also be taken to increase the amount of water exchange and trellis shading and other measures.

VII, disease prevention and control of fungal diseases is the symptom of slow action, fish body wasting, not feeding. Prevention and treatment method is to prevent fish body injury, the sick fish can be used to clotrimazole and 1% salt and baking soda water mixed solution soak the affected fish for about 10 minutes.

Sturgeon breeding notes

First, the pond conditions sturgeon breeding pond requires a larger area, deeper pond water, sufficient water, water quality fresh and pollution-free areas, convenient transportation and communication facilities are available. Pond area of 5-10 acres is appropriate, the water depth of 2-3 meters, the water quality is more stable, the value of dissolved oxygen in the water body is high, preferably more than 5 mg / liter. The pond should have independent inlet and outlet, slope drop, equipped with a water truck type oxygenator, and set up a feed table.

Second, pond disinfection half a month before the release of seedlings, the pond into the water 15-20 cm, with 100-150 kg / mu of quicklime to the water after the whole pond sprinkled to eliminate harmful organisms in the water; pond soaking 3-4 days after the pond water out of the pool, and then into the water to soak the bottom of the pond, the inlet with a 60 mesh sieve silk filtration; 15-20 kg / mu of tea cake pond disinfection, disinfection of the tea before the cake Broken and soaked in water for 1 day, the whole pond sprinkled, can kill the pond fish, shrimp and fish and shrimp eggs, after clearing the pond after the tea bran to stay in the pool to do fertilizer. 10 days before the release of seedlings, pond water to 70-80 cm deep, and then disinfected with chlorine disinfectant.

Third, cultivate plankton 7-8 days before the release of seedlings, in accordance with the preparation of 50 kilograms of dry chicken manure per acre of pond, and chicken manure soaked for 2 days, it is best to use chlorine disinfectant disinfection, and then remove the debris (filtering), the whole pond sprinkled. Filtered material with a fiber bag wrapped, put in the pond downwind, continue to do the culture of plankton fertilizer.

Fourth, seed stocking selection of healthy disease-free sturgeon fry, body length of 20 cm or more is good. The general stocking density of large-size fry is 400-600 tails/mu. The time of stocking should be considered both the water temperature is suitable, but also to consider the adult fish on the market. Fry should stop feeding 1-2 days before transportation, and use 38?82 polyethylene bags for transportation, add 3/5 water in the bag and adjust the water temperature to 12-15℃ with ice, put 20 fry with body length of 20-30cm into each bag, and then transport them after packing. If the transportation time is within 8 hours, it can be transported by water truck, but always pay attention to the change of water temperature during transportation, which is also very effective. You should test the water 2 days before releasing the fry, and put about 10 fry with the same specification into the net box, and observe the sturgeon's activities, if there is no abnormality, you can release the fry. Normal release of seedlings, do not first arrive in the seedling bag unlocked, should be full bag into the pond, slowly make the bag water temperature and pond water temperature close to the bag, and then open the mouth of the bag will be placed in the pond. Conditions of the farm, it is best to even fish with water poured into a large barrel to maintain continuous inflation, and then put salt in the barrel, so that the salinity of 2%, bathing fish body 10 minutes after the release of seedlings into the pond.

Fifth, feed feeding pond culture to feed mainly with feed, sturgeon fry just down the pond, has not yet formed a habit of feeding in a fixed location, to be domesticated in a timely manner. The feed can be put on the feed table to improve the utilization of feed, but also to facilitate daily observation. Some sturgeon, such as sturgeon, hybrid sturgeon, Russian sturgeon, Chinese sturgeon, etc. have the characteristics of light at night, night domestication can be near the feed table place to be illuminated. Feeding should adhere to the principle of small amount of meals, feed should be palatable, the particle size can not be too large or too small, generally 1/2 of the fish's mouth cleft is good. Feeding amount of about 3% of the body weight of the fish, feeding 3-4 times a day, depending on the specific circumstances at any time to adjust the amount of feeding.

Sixth, daily management of pond patrol and growth observation. Every day in the morning, in the evening, a pond patrol, especially at night and early morning pond patrol, pay attention to observe the activities of the fish, to prevent hypoxia; summer rainy season when the air pressure is low, to be diligent in the pond, found that the problem in a timely manner to take the measures to open the oxygenator or fill new water to prevent flooding of the ponds. Regularly check the growth and health of sturgeon, timely adjustment of feeding rate and stocking density, when the growth of sturgeon in the pond is too large a difference, according to its specifications in time to split the pond. In water quality management, measure the water temperature three times a day, pH, dissolved oxygen, nitrite, ammonia nitrogen and other physical and chemical factors should be measured regularly. It is worth noting that: sturgeon is a typical benthic fish, generally will not float and swim, some species such as Chinese sturgeon, even in the water body when the dissolved oxygen is insufficient, but also not as obvious as the head of domestic fish, so in special circumstances, such as the water temperature is too high, the color of the water is not right or the weather is hot and muggy, we must strengthen the monitoring of the water quality, the water body should be measured early in the morning every day to determine the dissolved oxygen. When the pond water color is too thick, the water transparency is less than 25 cm or the dissolved oxygen is less than 5 mg/liter, the pond should be refilled with new water to keep the water quality fresh. The most suitable pH for sturgeon growth is 6.5-8.0. Too low a pH will affect the metabolic activities and growth of sturgeon, and even jeopardize their lives. The upper temperature limit for most sturgeon to survive is 32℃, and water temperature over 30℃ is dangerous for sturgeon growth. Water temperature control can refer to the following measures: choose the appropriate stocking time, put large-size fish species, in order to shorten the breeding cycle; strive to put large-size fish species after the high temperature period each year, before the arrival of the high temperature period in the following year to reach the specifications of the raising market, you can avoid high temperatures; in the arrival of the high temperature period to deepen the water level, reduce the stocking density; under the conditions of the place can also be taken to increase the amount of water exchange and trellis shading and other measures.

VII, disease prevention and control of fungal diseases is the symptom of slow action, fish body wasting, not feeding. Prevention and treatment method is to prevent fish body injury, the sick fish can be used to clotrimazole and 1% salt and baking soda water mixed solution soak the affected fish for about 10 minutes.