Chinese sturgeon acipenser scnensis Gray, commonly known as Da Lazi, yellow croaker. English name Chinese sturgeon, is China's national first-class protection of animals, is a typical river fish migratory fish, belonging to Bony fish skeleton, limteridae, Polygonaceae, Acarus. It is the largest of the 27 species in the world, and can weigh more than 500 kg. Relatively large females, males generally below 150 kg, mainly distributed in China's East and Yellow Sea continental shelf waters and the mainstream of the Yangtze River, and occasionally into the Tongjiang lakes and tributaries. The squid distributed in the Pearl River is arguably classified as a Chinese sturgeon because of differences in morphological characteristics and ecological habits between the Yangtze River and Chinese sturgeon.
l Biological characteristics
I. 1 Life History
Chinese sturgeons in the Yangtze River usually live in the ocean. Individuals who are about to mature will arrive at the mouth of the Yangtze River from June to August to carry out an advanced reproductive visit. From September to October, they arrived at the reach of the Hubei section of the river and wintered in the middle of the river. From October to November of the following year, they spawned, and returned to the sea immediately after birth to retrieve bait. The produced eggs adhere to the river bottom rock or gravel. Under the conditions of water temperature 17 to 18°C, the membrane hatched 5-6 days and nights, and feeding was started 12-14 days later. The offspring of the progeny that were breeding in the spring of the following year entered the Yangtze River estuary from April to August in the next year from April to August. In September, the young larvae with a body length of 30 cm gradually entered the ocean.
1.2 Phototaxis
It has phototaxis for weak light, but it is afraid of strong light. The larvae have a strong phototaxis, and the phototaxis decreases as the fish grows. The salted fish is completely free of phototaxis. In general, it is only active in the water during the day and rises into the water at night.
1.3 Adaptability to temperature
It is a temperate fish and has a low food intake at 6°C. The individual does not grow much; it grows slowly when it is around 10°C, 18-25°C is a suitable temperature for growth, and the food intake above 28°C decreases, the growth rate slows down, and it exceeds 35°C. There is a danger of death.
1.4 Ability to regulate osmotic pressure
It is a wide-salinity fish that regulates the body's osmotic pressure and adapts to salt changes. As long as it undergoes a gradual adaptation process, it can grow and grow in freshwater, brackish water and seawater.
I. 5 Sensory organs and their capabilities
Eyes with weak vision and only some sensitometric functions did not help in feeding activities. The tongue is the main organ of taste, with a well-developed tactile sense and a keen sense of smell. The olfactory organ is mainly the four short whiskers in front of the mouth, which are used to explore the food in the sediment. Squid can feel the soft, hard, shape, particle size, surface finish, etc., of the feed, and have a love and choice for food.
1.6 Dissolved oxygen
Requires more than 6 mg/L. Below 4 mg/L, the food intake was significantly decreased, the food intake below 3.5 mg/L was stopped, and coma and death occurred around 2.5 mg/L.
1.7 Exercise Behavior
The juveniles and juveniles are not clustered but disperse activities. Only after the larvae have entered benthic life there is a clustering behavior for a short period of time before starting to feed. The total length was more than 6.7 c/n, ie, the food was dispersed and fed until it became mature. Lively and lively, no matter juvenile or adult fish are swimming slowly at the bottom of the pool, the outdoor pool needs shading nets, with aerator. For ease of management and observation, young and young catfish farming ponds should be smaller and lighter.
As the fish grows, the pool area gradually increases and the water depth gradually increases. Aberdeen (just hatched to 5 em or less) Aquaculture pond area is generally less than 10m2, water depth. 5～0.7 m; young pond (1～100 g/tail) 10～30 m2, water depth 0.6～0.8 m; 1～2 years old fish (100～5000 g/tail) pool 30～120 m: The water depth is 0.8 to 1. O m; adult fish (over 5000 g/tail) 120 to 250 m2, water depth 1 to 1.5 m. Black shading nets above the pool. The drainage is generally up and down. The shape of the pool is round, square and rectangular. The round pool is convenient for automatic drainage and management. The bottom of the tank is required to be smooth, with a slope of 2 to 5% on the bottom facing the outfall. Drain outlets are provided with box-shaped or column-shaped fish stopping facilities, and the bottom of the pool is suitable for close to natural colors. With 1 aerator/200mz, keep more than 6ppm dissolved oxygen, more than 50cm in transparency. Breeding density is O. 5 to 1 kg/tail, 30 to 20 tails/m2; 2 to 3 kg/tail, 10 to 5 tails/m2, 4 to 5 kg/tail, 3 to 2 tails/m2.
2.2.2 Earthen pond farming
2 2.2.1 Monoculture
An area of ​​1 to 5 acres can be, water depth 1.5 ~ 2 m. The bottom of the pool is flat, with less silt, water-free grasses, no leakage, sink feed benches along the pool edge, bricks made of cement, bricks, trapezoidal shape, gentle slope shape (it can also use temporary materials to build temporary), slope About 15 to 30. , area 4 ~ 6 m. , Xiaochi l~2, Dachi 3~4. Xiatang fish species have been completely switched to feed, individual uniformity, weight 100 ~ 200g / tail, put the breeding density of 350 ~ 650 tail / acre, the minimum dissolved oxygen in the morning should not be less than 4mg / L, feeding on the positioning, quantity , quality, time. Four times a day, summer water and fertilizer can be used per acre to catch grass carp 500g tail 3 to 5 tail, carp to eat phytoplankton transparency.
2.2.2.2 Couplings Feeding is not carried out. Carps use natural foods such as shrimp and aquatic insects in ponds to grow.
Choose grass-family fish ponds as appropriate, lean water, deep-seated oxygen and small changes in day and night, do not tame compound feed or fish that can not be domesticated and transferred into the pond once, and stocks of 1 to 3 fish per mu of stocking 200 g should. With an aerator, it requires easy injection and drainage. The high-yield ponds, pupa and pontoon ponds of adult fish were used to cultivate plankton due to fertilization. The dissolved oxygen in the ponds varied greatly day and night. The Chinese sturgeon could not adapt. The quail and carp ponds were similar to the clams in competition for food due to the similar diet.
2.3 Cage culture
Net cages can be set up in reservoirs, rivers, and other water areas with good water quality and no pollution, and the water depth should be greater than 5 m. Fish cages of 50-500 g/tail were used with cages of 20 rTl2, and cages of 500 g/fig. or larger were used with cages of 60 m2. The size of the net depends on the size of the species and it is appropriate to avoid fish. It is better to use two layers of cages. The depth of cages entering the water is generally 2 m. When the water temperature is high from July to August, it can reach 3 m. There are bait stations in the cages. It is generally based on monoculture, but it can also be used with a few fish and squid to clean the net. It is advisable to put 50 g or more into each finger, preferably about 200 g per tail. When entering the box, the water temperature is 15～16°C, the stocking density is 50～100g/tailed seedlings, 30～20 tails/carton, 100～500g/tailings, 20～15 tails/carton, 500～1000g/tails. Put 15 to 10 tails/carton, put 1,000 to 2000 g/tail on 8 to 5 tails/carton. Because of the sharpness of the Chinese iliac plate, frequent swimming and high oxygen consumption, the use of water is mainly planar, and its density should be lower than other species.
Feeding and management: a small number of times, the daily vote 6 times, inconvenient to vote 3 to 4 times, feeding rate is generally 3 to 4% of body weight, and according to the growth of fish, feeding, water temperature adjustment. Check and clean the algae and dirt attached to the inside and outside of the cage regularly, and flush the cage at least once every two months. Change direction of movement. When it was scared, it accelerated and even pulled out of the water.
1.8 Food habits
It is a moderately meaty fish that feed on benthic animals. Under natural conditions, juvenile fishes are bred by aquatic oligochaites, aquatic insect larvae, and leeches. The rivers from the lower reaches of the Yangtze River to the first invertebrate are mainly shrimps and crabs, and they enter the first year of estuarine waters in estuaries. Fish (Aphids, Tongue, Goby, Anchovy, etc.), Nereis, and shrimps are the main species, and fish and clams are also eaten. In the sea, the main food for salmon is fish, crabs, and shellfish, with the largest number of benthic fish and crabs. The broodstock has a strong ability to fight hunger. It completely stops feeding on the way to upstream rivers. The cub's hunger-resistance time can be up to 15 days, but it is more than 6% of the body weight when gluttonous and satiation. Artificially cultivated Chinese sturgeon may be domesticated to feed artificial compound feed.
1.9 Growth rate
Chinese sturgeon has the characteristics of large individuals, long life cycle, fast growth, and late sexual maturity. Under natural conditions, the average body length of the first-instar fish is 57cm and the weight is 1.5kg; the average age of the 2nd-age fish is 75cm and the weight is 3.5kg; the average body length of the 3rd-instar fish is 9lcm and the average body weight is 6.4kg; The body length is 106cm and the average body weight is 10kg. The average age of the 5th instar is 120cm and the average body weight is 15kg. It grows more rapidly under artificial culture. At a water temperature of 14-29C, the average body weight of 11-month-old fish species reaches 3.5kg, and the average body weight of 14-month-old fish species reaches 5kg.
1.10 Breeding habits
After the broodstock crossed the river in July and August to swim in freshwater and stay for one year, they lay eggs in the fall of October to January. The females usually have sexual maturity of 14 years old and the smallest mature individuals have a body length of 213.239 cm. The body weight is 12-148 kg and the average egg production is 640,000. Male sexual maturity age is the earliest 9 years, the smallest mature individual body length is 169 ~ 17lcm, weight is 38 ~ 50kg. The sex ratio is close to l:1.
2 Adult culture method
2.1 Precautions
1.1 Switch to Food
All kinds of size Chinese sturgeons of 3 to 300g are customarily called salmon species. After raising the seedlings to a length of about 10cm and a fish weight of 3 to 5kg, they can enter the breeding of the inbreeds. The key to this period is the conversion of the feed, that is, the seed from the feeding of fresh food (water The process of transforming waterflies and harvest bugs into foods for feeding. The size of the transferred species is generally 2 to 250 g, and the transfer time is determined based on the amount of live feed and the temperature of the culture water. If the supply of live bait is adequate, it can be reared for more food and the temperature of the water should be 15 to 16°C. There are many types of feeds used for switching feeds. The carp eats soft, smooth and smooth feeds. The soft pellet feeds with full nutrition and good palatability change quickly, and only three days for transfer and acclimation. Most catfishes Can eat normally, the rate of switching is 95%. The use of semi-wet pellet feeds requires 5 to 7 days for food to be fed and 8 to hard pellet feeds.
On the 10th day, the switching rate was 75-95%. Adding a certain amount of blisters to the feed during the transfer period can increase the feed intake of the feed.
Feeding rate
Do not feed when dissolved oxygen falls below 3 mg/L, and fish do not eat. Before the thunderstorm, the weather was low and the weather was sweltering. When the cold wave came, the temperature dropped suddenly without feeding. When the water temperature is 14°C-17°C, the appropriate feeding rate of 3-40g pigtail formula feed is 5% of the body weight. When the water temperature is 13-15°C, the feed rate of 70-140g pups feed is 2% of the body weight. Around, the feed rate of live bait may be 6 to 10%, feeding from 6 to 8 times daily at 7 to 21 hours, and feeding slowly, with a small number of times is appropriate. When the water temperature is lower than 14°C or higher than 28°C, the feeding amount should be reduced. After being cultured to more than 500g, it can be gradually transformed into aquaculture with adult clams or clams or soft-shelled turtles. The feed ratio of compound feed is generally O. 8 to 1.8, natural food is 8 to 15.
Water quality
Carp is more demanding on water quality than other fish. It requires separate and convenient drainage and water supply, sufficient water supply, clean water, and thin water. It meets the requirements for freshwater fishery water quality and requirements for catfish culture in China. The transparency is greater than 50 C/lq, and the dissolved oxygen is greater than 6ppm. An aerator is required.
2.2 Cultivation methods
Cement pond farming
The water temperature is suitable, shading nets are required in outdoor pools and aerators are provided. In order to facilitate management and observation, the ponds for juvenile and young larval fish farming should be smaller and lighter. As the fish grows, the pool area gradually increases and the water depth gradually increases. Aberdeen (just hatched to 5 em or less) Aquaculture pond area is generally less than 10 square meters, depth of water O. 5～0.7m; young duck pond (1～100g/tail) 10～30 square meters, water depth 0.6～0.8m; 1～2 years old fish (100～5000g/tail) pool 30～120 square meters, Water depth 0.8 to 1. Om; adult fish (over 5000 g/tail) 120 to 250 square meters, water depth 1 to 1.5 meters. Black shading nets above the pool. The drainage is generally up and down. The shape of the pool is round, square and rectangular. The round pool is convenient for automatic drainage and management. The bottom of the tank is required to be smooth, with a slope of 2 to 5% on the bottom facing the outfall. Drain outlets are provided with box-shaped or column-shaped fish stopping facilities, and the bottom of the pool is suitable for close to natural colors. With 1 aerator / 200mz, keep more than 6ppm of dissolved oxygen, transparency more than 50cm. Breeding density is O. 5 ~ 1 kg / tail, 30 ~ 20 / square meter; 2 ~ 3 kg / tail is 10 ~ 5 tail / square meter, 4 ~ 5 kg / tail is 3 ~ 2 tail / square meter.
Pond farming
Single-cultivated area of ​​1 to 5 acres can be, water depth 1.5 ~ 2m. The bottom of the pool is flat, with less silt, water-free grasses, no leakage, sink feed benches along the pool edge, bricks made of cement, bricks, trapezoidal shape, gentle slope shape (it can also use temporary materials to build temporary), slope About 15 to 30, with an area of ​​4 to 6 square meters, 1 to 2 ponds and 3 to 4 ponds. Xiatang fish species have been completely switched to feed, individual uniformity, weight 100 ~ 200g / tail, put the breeding density of 350 ~ 650 tail / acre, the minimum dissolved oxygen in the morning should not be less than 4mg / L, feeding on the positioning, quantity , quality, time. Four times daily shooting, summer water and fertilizer can be used per acre to catch grass carp 500 g tail of 3 to 5 tail, carp to eat phytoplankton transparency.
Set up
Without feeding, squid grows using natural foods such as shrimp fish and aquatic insects in ponds. Choose grass-family fish ponds as appropriate, water lean, deep-seated oxygen diurnal changes, do not tame compound feed or after a non-domesticated transfusing fish into the pond, 200 g per acre stocking species of 1 to 3 tail is appropriate . With an aerator, it requires easy injection and drainage. The high-yield ponds, pupa and pontoon ponds of adult fish were used to cultivate plankton due to fertilization. The dissolved oxygen in the ponds varied greatly day and night. The Chinese sturgeon could not adapt. The quail and carp ponds were similar to the clams in competition for food due to the similar diet.
Cage culture Net cages can be set up in reservoirs, rivers, and other waters with good water quality and no pollution, and the water depth should be greater than 5m. Fish cages of 50-500 g/tail are used with cages of 20 rTl2, and large fish species of 500 g/head or more are used with cages of 60 m2. The size of the net depends on the size of the species and it is appropriate to avoid fish. It is better to use two layers of cages and the depth of cages is generally 2m. When the water temperature is high in July to August, it can reach 3m. There are bait stations in the cages. It is generally based on monoculture, but it can also be used with a few fish and squid to clean the net. It is advisable to put 50g or more into each finger, preferably about 200g per tail. When entering the box, the water temperature is 15～16°C, the stocking density is 50～100g/tailed seedlings, 30～20 tails/carton, 100～500g/tailings, 20～15 tails/carton, 500～1000g/tails. Put 15 to 10 tails/carton, put 1,000 to 2000 g/tail on 8 to 5 tails/carton. Because of the sharpness of the Chinese iliac plate, frequent swimming and high oxygen consumption, the use of water is mainly planar, and its density should be lower than other species.
Feeding and management: a small number of times, the daily vote 6 times, inconvenient to vote 3 to 4 times, feeding rate is generally 3 to 4% of body weight, and according to the growth of fish, feeding, water temperature adjustment. Check and clean the algae and dirt attached to the inside and outside of the cage regularly, and flush the cage at least once every two months.
l Biological characteristics
I. 1 Life History
Chinese sturgeons in the Yangtze River usually live in the ocean. Individuals who are about to mature will arrive at the mouth of the Yangtze River from June to August to carry out an advanced reproductive visit. From September to October, they arrived at the reach of the Hubei section of the river and wintered in the middle of the river. From October to November of the following year, they spawned, and returned to the sea immediately after birth to retrieve bait. The produced eggs adhere to the river bottom rock or gravel. Under the conditions of water temperature 17 to 18°C, the membrane hatched 5-6 days and nights, and feeding was started 12-14 days later. The offspring of the progeny that were breeding in the spring of the following year entered the Yangtze River estuary from April to August in the next year from April to August. In September, the young larvae with a body length of 30 cm gradually entered the ocean.
1.2 Phototaxis
It has phototaxis for weak light, but it is afraid of strong light. The larvae have a strong phototaxis, and the phototaxis decreases as the fish grows. The salted fish is completely free of phototaxis. In general, it is only active in the water during the day and rises into the water at night.
1.3 Adaptability to temperature
It is a temperate fish and has a low food intake at 6°C. The individual does not grow much; it grows slowly when it is around 10°C, 18-25°C is a suitable temperature for growth, and the food intake above 28°C decreases, the growth rate slows down, and it exceeds 35°C. There is a danger of death.
1.4 Ability to regulate osmotic pressure
It is a wide-salinity fish that regulates the body's osmotic pressure and adapts to salt changes. As long as it undergoes a gradual adaptation process, it can grow and grow in freshwater, brackish water and seawater.
I. 5 Sensory organs and their capabilities
Eyes with weak vision and only some sensitometric functions did not help in feeding activities. The tongue is the main organ of taste, with a well-developed tactile sense and a keen sense of smell. The olfactory organ is mainly the four short whiskers in front of the mouth, which are used to explore the food in the sediment. Squid can feel the soft, hard, shape, particle size, surface finish, etc., of the feed, and have a love and choice for food.
1.6 Dissolved oxygen
Requires more than 6 mg/L. Below 4 mg/L, the food intake was significantly decreased, the food intake below 3.5 mg/L was stopped, and coma and death occurred around 2.5 mg/L.
1.7 Exercise Behavior
The juveniles and juveniles are not clustered but disperse activities. Only after the larvae have entered benthic life there is a clustering behavior for a short period of time before starting to feed. The total length was more than 6.7 c/n, ie, the food was dispersed and fed until it became mature. Lively and lively, no matter juvenile or adult fish are swimming slowly at the bottom of the pool, the outdoor pool needs shading nets, with aerator. For ease of management and observation, young and young catfish farming ponds should be smaller and lighter.
As the fish grows, the pool area gradually increases and the water depth gradually increases. Aberdeen (just hatched to 5 em or less) Aquaculture pond area is generally less than 10m2, water depth. 5～0.7 m; young pond (1～100 g/tail) 10～30 m2, water depth 0.6～0.8 m; 1～2 years old fish (100～5000 g/tail) pool 30～120 m: The water depth is 0.8 to 1. O m; adult fish (over 5000 g/tail) 120 to 250 m2, water depth 1 to 1.5 m. Black shading nets above the pool. The drainage is generally up and down. The shape of the pool is round, square and rectangular. The round pool is convenient for automatic drainage and management. The bottom of the tank is required to be smooth, with a slope of 2 to 5% on the bottom facing the outfall. Drain outlets are provided with box-shaped or column-shaped fish stopping facilities, and the bottom of the pool is suitable for close to natural colors. With 1 aerator/200mz, keep more than 6ppm dissolved oxygen, more than 50cm in transparency. Breeding density is O. 5 to 1 kg/tail, 30 to 20 tails/m2; 2 to 3 kg/tail, 10 to 5 tails/m2, 4 to 5 kg/tail, 3 to 2 tails/m2.
2.2.2 Earthen pond farming
2 2.2.1 Monoculture
An area of ​​1 to 5 acres can be, water depth 1.5 ~ 2 m. The bottom of the pool is flat, with less silt, water-free grasses, no leakage, sink feed benches along the pool edge, bricks made of cement, bricks, trapezoidal shape, gentle slope shape (it can also use temporary materials to build temporary), slope About 15 to 30. , area 4 ~ 6 m. , Xiaochi l~2, Dachi 3~4. Xiatang fish species have been completely switched to feed, individual uniformity, weight 100 ~ 200g / tail, put the breeding density of 350 ~ 650 tail / acre, the minimum dissolved oxygen in the morning should not be less than 4mg / L, feeding on the positioning, quantity , quality, time. Four times a day, summer water and fertilizer can be used per acre to catch grass carp 500g tail 3 to 5 tail, carp to eat phytoplankton transparency.
2.2.2.2 Couplings Feeding is not carried out. Carps use natural foods such as shrimp and aquatic insects in ponds to grow.
Choose grass-family fish ponds as appropriate, lean water, deep-seated oxygen and small changes in day and night, do not tame compound feed or fish that can not be domesticated and transferred into the pond once, and stocks of 1 to 3 fish per mu of stocking 200 g should. With an aerator, it requires easy injection and drainage. The high-yield ponds, pupa and pontoon ponds of adult fish were used to cultivate plankton due to fertilization. The dissolved oxygen in the ponds varied greatly day and night. The Chinese sturgeon could not adapt. The quail and carp ponds were similar to the clams in competition for food due to the similar diet.
2.3 Cage culture
Net cages can be set up in reservoirs, rivers, and other water areas with good water quality and no pollution, and the water depth should be greater than 5 m. Fish cages of 50-500 g/tail were used with cages of 20 rTl2, and cages of 500 g/fig. or larger were used with cages of 60 m2. The size of the net depends on the size of the species and it is appropriate to avoid fish. It is better to use two layers of cages. The depth of cages entering the water is generally 2 m. When the water temperature is high from July to August, it can reach 3 m. There are bait stations in the cages. It is generally based on monoculture, but it can also be used with a few fish and squid to clean the net. It is advisable to put 50 g or more into each finger, preferably about 200 g per tail. When entering the box, the water temperature is 15～16°C, the stocking density is 50～100g/tailed seedlings, 30～20 tails/carton, 100～500g/tailings, 20～15 tails/carton, 500～1000g/tails. Put 15 to 10 tails/carton, put 1,000 to 2000 g/tail on 8 to 5 tails/carton. Because of the sharpness of the Chinese iliac plate, frequent swimming and high oxygen consumption, the use of water is mainly planar, and its density should be lower than other species.
Feeding and management: a small number of times, the daily vote 6 times, inconvenient to vote 3 to 4 times, feeding rate is generally 3 to 4% of body weight, and according to the growth of fish, feeding, water temperature adjustment. Check and clean the algae and dirt attached to the inside and outside of the cage regularly, and flush the cage at least once every two months. Change direction of movement. When it was scared, it accelerated and even pulled out of the water.
1.8 Food habits
It is a moderately meaty fish that feed on benthic animals. Under natural conditions, juvenile fishes are bred by aquatic oligochaites, aquatic insect larvae, and leeches. The rivers from the lower reaches of the Yangtze River to the first invertebrate are mainly shrimps and crabs, and they enter the first year of estuarine waters in estuaries. Fish (Aphids, Tongue, Goby, Anchovy, etc.), Nereis, and shrimps are the main species, and fish and clams are also eaten. In the sea, the main food for salmon is fish, crabs, and shellfish, with the largest number of benthic fish and crabs. The broodstock has a strong ability to fight hunger. It completely stops feeding on the way to upstream rivers. The cub's hunger-resistance time can be up to 15 days, but it is more than 6% of the body weight when gluttonous and satiation. Artificially cultivated Chinese sturgeon may be domesticated to feed artificial compound feed.
1.9 Growth rate
Chinese sturgeon has the characteristics of large individuals, long life cycle, fast growth, and late sexual maturity. Under natural conditions, the average body length of the first-instar fish is 57cm and the weight is 1.5kg; the average age of the 2nd-age fish is 75cm and the weight is 3.5kg; the average body length of the 3rd-instar fish is 9lcm and the average body weight is 6.4kg; The body length is 106cm and the average body weight is 10kg. The average age of the 5th instar is 120cm and the average body weight is 15kg. It grows more rapidly under artificial culture. At a water temperature of 14-29C, the average body weight of 11-month-old fish species reaches 3.5kg, and the average body weight of 14-month-old fish species reaches 5kg.
1.10 Breeding habits
After the broodstock crossed the river in July and August to swim in freshwater and stay for one year, they lay eggs in the fall of October to January. The females usually have sexual maturity of 14 years old and the smallest mature individuals have a body length of 213.239 cm. The body weight is 12-148 kg and the average egg production is 640,000. Male sexual maturity age is the earliest 9 years, the smallest mature individual body length is 169 ~ 17lcm, weight is 38 ~ 50kg. The sex ratio is close to l:1.
2 Adult culture method
2.1 Precautions
1.1 Switch to Food
All kinds of size Chinese sturgeons of 3 to 300g are customarily called salmon species. After raising the seedlings to a length of about 10cm and a fish weight of 3 to 5kg, they can enter the breeding of the inbreeds. The key to this period is the conversion of the feed, that is, the seed from the feeding of fresh food (water The process of transforming waterflies and harvest bugs into foods for feeding. The size of the transferred species is generally 2 to 250 g, and the transfer time is determined based on the amount of live feed and the temperature of the culture water. If the supply of live bait is adequate, it can be reared for more food and the temperature of the water should be 15 to 16°C. There are many types of feeds used for switching feeds. The carp eats soft, smooth and smooth feeds. The soft pellet feeds with full nutrition and good palatability change quickly, and only three days for transfer and acclimation. Most catfishes Can eat normally, the rate of switching is 95%. The use of semi-wet pellet feeds requires 5 to 7 days for food to be fed and 8 to hard pellet feeds.
On the 10th day, the switching rate was 75-95%. Adding a certain amount of blisters to the feed during the transfer period can increase the feed intake of the feed.
Feeding rate
Do not feed when dissolved oxygen falls below 3 mg/L, and fish do not eat. Before the thunderstorm, the weather was low and the weather was sweltering. When the cold wave came, the temperature dropped suddenly without feeding. When the water temperature is 14°C-17°C, the appropriate feeding rate of 3-40g pigtail formula feed is 5% of the body weight. When the water temperature is 13-15°C, the feed rate of 70-140g pups feed is 2% of the body weight. Around, the feed rate of live bait may be 6 to 10%, feeding from 6 to 8 times daily at 7 to 21 hours, and feeding slowly, with a small number of times is appropriate. When the water temperature is lower than 14°C or higher than 28°C, the feeding amount should be reduced. After being cultured to more than 500g, it can be gradually transformed into aquaculture with adult clams or clams or soft-shelled turtles. The feed ratio of compound feed is generally O. 8 to 1.8, natural food is 8 to 15.
Water quality
Carp is more demanding on water quality than other fish. It requires separate and convenient drainage and water supply, sufficient water supply, clean water, and thin water. It meets the requirements for freshwater fishery water quality and requirements for catfish culture in China. The transparency is greater than 50 C/lq, and the dissolved oxygen is greater than 6ppm. An aerator is required.
2.2 Cultivation methods
Cement pond farming
The water temperature is suitable, shading nets are required in outdoor pools and aerators are provided. In order to facilitate management and observation, the ponds for juvenile and young larval fish farming should be smaller and lighter. As the fish grows, the pool area gradually increases and the water depth gradually increases. Aberdeen (just hatched to 5 em or less) Aquaculture pond area is generally less than 10 square meters, depth of water O. 5～0.7m; young duck pond (1～100g/tail) 10～30 square meters, water depth 0.6～0.8m; 1～2 years old fish (100～5000g/tail) pool 30～120 square meters, Water depth 0.8 to 1. Om; adult fish (over 5000 g/tail) 120 to 250 square meters, water depth 1 to 1.5 meters. Black shading nets above the pool. The drainage is generally up and down. The shape of the pool is round, square and rectangular. The round pool is convenient for automatic drainage and management. The bottom of the tank is required to be smooth, with a slope of 2 to 5% on the bottom facing the outfall. Drain outlets are provided with box-shaped or column-shaped fish stopping facilities, and the bottom of the pool is suitable for close to natural colors. With 1 aerator / 200mz, keep more than 6ppm of dissolved oxygen, transparency more than 50cm. Breeding density is O. 5 ~ 1 kg / tail, 30 ~ 20 / square meter; 2 ~ 3 kg / tail is 10 ~ 5 tail / square meter, 4 ~ 5 kg / tail is 3 ~ 2 tail / square meter.
Pond farming
Single-cultivated area of ​​1 to 5 acres can be, water depth 1.5 ~ 2m. The bottom of the pool is flat, with less silt, water-free grasses, no leakage, sink feed benches along the pool edge, bricks made of cement, bricks, trapezoidal shape, gentle slope shape (it can also use temporary materials to build temporary), slope About 15 to 30, with an area of ​​4 to 6 square meters, 1 to 2 ponds and 3 to 4 ponds. Xiatang fish species have been completely switched to feed, individual uniformity, weight 100 ~ 200g / tail, put the breeding density of 350 ~ 650 tail / acre, the minimum dissolved oxygen in the morning should not be less than 4mg / L, feeding on the positioning, quantity , quality, time. Four times daily shooting, summer water and fertilizer can be used per acre to catch grass carp 500 g tail of 3 to 5 tail, carp to eat phytoplankton transparency.
Set up
Without feeding, squid grows using natural foods such as shrimp fish and aquatic insects in ponds. Choose grass-family fish ponds as appropriate, water lean, deep-seated oxygen diurnal changes, do not tame compound feed or after a non-domesticated transfusing fish into the pond, 200 g per acre stocking species of 1 to 3 tail is appropriate . With an aerator, it requires easy injection and drainage. The high-yield ponds, pupa and pontoon ponds of adult fish were used to cultivate plankton due to fertilization. The dissolved oxygen in the ponds varied greatly day and night. The Chinese sturgeon could not adapt. The quail and carp ponds were similar to the clams in competition for food due to the similar diet.
Cage culture Net cages can be set up in reservoirs, rivers, and other waters with good water quality and no pollution, and the water depth should be greater than 5m. Fish cages of 50-500 g/tail are used with cages of 20 rTl2, and large fish species of 500 g/head or more are used with cages of 60 m2. The size of the net depends on the size of the species and it is appropriate to avoid fish. It is better to use two layers of cages and the depth of cages is generally 2m. When the water temperature is high in July to August, it can reach 3m. There are bait stations in the cages. It is generally based on monoculture, but it can also be used with a few fish and squid to clean the net. It is advisable to put 50g or more into each finger, preferably about 200g per tail. When entering the box, the water temperature is 15～16°C, the stocking density is 50～100g/tailed seedlings, 30～20 tails/carton, 100～500g/tailings, 20～15 tails/carton, 500～1000g/tails. Put 15 to 10 tails/carton, put 1,000 to 2000 g/tail on 8 to 5 tails/carton. Because of the sharpness of the Chinese iliac plate, frequent swimming and high oxygen consumption, the use of water is mainly planar, and its density should be lower than other species.
Feeding and management: a small number of times, the daily vote 6 times, inconvenient to vote 3 to 4 times, feeding rate is generally 3 to 4% of body weight, and according to the growth of fish, feeding, water temperature adjustment. Check and clean the algae and dirt attached to the inside and outside of the cage regularly, and flush the cage at least once every two months.
Organic GoJi Berries come from the high Himalayas in Tibet. Since the GoJi Berries are picked and carefully sorted by size and quality our mission is to provide our customer with the highest possible quality without any contaminant.
Private label Organic GoJi Berries
Goji Berry or Wolf Berries are one of the most popular superfoods and grow in the Himalayan Mountains of Tibet. The products are sorted and picked carefully by our farmers, after sorting the products are prepared for consumption. Before we ship them to our customers, we firstly analyze the Organic GoJi Berries for any contaminant! Only the Organic GoJi Berries are imported after approval of the analysis.
Why Organic GoJi Berries?
Organic GoJi Berries are mostly known as the anti-aging berrie andknown to provide energie. Also, the GoJi known for its libido enhancing properties. GoJi are mainly grown in China and has the similar taste to the Cranberry.
Available
Organic GoJi is available in different types of shapes and sizes, usually we deliver the size 220/280/320/350 and so on, but can also supply other sizes. GoJi is also available as a powder or juice powder!
Product Description
| Specfication: | |
| Type: |
dried Organic Goji Berry
|
| Size: | 220grains, 280grains, 320grains, 350grains, 360grains,380grains, 500grains,580grains,600grains |
| Taste: | Sweet |
| Humidity/Moisture (%): | ≤13%; |
| SO2: | ≤ 5PPM |
| Sugar: | ≤ 25% |
| Payment & Shipping Terms: | T/T or D/P at sight. |
| Packaging: | Bulk 4X5KGS/CTN; 11MTS/20GP 2X10KGS/CTN; 11MTS/20GP;12.5MTS/20GP |
| Minimum Order Quantity: | 500 Kilograms |
Packaging & Shipping
1. Bulk 4bags*5kgs/CTNS; 11MT/20GP
2.As clients requirements
Organic Goji Berry
Organic Goji Berry,Natural Goji Berry,Healthy Goji Berry,Dark Red Goji Berry
NINGXIA HONG RISING BIOLOGICAL TECHNOLOGY CO.,LTD. , http://www.hongrisinggoji.com