Russian catfish are mainly distributed in the Caspian Sea, Azov Sea, Black Sea and rivers that communicate with them. In the early 90s of the 20th century, China was introduced into China. Breeders of our province also used Russian catfish as breeding objects. As it is a new species of freshwater fish, some farmers still have technical deficiencies in the breeding process. They hope to learn new knowledge and increase the income of breeding. For this purpose, the author specially visited Yang Zhuangzhi, the head of Chengdu Aquatic Technology Promotion Station, and asked him to explain the relevant technologies.
The natural conditions of our province are more suitable for the breeding of elite fish species, including salmon. Carp is a sub-cold water fish, and its water quality is very strict. It requires completely pollution-free breeding. There are many varieties of squid. At present, the main species cultivated in our province is Russian squid. Farming squid technology must pass, not only to good water quality, but also rich food.
Basic conditions
Water Quality Requirements The quality of aquaculture pond water directly affects the growth and development of pond fish, and the Russian monk is no exception. The water quality index of carp is mainly dissolved oxygen and temperature, and the optimum temperature for its growth is 18-25 degrees. At the same time, carp is also a fish with high dissolved oxygen. The suitable content of dissolved oxygen is required to be above 6 mg/l. Deaths below 1.5 mg/l occur.
The Pond Condition The pond area is suitable for 0.2-0.33 hectares. The water depth is about 2 meters. The water quality is fresh and the drainage is convenient. Taking into account its special requirements for water quality, it is better to use ponds with groundwater that can often be injected. In order to prevent the entry of other wild fry, the water inlet is generally to be blocked.
Seed cultivation
To cultivate fish ponds, ordinary cement ponds can be used outdoors. The area of ​​single ponds is about 300 square meters and the water depth is 1.5-2 meters. It is best to use well water that meets the water quality standards of the fishery. Clear ponds and disinfection of ponds before cultivation.
Stocking specifications Stocking fish is 18-30 cm in length and 50-90 grams in weight. The specifications for stocking in the same pond should be neat, uniform in size, and fry with different specifications should be kept in separate ponds. Stocking density is 0.5-1.0 per square meter. Fish were soaked in 5% salt water for 20 minutes before entering the pool and fed on the second day after entering the pool.
In the early stage of feeding, baits can be domesticated in the early stage, and artificial feeds are gradually added. The contents of artificial compound feed were: crude protein 37.82%, crude fat 5.96%, crude fiber 8.48%, ash 14.91%, nitrogen-free extract 20.55%, moisture 12.28%, and particle size 2.0-3.0 mm. Keep the water level above 1.5 meters during the breeding period, water temperature below 26 degrees, dissolved oxygen 6 milligrams per liter.
Seed stocking
Clear pond disinfection 10 days before stocking, use quicklime to clear the pond, 300-400 kg per mu, kill wild fish, bacteria and pests. Before stocking, the seedlings must also be bathed with 5% salt solution for 20 minutes and then placed in the fish pond. The fish should be fed the next day.
Young juvenile juvenile larvae already have the basic characteristics of adult juveniles at the age of 2 months, so the general stocking specification for stocking seedlings specifications is about 30 grams per tail, and the stocking density is 1000-1200 tails per acre. The pond raises Russian crickets. In order to make effective use of the water body, maggots and squid can be properly picked up. Because quail and squid are upper layers of fish and Russia is the bottom layer of fish, their activities are not affected. In addition, squid and squid can also eat plankton, purifying the water quality of the pond. With the proportion: Each mu of water can take advantage of crickets, dip summer 4500.
The natural conditions of our province are more suitable for the breeding of elite fish species, including salmon. Carp is a sub-cold water fish, and its water quality is very strict. It requires completely pollution-free breeding. There are many varieties of squid. At present, the main species cultivated in our province is Russian squid. Farming squid technology must pass, not only to good water quality, but also rich food.
Basic conditions
Water Quality Requirements The quality of aquaculture pond water directly affects the growth and development of pond fish, and the Russian monk is no exception. The water quality index of carp is mainly dissolved oxygen and temperature, and the optimum temperature for its growth is 18-25 degrees. At the same time, carp is also a fish with high dissolved oxygen. The suitable content of dissolved oxygen is required to be above 6 mg/l. Deaths below 1.5 mg/l occur.
The Pond Condition The pond area is suitable for 0.2-0.33 hectares. The water depth is about 2 meters. The water quality is fresh and the drainage is convenient. Taking into account its special requirements for water quality, it is better to use ponds with groundwater that can often be injected. In order to prevent the entry of other wild fry, the water inlet is generally to be blocked.
Seed cultivation
To cultivate fish ponds, ordinary cement ponds can be used outdoors. The area of ​​single ponds is about 300 square meters and the water depth is 1.5-2 meters. It is best to use well water that meets the water quality standards of the fishery. Clear ponds and disinfection of ponds before cultivation.
Stocking specifications Stocking fish is 18-30 cm in length and 50-90 grams in weight. The specifications for stocking in the same pond should be neat, uniform in size, and fry with different specifications should be kept in separate ponds. Stocking density is 0.5-1.0 per square meter. Fish were soaked in 5% salt water for 20 minutes before entering the pool and fed on the second day after entering the pool.
In the early stage of feeding, baits can be domesticated in the early stage, and artificial feeds are gradually added. The contents of artificial compound feed were: crude protein 37.82%, crude fat 5.96%, crude fiber 8.48%, ash 14.91%, nitrogen-free extract 20.55%, moisture 12.28%, and particle size 2.0-3.0 mm. Keep the water level above 1.5 meters during the breeding period, water temperature below 26 degrees, dissolved oxygen 6 milligrams per liter.
Seed stocking
Clear pond disinfection 10 days before stocking, use quicklime to clear the pond, 300-400 kg per mu, kill wild fish, bacteria and pests. Before stocking, the seedlings must also be bathed with 5% salt solution for 20 minutes and then placed in the fish pond. The fish should be fed the next day.
Young juvenile juvenile larvae already have the basic characteristics of adult juveniles at the age of 2 months, so the general stocking specification for stocking seedlings specifications is about 30 grams per tail, and the stocking density is 1000-1200 tails per acre. The pond raises Russian crickets. In order to make effective use of the water body, maggots and squid can be properly picked up. Because quail and squid are upper layers of fish and Russia is the bottom layer of fish, their activities are not affected. In addition, squid and squid can also eat plankton, purifying the water quality of the pond. With the proportion: Each mu of water can take advantage of crickets, dip summer 4500.
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