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How to judge the severity of fish gasping at the surface
To judge the severity of fish gasping at the surface, the main criteria are the time when the fish begin to gasp, the location of the gasping, the size of the water surface area where they gasp, and the species of fish gasping. 1. Dark gasping. This generally occurs when it is already daylight but the sun has not yet risen; the fish move about on the water surface in the center of the pond and on the upwind side, and bursts of splashing water can be seen. At this time the dissolved oxygen content of the pond water is 2-3 mg/L, which is normal gasping. 2. Light gasping. This mostly occurs at dawn; the fish are on the water surface in the center of the pond and on the upwind side, while wild trash fish gasp at the pond edge.
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How to prevent fish from gasping at the surface? A detailed guide to practical and effective measures
Discharge an appropriate amount of pond water and add fresh water; the suitable time for adding water is around 2-3 p.m. Use aerators reasonably, stop fertilizing, and control fish feeding. Splash quicklime water in small amounts several times to adjust the pH of the water body. Use chlorine dioxide twice in succession to disinfect the water body; before disinfection, an appropriate amount of oxygen enhancer and microecological preparations may be applied.
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Giant Octopus Appears Again, Revealing Its Ferocious Face
For octopus enthusiasts, these days are absolutely worth celebrating! Recently, researchers just released footage they had taken of the giant squid (Architeuthis) glowing in the deep sea (see February 27 issue of Science Times, page A2, "Deep-Sea Squid 'Comes to the Surface'"), and now people have captured the first live specimen of an adult giant octopus (Mesonychoteuthis). According to an online report in the American journal Science, a fishing vessel operating in the waters south of New Zealand recently caught
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Several Causes of Fish Gasping at the Surface and Their Prevention and Treatment Methods
Fish "gasping at the surface" is a phenomenon that frequently occurs in aquaculture production, and it is also an important sign for judging whether fish are diseased and whether water quality has changed. However, many farmers, after discovering pond fish "gasping at the surface," do not understand the cause and simply apply medication based on "experience," which often proves ineffective and may even cause mass mortality. In fact, fish "gasping at the surface" can be caused by multiple factors. According to the cause, "gasping at the surface" can be divided into the following 3 types. 1. Hypoxia-induced gasping. Hypoxia-induced gasping is caused by excessively low dissolved oxygen content in the water, causing cultured fish to swim to the relatively higher surface
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Detailed Explanation of Silkworm Egg Surface Disinfection Technology, a Must-Read for Silkworm Farmers
The purpose of egg surface disinfection is to kill pathogenic microorganisms attached to the egg surface, avoiding disease in newly hatched silkworms caused by eating the eggshell. For spring silkworm eggs, disinfection is best carried out 1 to 2 days before hatching. For autumn silkworms, it is best done on the afternoon 1 day before hatching, and on that same day the eggs are taken directly to the mountain to hatch. First, bathe the eggs in a 0.5% sodium hydroxide aqueous solution at a liquid temperature of 18 to 20°C, washing the eggs for 1 minute to remove the adhesive material on the egg surface. Then rinse clean with water, drain off the moisture, and carry out egg surface disinfection. Mix 36% to 38% formaldehyde stock solution, 36% concentrated hydrochloric acid, and water in a ratio of 1:
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Prevention is more important than treatment in the control of crayfish surface diseases
Crayfish disease control: prevention over treatment, and how to prevent and treat crayfish surface diseases
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What to Do When Fish Gasp at the Surface? Several Situations and Countermeasures
Several Situations of Fish Gasping at the Surface and Countermeasures
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Prevention and Treatment Methods for Bovine Blood-Sweat Disease with Nodules on the Body Surface That Rupture and Bleed
Prevention and Treatment Methods for Bovine Blood-Sweat Disease with Nodules on the Body Surface That Rupture and Bleed
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Crucian carp boil disease causes red, swollen, congested body surface and pus-filled boils. How can it be prevented and treated?
Prevention and treatment methods for crucian carp boil disease with red, swollen body surface, pus-filled boils and congestion
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Reddening of Part of the Body Surface in Shrimp: Prevention and Treatment of Red Body Disease in Pacific White Shrimp
Reddening of Part of the Body Surface in Shrimp: Prevention and Treatment of Red Body Disease in Pacific White Shrimp
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