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Techniques for Pure Freshwater Farming of Whiteleg Shrimp
Abstract Stocking shrimp larvae: Select shrimp larvae that are highly active, strong in adapting to water, with a transparent body, no blackening on the gills, and with the black umbrella fully open, and stock them in a pond with a water temperature above 20°C. Strict desalination and nursery rearing: In the early stage of farming, the shrimp larvae must be gradually desalinated
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Industrialized Seedling Rearing Technology for Whiteleg Shrimp
Abstract Whiteleg shrimp farming requires thorough knowledge of broodstock rearing, broodstock gonad maturation, induced mating and spawning, fertilized egg collection and hatching, larval rearing conditions, and seedling management techniques. To achieve fast shrimp growth, strict requirements apply to water quality, stocking density, pond water depth, and feed feeding.
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Detailed Explanation of Key Technical Points for Freshwater Farming of Whiteleg Shrimp (Litopenaeus vannamei)
Abstract The most suitable water temperature for the survival of whiteleg shrimp is 28-32°C. Release them when the weather is clear or in the evening; the most suitable water temperature for releasing fry is 20°C or above. Select high-quality fry with good vitality, quick responses, and a transparent body. Before releasing them into the freshwater
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Freshwater Farming Techniques for Whiteleg Shrimp (Litopenaeus vannamei) and Treatment of White Feces Disease
Abstract Pond: mud-sand bottom, water depth about 2 m, inlet filtered with 60-mesh silk gauze. Seedstock: use fully desalinated shrimp fry, turn on the aerator the day before stocking, and release a small number of test shrimp before stocking the fry in large quantities. Feed: fixed times and amounts, fixed spots and quality, small amounts given frequently,
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Prevention and Treatment Methods for Several Gill Diseases in Whiteleg Shrimp (Litopenaeus vannamei) Farming
1. Gill disease caused by Vibrio. Diseased shrimp float and swim slowly on the water surface, with gill filaments slightly swollen and dark gray, showing degeneration and necrosis at the tips. Under high magnification, actively motile bacterial cells can be seen. Ponds where this disease occurs have severely polluted bottom sediment and poor water quality, and the disease peak season is from July to September.
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Prevention and Treatment of Muscle Opacity Disease and Cramp Disease in Whiteleg Shrimp Farming
Muscle opacity disease: Causes: Sudden temperature changes are the main cause, whether the temperature is too high or too low; Vibrio infection or sporozoan parasites in the muscle. Symptoms: The muscle of the last one or two abdominal segments turns white and loses its transparency; in individual diseased shrimp the whole body turns white, and microscopic examination shows the whitened muscle is already necrotic, with disordered muscle fibers and indistinct striations.
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Control Methods for Taura Syndrome in Whiteleg Shrimp
Taura syndrome is caused by infection with Taura syndrome virus, also known as red body disease (typically, viral infection causes the body to turn red while the appendages do not; bacterial infection causes the appendages to turn red while the body does not; when both the body and appendages turn red, it may be a mixed infection). Sick shrimp stop feeding and swim slowly at the water surface
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Common Abnormal Phenomena in Whiteleg Shrimp Farming and Their Management
Abnormal phenomenon 1: Before stocking, the pond water cannot be fertilized despite repeated fertilization, or the water color is very poor. (1) Causes: Serious exceedance of toxic substances such as heavy metal ions, or massive reproduction of harmful bacteria and zooplankton in the pond, or growth of filamentous algae and blue-green algae (qingni moss) in the pond,
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Prevention and Control Measures for White Spot Syndrome in Whiteleg Shrimp Farming
1. Main symptoms. Sick shrimp lose appetite, reduce or stop feeding, have empty stomachs, move sluggishly, jump weakly, lie still or swim abnormally; in the late stage of the disease, white spots appear on the subcutaneous shell and appendages of the shrimp body, softening of the shell is also common, and the carapace is easily peeled off
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Artificial breeding techniques for whiteleg shrimp (Litopenaeus vannamei) farming
The whiteleg shrimp (Litopenaeus vannamei) is native to the area around Ecuador in South America. It was first introduced to China from the Americas in 1988, and it is one of the three most heavily farmed shrimp species in the world by production volume known to date. Compared with the Chinese white shrimp, the whiteleg shrimp has a longer breeding season, a shorter larval rearing period,
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