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Control Methods for Ichthyophthirius multifiliis Disease in Farmed Yellow Catfish
(1) Pathogen: Ichthyophthirius multifiliis. (2) Symptoms: On the skin, fins and gills of diseased fish, small white cyst-like spots can be seen with the naked eye; in severe cases, the body surface appears to be covered with a white film. Diseased fish respond sluggishly or float at the water surface. Due to bacterial infection at the affected sites, the fish body surface becomes inflamed, or locally necrotic, scales fall off, fins split diagonally, gill epithelium proliferates, and death occurs due to impaired movement and difficulty breathing in the gill area.
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Cage specifications for yellow catfish cage culture
Cage specifications include the mesh size and the length, width, and height of the cage. For cages used to culture yellow catfish, the cage body should not be too large; these are small cages. The mesh size depends on the size of the fish fry stocked. 1. Matching cages of different specifications Cage matching means setting up cages of different specifications according to the different growth stages of the fish fry. To stock fry about 2 cm long, it is necessary to prepare sufficient first- and second- (or third-) level fry cages and first- and second-level grow-out cages with different mesh sizes. If fry 5 cm long are stocked, it is only necessary to prepare sufficient second-level grow-out cages with different mesh sizes, so that individuals with growth differences can be separated and reared.
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Methods and Technical Key Points for Polyculture of Yellow Catfish in Ponds
Polyculture of yellow catfish in ponds is also called pond supplementary culture or pond mixed culture of yellow catfish, which can be yellow catfish (Pelteobagrus fulvidraco) or darkbarbel catfish (Pelteobagrus vachelli). Because yellow catfish has strong environmental adaptability, the aquaculture technology for polyculture of yellow catfish is relatively simple. (I) Pond condition requirements According to the
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How to stock fry in cage culture of yellow catfish
I) Preparation before stocking fry 1. Preparation of cages of different specifications Cages of corresponding specifications should be prepared according to the size of the fry to be stocked. If the stocking size is 2 cm, second- or third-stage fry cages and second-stage grow-out cages should be prepared; for fry of 5 cm, second-stage fingerling and second-stage grow-out cages should be prepared
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Feeding Methods for Yellow Catfish in Cage Culture
(1) Feed types. (1) Basic arrangement for full-cycle feeding. In practice, the feed for cultured yellow catfish is exactly the same as that for yellow catfish mainly raised in ponds. In addition to compound feed, first-level fingerling cages can use bloodworms and aquatic earthworms as feed, and can also be fed fish paste made mainly from small trash fish.
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Daily Management Essentials for Cage Culture of Yellow Catfish
The daily management of yellow catfish raised in cages includes cage inspection, fish growth inspection, cage net cleaning and disease prevention and control. 1) Routine inspection Routine inspection includes cage net inspection and inspection of fish growth inside the cage. 1. Cage net inspection Cage net inspection
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Key Points of Ecological Aquaculture Technology for Yellow Catfish in Paddy Fields
I. Selection of the breeding area The breeding area is 65 hectares, with complete water, electricity and other facilities and convenient transportation. II. Paddy field engineering construction 1. For the field engineering, 10 mu is taken as one ecological aquaculture unit for yellow catfish in paddy fields. On the inner side of the paddy field ridge, a ring ditch with a top width of 1.5m, bottom width of 0.5m and depth of 0
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Technical Key Points for Constructing Flow-Through Aquaculture Ponds for Yellow Catfish
1) Water quality and water source 1. Water quality requirements The water quality for flow-through aquaculture of yellow catfish must be tested before deciding on the aquaculture operation, to see whether the water quality meets the pollution-free aquaculture water quality standards. For example, whether the waste hot water discharged from industrial production has been polluted by industrial oil, etc., and whether the minerals contained in underground hot spring water exceed the standard, are all objects of attention.
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Detailed Explanation of Key Technical Points for Bighead Carp Cage Culture
Cage fish farming technology is a three-dimensional aquaculture technique that makes full use of reservoir resources. It has the advantages of low farming cost and high benefits, and is deeply favored by the vast number of fish farmers. Among them, the technique of using cages to culture bighead carp is one of the most profitable among many farming projects.
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Nine Key Points to Note During the Peak Growing Season for Fish Farming
1. Prevent starvation. Fish have a large food intake during the peak growing season, so more bait should be fed. In ponds mainly stocked with grass carp, crucian carp, tilapia, etc., mixed baits such as wheat bran, oilseed cake, and bean dregs, as well as fresh baits such as tender grass and plant stems and leaves, should be fed. Under normal circumstances, the daily amount of coarse feed fed should account for
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