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Key points for overwintering management in the fry and fingerling culture of freshwater pomfret
The freshwater pomfret is a tropical fish species. Its main suitable growth temperature range is between 21-32°C, with the optimum range at 28-30°C. At a water temperature of 16°C, the pomfret only begins to eat a small amount; at 12°C, the fish's balance becomes disturbed; and at 10°C, it causes death. During the overwintering process, water temperatures that are too low
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How to prevent and treat saprolegniasis in freshwater pomfret during overwintering
1. Diseases commonly occurring in freshwater pomfret during overwintering. The most common fish diseases occurring in freshwater pomfret during overwintering are saprolegniasis, ichthyophthiriasis, trichodiniasis, chilodonelliasis, etc., especially ichthyophthiriasis, which can easily cause explosive death. The causes of various fish diseases are due to
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Overwintering management techniques for freshwater pomfret fry and fingerlings after being stocked into ponds
1. Overwintering pond preparation: area 600-1500 sq m, pond depth 1.5 m; the pond water in the Pukou District area of Nanjing is geothermal spring water, flowing into the pond in a slight current; the inlet pipe is 10 cm, and the mud at the pond bottom is 10 cm thick. After drying the pond and disinfecting it, fill with water. Each pond is equipped with two 3-kilowatt aerators. 2. Pomfret fry and fingerlings
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How to prevent and treat ichthyophthiriasis in freshwater pomfret during overwintering?
Ichthyophthiriasis is the second most common disease of freshwater pomfret during overwintering. Its incidence rate is lower than that of saprolegniasis, but the mortality rate per unit area is higher than that of saprolegniasis, and it can also lead to concurrent saprolegniasis. 1. Pathogen Ichthyophthirius multifiliis. 2. Symptoms On the body surface and
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Control methods for chilodonelliasis and trichodiniasis in freshwater white pomfret during the overwintering period
1. Pathogens: Chilodonella cyprini, Trichodina. 2. Symptoms: Both parasites attach to the skin and gills of fish, stimulating the secretion of large amounts of mucus, causing a pale blue film to form on the skin surface of diseased fish (chilodonelliasis) or a white film to appear on the fins, head, and body surface (trichodiniasis).
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In winter eel farming, pay attention to the prevention and treatment of enteritis disease
In winter, water temperature drops, changes in beneficial bacteria in the water, and changes in dissolved oxygen in the water body adversely affect the survival of eels, thereby causing a decline in eel constitution and immune function, and ultimately triggering enteritis disease, so attention must be paid to prevention and treatment. In winter, the temperature difference between day and night is large. Some
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Key Points of Winter Field Management Methods for Greenhouse Strawberries
Moisture retention In northern regions, film covering for insulation begins from late September to early October. In addition to double-layer insulation covering with large greenhouses and small arched sheds, winter strawberries can also be protected with measures such as leaf covering. Temperature and humidity management: In the early stage after planting, maintain 25°C-30°C during the day, and at night 12°C-
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Key Technical Points for Freeze Prevention in Winter Temporary Holding of River Crabs
1. Breaking the ice. Commercial crabs are held temporarily at high density, and after snow the temperature is relatively low, making aquaculture management more difficult. By opening ice holes or breaking the ice, on the one hand you can observe whether the overwintering pond is short of water or oxygen, and on the other hand, some harmful gases in the water body can escape. When oxygen in the water is low
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Three Major Technical Measures for Safe Overwintering in Snakehead Fish Farming
Although the value of snakehead fish is now gradually being recognized by more people, and more and more people are farming snakehead fish, anyone who has raised snakehead fish knows that snakehead fish are suited to warm environments. Once winter arrives and the temperature turns cold, the management and feeding of snakehead fish becomes relatively
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Key Technical Points for Muskrat Management in Autumn and Winter
I. Key Points for Autumn Management As autumn begins, the weather gradually turns cold, the stems and leaves of plants gradually wither, the reproductive organs of muskrats begin to decline, the young muskrats have already been weaned and separated, and the rearing period is coming to an end. Only a few muskrats are still nursing young or pregnant, entering a preparation stage before overwintering.
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