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What are the precautions for stocking fish fingerlings in early spring? Farmers should keep these points in mind
1. Fingerling quality: The fingerlings to be stocked should be of the same species and same age, uniform in size, robust and uninjured, with intact scales and fin rays, strong upstream swimming ability, and after being removed from water, the gill cover should not open and the fish should keep jumping. 2. Fingerling disinfection: When disinfecting fingerlings, note: ① The medicine should be prepared and used immediately; use clean water to prepare the solution, avoid using fertilized water, and avoid direct sunlight when soaking the fingerlings in the medicine. ② The dosage must be accurate, avoiding insufficient or excessive medication. ③ The soaking time should be appropriate. If signs of poisoning appear in the fingerlings, immediately add water
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Detailed Explanation of Key Technical Points for Restocking Fish Fingerlings After Heavy Rain
Every year, some areas are hit by typhoons and heavy rain, causing fish pond embankments to collapse and serious fish escapes. After the rainy season, timely restocking of fish fingerlings will reduce the losses caused by flooding to a minimum. The techniques for restocking fish fingerlings after heavy rain are introduced below. 1. Sources of fish fingerlings After heavy rain, if the weather is hot, fish fingerlings are not convenient to transport over long distances, so they are generally obtained locally, or caught from nearby natural water bodies. The caught fish fingerlings should be stocked nearby, and the time out of water must not be too long. All operations
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Methods and techniques for stocking fish fingerlings in early spring
Early spring is the best season for stocking fish fingerlings, because during this period the water temperature is relatively low, the fish's activity is reduced, and the fish scales are tight, the fish body is firm, and they are not easily injured during netting, catching and transport, which can increase the survival rate of stocked fingerlings. When stocking fingerlings, attention should be paid to the following aspects: fingerling quality - fingerlings of the same species and same age should be uniform in size, with little difference in body length and weight, thick back muscles, bright coloration, scales and fins intact without damage, swimming actively and normally, strong upstream-swimming ability, and after being taken out of the water and placed in a basin, the gill covers do not open and the tail
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Detailed Explanation of Key Cultivation Techniques for Yongchun Finger Citron Tea
I. Planting Techniques The construction of tea gardens should attach importance to ecological balance, without destroying natural resources, and to soil and water conservation. Proceeding from the actual local conditions of tea production, tea production bases should be built in a concentrated manner, appropriately concentrated and contiguous, so as to facilitate management, reduce costs, increase benefits, and be more conducive to centralized factory processing and improving tea quality. The construction of tea gardens should also adhere to high standards and high quality, and gradually achieve improved tea tree varieties, garden-style tea areas, water conservancy in tea gardens, and scientific cultivation. 1. Tea trees
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Detailed Explanation of Key Technical Points for Autumn Fingerling Cultivation
Autumn water temperature fluctuates between 20-30°C, making it a good period for fish growth, especially for smaller-sized and weaker fingerlings, as this is the fattening season. Farmers must effectively strengthen fingerling cultivation. 1. Disinfect and clear the pond, transfer to a new pond: Old fish ponds used for fingerling cultivation, after several months of feeding through spring and summer, gradually experience aging water quality, reduced dissolved oxygen and food organisms, and increased pathogenic microorganisms, which will cause stagnation of fingerling growth. Grass carp fingerlings are more susceptible to disease in such old ponds. At this time, fingerlings should be transferred to new ponds for intensive cultivation. In areas lacking water sources
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Cage Culture Technology for Silver Carp and Bighead Carp Fingerlings: Using Small and Medium-sized Reservoirs as Broodstock Bases
As the main drinking water source for Beijing, Miyun Reservoir plays a decisive role in the capital's economic development and social stability. In order to scientifically convert the nutrients and aquatic organisms in the water body of Miyun Reservoir, purify the water quality, and protect this basin of "water of life" for the capital, after the cancellation of cage fish farming, the Miyun County government increased the amount of fingerlings stocked, releasing 485,000 kg, nearly ten million individuals, of silver carp, bighead carp, bream, grass carp and other fingerlings into Miyun Reservoir each year, aiming to reduce the nutrient load of the water body through fishery production. However
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Five key points for autumn fingerling management, farmers need to pay attention
Autumn water temperatures are suitable, making it the peak season for fish growth. Fingerling management should focus on the following 5 tasks. 1. Pond clearing. Transfer the fingerlings to a pond that has been cleared and disinfected for rearing. Where water sources and pond rotation are difficult, all fingerlings can be transferred out temporarily for holding, then the original pond disinfected with quicklime at 75-100 kg per 667 sq m of water surface, and the water fertilized by conventional methods. Wait until the drug effect has dissipated before transferring the fingerlings back. 2. Grading. Since larger fingerlings have a big appetite and strong ability to compete for food, if large and small fingerlings are mixed, the small fish will
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Detailed Explanation of Key Techniques for Autumn Fish Fingerling Rearing
Autumn water temperature generally fluctuates between 20°C and 30°C, making it a good period for fish growth. It is especially the fattening season for smaller, weaker fingerlings, so farmers must effectively strengthen fingerling rearing. Disinfect and clear the pond. For old fish ponds converted to new ponds for fingerling rearing, after several months of rearing in spring and summer, water quality gradually deteriorates, dissolved oxygen and natural food organisms decrease, and pathogenic microorganisms increase, which can stunt fingerling growth. Grass carp fingerlings in particular are more prone to disease in such old ponds. At this time
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Detailed Explanation of Large Yellow Croaker Fingerling Cage Culture Techniques
I. Cage Setup 1. Selection of Sea Area The water flow velocity in the sea area is generally within 1 m/s, and the flow direction is straight and stable; avoid setting up in sea areas with eddy currents. At low tide, the bottom of the cage should be at least 1.5 m above the seabed. Throughout the year, the surface water temperature in the sea area ranges from 7-30°C, salinity from 12-32, and transparency from 0.2-3.0 m. 2. Selection of Cage Specifications Currently, the cages used for cultivating large yellow croaker fingerlings are all floating cages, that is, the cages are hung on a wooden frame with 10 frame positions of 5 m × 5 m.
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Stocking fish fingerlings in cages in autumn has many benefits, and the timing of release matters
After autumn fertilization in the pond, fish fingerlings are generally in robust health and adapt easily to the cage environment. At the same time, overwintering in sunken cages in large water bodies not only consumes less body weight in the fingerlings than overwintering in ponds, but also, after overwintering ends and the cages are raised in spring, the fish begin feeding earlier, and their growth period is extended by about 1 month compared with fish stocked in spring, so the fish grow quickly and production increases noticeably. Compared with fingerlings stocked in spring, fingerlings overwintered in sunken cages grow about 30% faster and are about 35% larger in size when removed from the cages. Therefore, stocking fingerlings in cages in autumn for overwintering is a relatively scientific
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