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The mandarin fish farming cycle is divided into 3 stages: fry rearing, fingerling rearing and grow-out farming
Abstract The mandarin fish farming cycle is mainly divided into the fry rearing stage, the fingerling rearing stage and the grow-out farming stage. Fry rearing stage: artificial induced spawning and artificial incubation are carried out. Fingerling rearing stage: after the mandarin fish fry hatch out of the membrane, a sieve net should be used to screen out the egg membrane, dead eggs and other debris, and then
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Detailed Explanation of Artificial Breeding Methods and Technical Key Points for the Chinese Giant Salamander
Giant Salamander Rearing Methods 1. Choosing a Suitable Environment Whether artificial breeding of the Chinese giant salamander succeeds depends crucially on the rearing environment. 1. The rearing water temperature must be suitable. According to many years of observation, the most suitable water temperature for giant salamander growth is 16-22°C. In low mountain areas, summer temperatures are higher; if the water temperature exceeds 26°C, giant salamander growth will be affected, sometimes causing a "summer dormancy" phenomenon, and excessively high temperatures can even cause death; however, if the altitude is too high and the ambient and water temperatures are too low, the effective growth period of the giant salamander is short and its growth rate is slow, making breeding unprofitable. Therefore, for breeding giant salamanders, the site should preferably be chosen in areas at an altitude of 500-800 m with no severe cold in winter and no extreme heat in summer.
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Key Technical Points for Fish Rearing and Management in Winter
First, take advantage of the great opportunity of the Double Festival to sell fish that have reached marketable size as early as possible, so as to recover funds. If the aquatic product market has supply exceeding demand and prices are truly sluggish, fish can be held and temporarily kept in ponds to avoid the peak sales period. However, in the sale of marketable fish
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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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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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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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How to carry out fry and fingerling rearing in mandarin fish aquaculture
Over the past ten years, mandarin fish fry rearing techniques have been continuously improved and enhanced, and the rearing methods have also become diverse, from the earliest pond rearing to factory-based fry rearing under artificially controlled conditions. Among them, the rearing methods currently considered relatively ideal include: hatching circular channel (tank) rearing
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Experience Sharing on Placing Fish-Rearing Cages in Flat-Bottomed Rivers
In flat-bottomed rivers with a water depth of more than 2.5 m and little year-round variation in water level, fish farming with cages works very well. 1) Generally speaking, a height of 50 cm between the cage bottom and the riverbed is sufficient. Leaving a gap between the cage bottom and the riverbed facilitates water flow, which first adds oxygen and second serves to exchange water ⟦4 <p>In flat-bottomed rivers with a water depth of more than 2.5 m and little year-round variation in water level, fish farming with cages works very well. </p><p></p><p>1) Generally speaking, a height of 50 cm between the cage bottom and the riverbed is sufficient. Leaving a gap between the cage bottom and the riverbed facilitates water flow, which first adds oxygen and second serves to exchange water and improve water quality. The height of the cage body can be 2.5-3 m. After this depth is immersed in water, 50 cm of netting is left above the water surface to prevent jumping fish from escaping. It is best to cover the top with netting to prevent birds from stealing and eating the fish. </p><p>2) It must be noted that the cage should be placed in a sunny spot, a place with a gentle flow speed, or a place with backflow. As far as the whole river channel is concerned, backflow areas are often places where fish gather; backflow areas have gentle flow speeds and abundant feed, making them very suitable for fish growth. </p><p>3) If the river channel is not deep, moso bamboo can be driven in as stakes, the cage tied with ropes, and marker lines indicating the cage's draught depth marked on the stakes, making it easy to adjust in time and stabilize the cage depth. Use slip knots for the ropes to make it easy to raise and lower the cage body. </p><p>4) For this fixed-type cage, tie straight strip-like objects along the top and bottom ropes of the cage body; for example, thin bamboo poles can be used for the top and bottom ropes, and iron bars can also be used for the bottom rope, stretching the entire cage flat and straight, avoiding folding of the netting in the water and reducing capacity. Install rings at the four corners of the cage. When in use, fit the rings at the four corners onto the bamboo stakes, and the formed cage will be firmly tied to the bamboo stakes and ready for farming. The rings can also be tied to the bamboo stakes, four on the top and four on the bottom, using pull ropes to control the entire cage body, following the rise and fall of the water level, and adjusting the draught depth of the cage body in time. In places with gentle flowing water, feed is most abundant. When the cage body is flat and straight, the fish are most comfortable. </p>
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What points should be noted in sturgeon fry rearing?
With the vigorous rise of sturgeon aquaculture, the price of commercial sturgeon keeps falling, and the profit margin is getting smaller and smaller. Improving the survival rate of sturgeon fry and fingerlings is one of the main means of increasing profits in sturgeon aquaculture. Farming sturgeon in the south generally requires southward relocation and acclimation, which
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Key Technical Points for Large-Scale Fry Rearing of Pufferfish
Pufferfish eggs are small, with an egg diameter of only about 1.1 mm; the gonadosomatic index is high and the number of eggs carried is large, which creates the prerequisite conditions for large-scale fry rearing. For large-scale fry rearing, the following technical steps should also be well controlled: First, having a sufficient number of broodstock with well-developed gonads is
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