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High-yield sturgeon farming techniques

Sturgeon is a cold-water fish with high economic and nutritional value that has been tested in Vietnam since 2005 and has been grown in farming in mountainous areas with low water temperatures below the sea level. two forms of farming for meat and eggs. In our country, two species of Siberian sturgeon and Chinese sturgeon are commonly raised. Are you looking to learn more about sturgeon farming techniques? The content of the article below will help you get more useful information on this topic.

Sturgeon farming brings high economic efficiency and is implemented by many farmers
Sturgeon farming brings high economic efficiency and is implemented by many farmers

Prepare ponds and tanks

Ponds were drained, dredged, dredged, repaired pond banks, filled all holes in the legs and banks, drained ponds, cleared the pond banks, cleaned weeds.

Sprinkle lime with the dosage depending on the soil pH as follows:

+ For pond conditions in areas with high pH, ​​it is recommended to apply 5-7kg of lime/100m2, dry the bottom for 3-5 days to let the lime decompose the waste at the bottom, then drain the water and soak for 2-3 days. pump out.

+ For ponds with low pH or newly dug ponds, it is necessary to apply lime from 10 to 15kg/100m2, then take water in, soak for 2-3 days and then pump alum acid out of the pond. Do this continuously 1-2 times until the medium has a stable pH above 6.5.

+ For ponds with neutral bottom pH after treatment, it is not necessary to wash the water, wash with lime water, but get new water into the pond immediately.

The tank does not leak, the water system continuously flows to ensure the dissolved oxygen content is always > 5 mg/l.

The new culture tank is treated with cement, the old tank needs to be cleaned and disinfected using chlorine, iodine or potassium permanganate before raising the new crop.

The sturgeon aquarium needs to be treated cleanly, creating the best conditions for the fish to grow
The sturgeon aquarium needs to be treated cleanly, creating the best conditions for the fish to grow

Fish fingerlings and stocking

The quality of fingerlings is one of the decisive factors for the success or failure of the culture. It is recommended to choose fingerlings with size 50-100g/fish, body length about 15-20cm, uniform, healthy and not deformed. When dropped into the water tank, they swim evenly in the pot, not focusing on one place, the fish is healthy

The appropriate time for stocking is March every year (for Northern provinces) when the water temperature is stable in the range of 18-26oC.

Stocking density: 2-3 kg/m3

Pond culture: 1.5-3 kg/m3

In the process of rearing, when the fish is large, it is necessary to thin it out to avoid reducing the growth rate of the fish.

In both types, the density depends on the size and the amount of dissolved oxygen naturally in the water, can reach 30kg/m3.

Food and feeding

Homemade food must not contain banned substances according to the decision No. 07/2005/QD-BTS dated February 24, 2005 of the Minister of Fisheries (now the Ministry of Agriculture and Rural Development)

The fish feeding regime (the amount of food and the number of feedings) depends on the water temperature. When the water temperature is cold, fish are fed 1-2 times/day, while in warm weather, fish are fed 4 times/day.

Management of farming environment

Sturgeon is a benthic species but requires a clean and oxygen-rich environment. Therefore, in any form of farming, farmers should always monitor and check the water environment regularly to ensure good growth of fish.

+ Measure oxygen, temperature twice a day at 8.00 am and 16.00 pm. When the oxygen content is <4mg/l, aeration is required.

+ Measure pH, NH3 daily to ensure that the indicators are within the allowable range for growth with fish.

Record daily diary: environmental factors, feed, and technical measures taken.

Check the growth rate of fish every 20 days to adjust the diet for the next period

People need to regularly check the quality of fish farming water to ensure the most favorable living environment
People need to regularly check the quality of fish farming water to ensure the most favorable living environment
  • With the form of raising ponds and tanks

+ It is necessary to adjust and maintain the water flow continuously during the day, to ensure that the amount of water exchanged through the tank meets the above criteria.

+ Daily siphoning of leftovers and fish feces.

Some common diseases and how to prevent them

  • Diseases caused by a fungus

Signs of disease: disease occurs when fish is scratched by transportation. Infected fish shows slow swimming, poor appetite, and a white film covering the scratch.

How to prevent and treat diseases: Be gentle when transporting fish. Bathe fish with salt water for 20-30 minutes for 10-15 minutes. Stocking fish at the right density, the fish size is uniform.

  • Intestinal diseases caused by bacteria

Signs of disease: fish swimming lethargic, not eating, belly distended, anus red and swollen. There is yellow discharge from the anus when gently pressing the fish’s belly.

How to prevent and treat diseases: disinfect pond water and culture tanks with TCCA 90% at a dose of 25 ppm.

Signs of disease: Fish mouth, gills and gill cavities, anus, fin base are red and swollen, big head, thin body, fish skin turns gray, fish is disoriented.

How to prevent and treat disease: Isolate sick fish immediately. Let the sick fish bathe in salt water for 20-30 minutes until the fish lice fall to the bottom of the tank/pot.

  • Irridovirus disease

Signs of disease: Infected fish tend to lose weight and eat because the sensory epithelium in the olfactory organs of the fish is infected. The gills of infected fish appear swollen and pale in color compared to the gills of normal fish. Close examination reveals distinct areas of necrosis.

How to prevent and treat the disease: Currently, there is no effective method to control and prevent this disease because there is currently no method to detect disease-causing viruses in broodstock.

Harvest

After the culture period from 14-16 months, the fingerling size 20 fish/kg fish weight 1.6-2 kg/fish, then proceed to harvest. It is possible to collect large fish, continue to raise small fish or harvest the entire pond.

Sturgeon after 16 months of farming can be harvested
Sturgeon after 16 months of farming can be harvested

With the information we share in this article. Hopefully, people can design and build a suitable sturgeon farming model to bring the highest productivity for themselves. Happy successful people.

Emilia Chaney
Emilia Chaneyhttps://agrisearch.net
My name is Emilia Chaney. I'm a social girl from Romania with a big smile and 3 passions: Agriculture, Travel and Social Media. I try to make this blog practical, full of great advice and inspiring ideas.

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