The squid series varieties have the characteristics of wide adaptability, rapid growth, short breeding cycle, good market prospects, and high economic benefits. Adopting cages to raise squid is a good intensive production method. It has the following advantages over larvae rearing in ponds: large exchange of water, adequate oxygen supply, low fish disease, high survival rate and yield, and centralized feeding and management. Convenience, convenient fishing, timely fishing according to need, conducive to regulating the market; fish eating good taste, no muddy taste, excellent product quality; saving water and electricity, manpower and other expenses and reduce unit costs, is conducive to market price competition . For commercial squid cage culture, attention should be paid to the following technical methods:
Choosing aquaculture in cages, lakes, rivers, etc., should be chosen to shelter the sun from the large and medium-sized waters, have a wide water surface, have small waves, a water depth of more than 5 meters, micro-flowing water, clean water, no pollution, and a volume of dissolved air of 5 per liter. More than milligrams of area. At the same time pay attention not only to avoid the main waterways, but also to facilitate transportation.
The cage net cages are mostly double-layered and made of polyethylene or polyvinyl chloride mesh sheets. The size of the cages depends on the scale. The length and width are usually 10m to 4m, 6m to 4m, 5m to 4m and 4 3 meters in height, 3 to 4 meters in height and 2.5 to 3.5 meters in depth. The size of the mesh depends on the size of the fish species. The principle of not escaping fish and facilitating the exchange of water bodies is generally 1.2 to 1.6 centimeters for catfish species weighing 20 to 50 grams, and 100 grams or more for the tail. ~ 3 cm. The bottom of the box is to be sewn with a dense mesh sieve net as food table to avoid loss of feed. The cages are generally frame-floating. They are supported by floating buckets and fixed by ropes. They can be lifted and lowered with fluctuations in the water level. They should be installed 7 to 10 days before the fish is released to allow the algae to grow in order to prevent the fish from being fed into the tank. Injured skin. Usually every 4 cages are a group, each group is more than 2 meters apart.
Reasonable stocking of squid species should be stocked in winter and spring, requiring strong physique, no injuries, disease-free, lively, large and neat specifications. The stocking density per square meter cage is 60 to 80 fish species weighing 30 to 50 grams, and 20 to 40 fish species weighing 100 to 200 grams. When stocking, soak the fish with 3% saline for 10 to 15 minutes.
Scientifically fed farmed squid must be fed full-grain pellet feed. Feed nutrition standards are: protein content is about 40%, of which animal protein accounts for more than 15%, fat is about 9%, carbohydrate is about 30%, and appropriate amount of vitamins, minerals, cellulose and so on. The feed should be palatable and the particle size should not be too large or too small. Generally, it is better to use 1/2 of the fish's mouth. The fish don't feed in the box within 2 days, allowing it to adapt to the cage environment; 2 days after feeding, feeding 5 to 6 times a day, the whole box is evenly cast, and generally 7 days later, the carp would like to eat with pellet feed. Enter the normal feeding stage and feed it 3 times a day. The time is from 7 to 8 o'clock in the morning, from 11 to 12 o'clock in the afternoon, and from 6 to 7 o'clock in the afternoon. Feed each meal for 15 to 20 minutes. Adhere to the principle of "Four Sets" and "Slightly more The second feeding method ensures that each fish can feed. Daily feeding amount: water temperature below 20°C is 0.5% to 1.5% of fish body weight; water temperature is 20°C to 30°C is 2% to 5%. The specific adjustment should be based on weather, water temperature, dissolved oxygen in water, and feeding and growth of fish.
Strengthen the management of the cages with special personnel for management, adhere to the early, middle and late tour boxes, do daily records of temperature, water temperature, feeding and dead fish, carefully observe the activities and growth of carp, when the size of the individual differences Keep boxes in a timely manner to avoid polarization. Ensure the safety of cages, prevent storm surge net cages, enemy damage cages, sediment debris netting cages, and check cages for holes. If any, repair them in time to prevent fish escape. Wash the cage regularly, usually every 7 to 10 days, 1 time, especially after the flood to be cleaned immediately to ensure the exchange of water inside and outside the box. Seriously grasp the prevention and treatment of fish diseases, usually found dead and injured fish to follow the fishing, to prevent pollution or cross-infection with each other. Every 20 days, 15 grams of quicklime and 0.3 grams of dibromohydantoin in cubic meters of water are sprinkled on cage water and nearby waters to prevent fish disease. In the case of parasitic diseases such as trichomonads, filariasis, and tongue beetles, 2 g of potassium permanganate may be used to sputter the water tank in every cubic metre of water. In the case of bacterial enteritis, 0.2% cesium may be added to feed. Tranin or allicin, fed continuously for 5 to 6 days, has a good control effect.
Choosing aquaculture in cages, lakes, rivers, etc., should be chosen to shelter the sun from the large and medium-sized waters, have a wide water surface, have small waves, a water depth of more than 5 meters, micro-flowing water, clean water, no pollution, and a volume of dissolved air of 5 per liter. More than milligrams of area. At the same time pay attention not only to avoid the main waterways, but also to facilitate transportation.
The cage net cages are mostly double-layered and made of polyethylene or polyvinyl chloride mesh sheets. The size of the cages depends on the scale. The length and width are usually 10m to 4m, 6m to 4m, 5m to 4m and 4 3 meters in height, 3 to 4 meters in height and 2.5 to 3.5 meters in depth. The size of the mesh depends on the size of the fish species. The principle of not escaping fish and facilitating the exchange of water bodies is generally 1.2 to 1.6 centimeters for catfish species weighing 20 to 50 grams, and 100 grams or more for the tail. ~ 3 cm. The bottom of the box is to be sewn with a dense mesh sieve net as food table to avoid loss of feed. The cages are generally frame-floating. They are supported by floating buckets and fixed by ropes. They can be lifted and lowered with fluctuations in the water level. They should be installed 7 to 10 days before the fish is released to allow the algae to grow in order to prevent the fish from being fed into the tank. Injured skin. Usually every 4 cages are a group, each group is more than 2 meters apart.
Reasonable stocking of squid species should be stocked in winter and spring, requiring strong physique, no injuries, disease-free, lively, large and neat specifications. The stocking density per square meter cage is 60 to 80 fish species weighing 30 to 50 grams, and 20 to 40 fish species weighing 100 to 200 grams. When stocking, soak the fish with 3% saline for 10 to 15 minutes.
Scientifically fed farmed squid must be fed full-grain pellet feed. Feed nutrition standards are: protein content is about 40%, of which animal protein accounts for more than 15%, fat is about 9%, carbohydrate is about 30%, and appropriate amount of vitamins, minerals, cellulose and so on. The feed should be palatable and the particle size should not be too large or too small. Generally, it is better to use 1/2 of the fish's mouth. The fish don't feed in the box within 2 days, allowing it to adapt to the cage environment; 2 days after feeding, feeding 5 to 6 times a day, the whole box is evenly cast, and generally 7 days later, the carp would like to eat with pellet feed. Enter the normal feeding stage and feed it 3 times a day. The time is from 7 to 8 o'clock in the morning, from 11 to 12 o'clock in the afternoon, and from 6 to 7 o'clock in the afternoon. Feed each meal for 15 to 20 minutes. Adhere to the principle of "Four Sets" and "Slightly more The second feeding method ensures that each fish can feed. Daily feeding amount: water temperature below 20°C is 0.5% to 1.5% of fish body weight; water temperature is 20°C to 30°C is 2% to 5%. The specific adjustment should be based on weather, water temperature, dissolved oxygen in water, and feeding and growth of fish.
Strengthen the management of the cages with special personnel for management, adhere to the early, middle and late tour boxes, do daily records of temperature, water temperature, feeding and dead fish, carefully observe the activities and growth of carp, when the size of the individual differences Keep boxes in a timely manner to avoid polarization. Ensure the safety of cages, prevent storm surge net cages, enemy damage cages, sediment debris netting cages, and check cages for holes. If any, repair them in time to prevent fish escape. Wash the cage regularly, usually every 7 to 10 days, 1 time, especially after the flood to be cleaned immediately to ensure the exchange of water inside and outside the box. Seriously grasp the prevention and treatment of fish diseases, usually found dead and injured fish to follow the fishing, to prevent pollution or cross-infection with each other. Every 20 days, 15 grams of quicklime and 0.3 grams of dibromohydantoin in cubic meters of water are sprinkled on cage water and nearby waters to prevent fish disease. In the case of parasitic diseases such as trichomonads, filariasis, and tongue beetles, 2 g of potassium permanganate may be used to sputter the water tank in every cubic metre of water. In the case of bacterial enteritis, 0.2% cesium may be added to feed. Tranin or allicin, fed continuously for 5 to 6 days, has a good control effect.
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