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Yellow Catfish Polyculture Technology: Efficient Micro-net Cage Farming Method
Setting up micro-net cages in ponds used for farming other aquatic species to raise yellow catfish is a high-yield farming method that increases water surface utilization, featuring simple operation, low investment, easy rearing, fast growth and high returns. 1 Net cage setup The net cage is sewn from polyethylene netting, 2 m long, 2 m wide and 1.2 m high, with a mesh size of 0.5-1 cm. The cage uses a closed stretcher floating-fixed type, with a 9-mesh net cloth as a cushion layer at the bottom, the cushion layer edge being 20 cm high, to reduce feed loss; the upper part of the cage rises 30 cm above the water surface
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Releasing fish fry in early spring requires care; keep these precautions in mind
Fish fry quality For fish fry of the same species and same age, the specifications should be uniform, with little difference in body length and body weight, thick back muscles, bright color, intact scales and fin rays, normal activity, and strong upstream-swimming ability. After being taken out of the water and placed in a basin, the gill covers should not open, the tail should not bend, and the fish should keep jumping, with no wounds or parasites on the body surface. Fish fry disinfection Some farmers do not disinfect fish fry at all when releasing them, resulting in a high disease rate, and drug treatment is not ideal. In fact, as long as fish fry disinfection is done well, disease prevention can often achieve twice the result with half the effort
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Breeding Techniques and Management Methods for Adult Snakehead Fish
Snakehead fish is a valuable freshwater fish of high economic value, known as the "treasure among fish." It is highly nutritious and contains a large amount of protein, more than that found in chicken and beef. From a nutritional standpoint, snakehead fish is a premium health food that is nutritionally complete and has delicious meat. Breeding adult snakehead fish refers to the production process of raising fingerlings into food fish in small water bodies such as ponds, tanks and cages. Artificial snakehead fish farming includes two types: extensive polyculture and intensive monoculture. Extensive polyculture means raising them together with the Four Major Chinese Carps and other fish in a fishing pond. Intensive mono
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What medication should be used to disinfect fish fingerlings? Polymeric iodine works well
Winter and spring are the seasons with a high incidence of fish saprolegniasis, so disinfection of fish fingerlings must focus on preventing and treating saprolegniasis. After the specific remedy malachite green was banned, polymeric iodine is a relatively ideal medication for preventing and treating saprolegniasis. The full name of polymeric iodine is compound S polymeric iodine. It has an extremely strong killing effect on bacteria, viruses and fungi, and its bactericidal capacity is more than 10 times higher than that of povidone iodine. In addition, polymeric iodine contains a relatively high amount of traditional Chinese medicine ingredients, and for fish fingerlings injured by net-pulling operations and long-distance transport, it has the function of healing wounds extremely quickly.
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Sensory methods for judging the quality of pelleted fish feed
With the rise of intensive aquaculture, the use of pelleted fish feed has become very common. However, there are many feed brands on the market today. There are also great differences in quality and grade. Some farmers may feel at a loss about this and can only choose based on manufacturers' advertising or fellow farmers' evaluations of a certain feed, or even try frequently changing between different brands of feed, and so on. To some extent, these practices are all somewhat blind. Here we recommend a simple sensory method summarized from practical experience for preliminarily
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Dried fish fillets
1. Raw materials: Fresh monkfish is preferred; fish of poor freshness but without a putrid odor, and of varying sizes, can all be processed. Generally, those under 2 kg are suitable for splitting open into fillets, freezing or drying; those over 2 kg, after splitting, can have the tail muscle removed to make meat strips. 2. Splitting: Place the rinsed fish body on a cutting board, belly facing up, head toward you, use a knife to cut from the neck along the midline of the belly to the tail, then bring the knife back to cut open the fish head, split open both gills to make a fully opened fillet, remove the internal organs, then from the flesh side
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Key Technical Points for Integrated High-Efficiency Duck-Pig-Fish Farming
Through integrated farming, ducks, pigs, and fish can make full and rational use of energy, achieving the goals of saving feed and attaining high yield and high efficiency. The integrated high-efficiency duck-pig-fish farming method is: 1. Select superior breeds. For ducks, Cherry Valley ducks are best; for pigs, crossbred Landrace pigs and other improved breeds; for fish, mainly silver carp, bighead carp, black carp, grass carp, etc. These breeds tolerate coarse feed and grow fast. 2. Management of duck pens, pig houses, and fish ponds. Duck pens, pig houses, and fish ponds should be concentrated and conveniently located for transport to facilitate management. Keep the
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Prevention and Treatment Methods for Bacterial Diseases in Conventional Farmed Fish
In recent years, because the problem of drug residues has dealt a blow to China's aquatic product exports, the government has carried out a large-scale rectification of the entire fishery drug market, successively announcing a large number of banned drugs for aquaculture, such as chloramphenicol, furazolidone, malachite green, sodium pentachlorophenate, etc. Because special aquatic products have high economic value and a relatively large export market, through the joint efforts of all parties, the use of banned drugs has been well controlled. In the process of conventional fish farming, bacterial diseases occur relatively frequently,
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What are the compound additive formulas for omnivorous fish?
Carp and tilapia: Minerals or trace elements (mg): each gram of premix contains iron 50, copper 3, cobalt 0.01, manganese 20, zinc 30, iodine 0.1, selenium 0.01, the amount added to feed is 0.1. Vitamin mixture composition (mg): each gram of premix contains A 1000 IU, E 10 IU, K2 2, B1 4, B2 4, pantothenic acid 10, nicotinic acid 20, pyridoxine 4, folic acid 1, C 40, B12 0.004, biotin
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What are the precautions for fish harvesting during freezing periods?
The Spring Festival is approaching, which is an important period for harvesting aquatic products. Brood fish and fish about to be sold are raised together, so attention must be paid to protecting the brood fish from freezing. Do not carry out operations when freezing occurs. Add water to ensure a water depth of 1.5 m to 2 m to stabilize the temperature. Try to avoid exposing the brood fish to the air. Harvested brood fish should be bathed in 2% salt water for 15 minutes to 20 minutes to prevent and treat saprolegniasis. In places where eels are raised in net cages, the net cages should be promptly sunk to the bottom to contact the silt, and straw should be added on top of the cages for coverage, with operations reduced as much as possible to ensure safe overwintering.
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