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Experience Sharing on Rotational Culture of Giant Freshwater Prawn and Mandarin Fish
Macrobrachium rosenbergii is not tolerant of low temperatures. In late autumn and early winter, when the water temperature drops to 15°C, the pond must be drained and the prawns harvested for market in a timely manner. In this way, the Macrobrachium rosenbergii culture pond is actually only utilized for half a year (May to October). Mandarin fish do not completely stop feeding in winter and continue to grow, only with reduced feeding intensity and growth rate.
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The importance of black carp broodstock rearing cannot be overlooked
The quality of broodstock rearing not only determines whether spawning can be induced successfully, but also directly affects the broodstock's egg-carrying capacity, hatching rate, and the survival rate and growth speed of the fry. Therefore, according to the different stages of gonad development in broodstock, a comprehensive
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Detailed Explanation of Key Points in Yellow Catfish Rearing and Management Techniques
1. Pond Clearing and Disinfection After stocking the pond for 7-10 days, use quicklime at 150 kg-200 kg/667 sq m for dry pond disinfection to eliminate pathogenic organisms and predators. 2. Feeding and Fertilization The pond is equipped with feed and fertilizer according to the annual production plan. The feed is mainly sinking pellet compound
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Experience in Rearing Yellow Catfish Fingerlings in Ponds
Based on the characteristics at this stage, such as the increased size of yellow catfish fry, feeding habits basically similar to those of adult fish, stronger schooling behavior, increased food intake, and stronger adaptability to the ecological environment, and given that water temperatures are generally high during the rearing process, it is necessary to take into account the characteristics of yellow catfish and grasp
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Sharing Experience in Micro-Cage Culture of Yellow Catfish
Setting up micro-cages in ponds used for culturing other aquatic products to raise yellow catfish requires little investment, yields quick results, and is easy to operate. Cage setup. The cage is sewn from polyethylene netting, 2 m long, 2 m wide, and 1.2 m high, with a mesh size of 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 is 20 cm high to reduce feed loss, and the upper part of the cage rises about 30 cm above the water surface. A square plastic basket made of 18-mesh polyethylene window screen, 10 cm high and 30 cm on each side, is used as a feeding platform and placed in the middle of the cage body, one per cage. The cages are set at the water inlet of the fish pond, and 1-3 cages can be placed per mu of fish pond. The cages can also be set in open waters with fresh water quality, sufficient dissolved oxygen, shelter from wind and sun, and no pollution, arranged in a straight line, with a cage spacing of 4 m and a row spacing of about 10 m. Water hyacinth or alligator weed is transplanted inside the cage to cover about 2/3 of the cage area.</p><p></p><p>Fingerling stocking. The cages are put into the water 1-2 weeks before fingerling stocking. The fingerlings are required to be disease-free and injury-free, robust, and uniform in size. Stock 100-150 large-size fingerlings weighing about 20 g each per square meter.</p><p>Feeding management.</p><p>① Feeding: Common feeds include small miscellaneous fish, snail and clam meat, earthworms, silkworm pupae, livestock and poultry viscera, and animal blood, etc. Feed according to the principles of fixed time, fixed location, fixed quality, and fixed quantity to ensure the yellow catfish eat enough and eat well and grow quickly.</p><p>② Water management: Keep the water quality fresh and the dissolved oxygen sufficient. Observe the fish activity every day, check whether the cage is damaged, remove sick and dead fish from the cage, and keep the water body inside the cage clean. Clean the cage once a week to ensure normal exchange of water inside and outside the cage, and adjust the height of the cage in time when the water level changes.</p><p>Disease prevention and control. Soak the cage in bleaching powder solution for 30 minutes before it enters the water; soak the fish body in salt solution before the fingerlings enter the cage to kill pathogens and parasites on the body surface; splash quicklime water over the whole cage for disinfection once every 10-15 days; regularly hang bags of copper sulfate and ferrous sulfate mixture; about every 20 days, make medicated bait with antibiotics and feed continuously for 2-3 days. Through the above measures, fish diseases can be prevented during the culture cycle.</p>
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Key Technical Points for Fry Rearing in Yellow Catfish Aquaculture
Rearing yellow catfish fry (commonly known as "water flowers") with a body length of 1.5-1.2 cm to fry of 5-6 cm in size (known as "fire-flake fingerlings") takes about half a month. The rearing methods at this stage include pond rearing, flowing-water tank rearing and net-cage rearing. Compared with fingerling rearing
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Practical Experience Sharing on Temporary Rearing of Yellow Catfish Fry
The temporary rearing and cultivation stage of yellow catfish fry refers to the brief process in which newly hatched larvae that cannot swim freely are cultivated with careful nursing methods into individuals that can swim and feed on their own. The temporary rearing and cultivation of fry is also called larval-stage temporary rearing. (1) Facility conditions The fry's
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Experience sharing on mixed culture of river crab and bass in ponds
1 Pond clearing and preparation After the pond is exposed to the sun, use 80kg of quicklime per 1/15 hectare to clear the pond and disinfect it, killing harmful organisms and pathogenic bacteria. 7d before stocking crab seedlings, fill with water to about 0.5m, apply 60kg of chicken manure per 1/15 hectare, cultivate plankton feed, and make the water color yellow-green, with transparency
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How are bass fry cultivated? Sharing bass farming techniques
Bass fry can be cultivated in ponds, or in cement tanks, fiberglass troughs, canvas troughs, or in cages. There are many people in China who farm bass, because bass has few bones and is therefore deeply loved by people. Bass fry cultivation for bass farming
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Experience and Technical Key Points for Pond Farming of Bass
1. Pond clearing and water cultivation. For ponds used to farm bass, it is best if conditions allow to dry the pond, remove silt and expose it to sunlight, especially for old ponds that have been farmed for many years. Disinfect once half a month before releasing fry, applying 50 kg of quicklime per mu or using 20 PPM bleaching powder with an appropriate amount of pond water for disinfection.
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