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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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What are the tricks for making money from conventional fish farming?
In recent years, the market price of conventional fish has kept falling, sometimes even approaching the cost price, and fish farmers lose money with the slightest carelessness. Can conventional fish farming still make money? The author visited some large fish farmers with relatively good farming profits and, based on a summary of their successful experience, offers the following 10 production suggestions. 1. Pollution-free farming. With the implementation of the pollution-free agricultural product access system, the production of pollution-free aquatic products will certainly receive great attention. 2. Reasonable polyculture. Generally, there are many wild and miscellaneous fish in adult fish ponds
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What kind of fish is the American flagfish? Let's get to know this fish
The American flagfish, Jordanella floridae, is also known as the flagfish and the star-striped fish. Place of origin: Florida, USA. Appearance: the body grows up to 6 cm long, and its shape resembles a moonfish, but the back and belly are broad, and the caudal peduncle is also wide. The head and snout are bluntly rounded. The outer edge of the caudal fin is straight. The dorsal fin is larger than the anal fin, the dorsal and anal fin edges are curved, and the body color is variable, with red, pale yellow, blue, purplish red and other colors, some deep and some light, some leaning blue or leaning red, and the whole body has more than 10 longitudinal rows of star-spotted stripes, while the dorsal fin is covered with dark star spots; its star-spotted stripes closely resemble the stars-and-stripes pattern of the American flag, which is how it got its name. Habits
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What kind of fish is the pond smelt? Characteristics and habits overview
(Osmeridae) Hypomesus oidous [local name] cucumber fish. [Morphological characteristics] Small fish, generally 6-8 cm in body length. Body elongate and laterally compressed. Head length greater than body depth. Snout terminal, mouth cleft relatively large, upper and lower jaws with villiform teeth, maxilla extending to below the eye. Eye present, eye diameter equal to snout length. Dorsal fin tall, its height greater than body depth, opposite the pelvic fins. Adipose fin present. Pectoral fins small. Caudal peduncle very slender, caudal fin deeply forked. Back light grass green, sides of body silvery white, scale edges with small dark spots. Fins grayish black
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What are the common mistakes in the use of fish medication?
In aquaculture, improper use of fish medication commonly causes losses. Fishermen and farmers should pay attention to this. 1. Treating without matching the disease. Some fishermen and farmers use bleaching powder, trichlorfon or copper sulfate for prevention and treatment no matter what fish disease occurs. Failing to prescribe the right medicine for the disease not only fails to prevent and treat the fish disease, but sometimes even has the opposite effect. 2. Using the same medication regardless of fish size. Some fishermen and farmers, upon seeing an outbreak of fish lice disease, spray 2.5% trichlorfon over the whole pond, yet do not realize that this
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What are the sensory identification methods for fish diseases?
(1) Intestinal diseases 1. Hemorrhagic disease: The muscles, mouth, and bases of various fins are congested, especially the anal fin. After peeling off the skin, pinpoint hemorrhages in the muscles are visible; in severe cases, the entire muscle turns red. Sometimes the operculum, lower jaw, orbital area, and intestines of sick fish also show congestion; the gills lose their bright red color or become pale. 2. Enteritis disease: The anus is red and swollen; in severe cases, pressing the abdomen gently causes pus and blood or yellow mucus to flow from the anus, and part or all of the intestine is inflamed, appearing purplish-red. 3. Coccidiosis: The gill filaments are pale; in severe cases, the abdomen is slightly
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Detailed Explanation of the Recipe and Cooking Techniques for Red Pine Mandarin Fish
Cooking category: Pan-fried; Cuisine: Anhui cuisine; Ingredient category: Fish; Flavor: Savory sauce; Suitable season: Any; Color, aroma and taste: The fish flesh is white, salty and fresh, the minced pork is red and fluffy, one dish with two flavors. Main ingredients: one fresh live mandarin fish, 50 of leg meat, egg white, cilantro leaves. Auxiliary ingredients: Shaoxing wine, refined salt, MSG, white sugar 1, chicken broth, tomato paste, dry starch, water starch, peanut oil. Preparation: 1) Clean the mandarin fish, cut off the fish head, then use a knife along both sides of the spine to cut flat to the tail, chop off the spine, remove the chest bones
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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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A Detailed Guide to Fish Smoking and Roasting Methods and Techniques
1. Smoked fish. The raw materials for smoked fish are mostly medium-sized fish such as black carp and grass carp, but carp, silver carp, pomfret and other fish can also be used. Through processing, they are made into tasty convenience foods. The production method is as follows: ① Splitting and cutting. After selecting the fish, wash them clean with water, scrape off the scales, trim off the fins, slit open the belly, and remove the internal organs. But do not puncture the gallbladder, to avoid making the flesh bitter. Then use a cloth rinsed in hot water to wipe away the blood stains, black membrane and so on inside the abdominal cavity. Next, cut open the fish head so that the fish body becomes a flat piece. For larger black carp, after removing the head,
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Common Disease Prevention and Control Methods and Key Technical Points for Walking Catfish
I. Trichodiniasis: Large numbers of Trichodina (parasites difficult to see with the naked eye) attach to the gill filaments, damaging gill tissue, affecting respiration, and causing fry to suffocate and die. Prevention and control methods: (1) Per cubic meter of water, use 0.5 g copper sulfate and 0.2 g ferrous sulfate (or 0.7 g copper sulfate alone), dissolve in 40-50°C warm water, and splash over the entire pond. (2) Per cubic meter of water, use 0.5 g of 50% amobam, dissolve in water, and splash over the entire pond. II. Gyrodactyliasis and Dactylogyriasis: These two parasites attach in large numbers to the gills and secrete large amounts of mucus, hindering
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