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What are the feeding methods for fish feed? A detailed explanation of feeding techniques for various fish
Feed is one of the biggest costs in fish farming. Using scientific feeding methods not only benefits the healthy growth of fish, but also saves feed and effectively improves fish farming efficiency. 1. Pellet feed: The diameter of fish pellet feed is usually 2.5-8 mm, and the length is 5-10 mm. It can be directly scattered into the fish pond for feeding. If the feed is damp, do not feed it directly. First dry it in the air or in the sun, and then feed it; if the feed has spoiled, it should not be fed again to prevent fish from being poisoned after eating it. 2. Cake-type feed: Cake-type feed
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How do pufferfish breed? A detailed explanation of breeding methods and techniques
1. Selection of broodstock: The broodstock selected must be strong, with fully mature gonads, and the female and male broodstock used must be in heat at the same time. The broodstock must have the characteristics of the species, and the female and male broodstock should normally appear affectionate with each other. Avoid selecting tropical fish from the same brood or with close blood relations as broodstock, to prevent inbreeding from causing degeneration in the quality of the offspring. Tropical fish with torn fins, disabilities, or deformities should not be used as broodstock. 2. Preparation of the breeding tank: Because broodstock species differ, the breeding tank also differs. Generally, for tropical fish that lay floating eggs
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Technical Analysis of Adjustments to Beam Trawl Fishing Gear and Methods
At present, beam trawl shrimp trawling has become one of the important operating methods of marine fishing in coastal fishing areas, and its output value as a proportion of the total marine fishery output value has risen year after year. Since this operating method belongs to single-boat bottom beam trawl operation, its gear design, rigging, operational adjustment, and fishing ground selection and other stages are all fairly highly technical, so even a slight oversight can affect shrimp trawling production. In particular, the adjustment techniques in beam trawl operation are the key to fishing production technology. For example, in production practice everyone often encounters this phenomenon: the same
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What pathogenic effects does feed contamination have on fish?
Because some feed products currently contain bacteria at levels far exceeding the standard, mass fish deaths occur from time to time after fish eat contaminated feed. Based on the disease symptoms in fish, it can be roughly divided into two types: acute type (explosive) and chronic type. 1. Acute type (explosive type): After fish eat contaminated feed, disease onset occurs in as much as 3 to 5 days, or as little as 1 to 2 days, with symptoms appearing; severely affected fish have already died, and the number of dead fish shows a gradually increasing trend, but feeding is not affected, and most fish can eat normally. This kind of
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Yellow catfish is a high-quality aquaculture species worth promoting
Yellow catfish, also known as jiangsang, gayazi, and angsi fish, has a yellow-green back, yellow flanks with intermittent black patches, a naked scaleless body, and an elongated shape. It is distributed in natural waters across most regions of China. Yellow catfish is a warm-water bottom-dwelling fish that prefers to inhabit still or slow-flowing waters. Its survival temperature is 0°C-38°C, it has extremely strong adaptability, and it has considerable aquaculture potential, so it can be promoted for farming in most inland waters nationwide. Yellow catfish has tender flesh and a delicious taste. It not only has nourishing effects, but also certain
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Six precautions for catching adult fish during high-temperature periods
Production practice has proven that catching adult fish during the hot season should be done at night or in the early morning (before dawn), when the temperature is relatively lower, which helps keep the fish fresh. When catching, the following points should be noted: 1. If using a seine net to catch, preparation work should be done during the day, clearing away debris on the water surface of the fish pond that hinders seining. 2. If using a soft vinylon fishing net, the height of the net should match the water depth of the fish pond as closely as possible. If using a nylon net to catch adult fish in a relatively large fish pond, the mesh size should be about 8 cm; this way
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How to Handle Sick Fish? The Correct Methods Every Breeder Must Know
If you notice abnormal signs in tropical ornamental fish such as loss of appetite, listless swimming, abnormal body color, or a white film growing on the body, these are all warning signs of illness! When you find ornamental fish suspected of being sick, you should scoop them out of the aquarium as early as possible and place them separately in another aquarium for isolation and treatment, to prevent the disease from spreading! At this time, note the following: 1. When scooping fish, move gently (to avoid the fish struggling in fright, which could spread the pathogens, and to avoid injuring the fish's body); 2. When isolating, be sure to use the original water (putting a sick fish into new water will instead lower the sick fish's resistance)!
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What causes protruding eyes in fish
(Exophthalmus) Signs of infection One or both eyeballs of the fish protrude abnormally. (Note: Some fish, especially ornamental goldfish, have protruding eyeballs from birth.) Affected fish Exophthalmus can affect many pond and aquarium fish. Details of infection The development and contagiousness of the disease depend greatly on the cause, and the cause is often very difficult to determine. Swollen eyeballs can be caused by many factors, including fish tuberculosis, white spot disease, dropsy, worm cataract (caused by various trematode larvae, such as Diplostomum) and bacterial infection.
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How to cook long-snout catfish deliciously? Home-style recipe for steamed long-snout catfish with rice powder
Cooking category: Steamed dishes Cuisine: Anhui cuisine Ingredient category: Fish Taste: Light Suitable season: Summer Color, aroma and taste: Steamed wrapped in lotus leaves, filling the air with a delicate fragrance, the fish is plump and tender, making it a summer seasonal dish. It also has the effects of tonifying the middle and boosting qi, strengthening the spleen and opening the appetite, and clearing yin. Main ingredients: long-snout catfish, fried japonica rice powder, lotus leaves Auxiliary ingredients: Shaoxing wine, soy sauce, doubanjiang, salt, sugar, scallion, ginger, sesame oil Method: 1) Clean the long-snout catfish, remove the flesh from both sides, and cut into small oblong
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Preventive disease measures must be taken before fish storage and transport
As the saying goes: "Buy a chicken that can crow, buy a fish that can jump." Yet many fish farmers, after a year of hard work, run into trouble when the time comes to sell adult fish: the fish do not tolerate storage and transport, their whole bodies become congested, and some even die. At this point most farmers think there is a problem with the feed. Indeed, some feed manufacturers, in order to one-sidedly lower the feed conversion ratio and increase fish growth rate, add hormones or hormone-like drugs such as olaquindox to the feed, causing the above phenomena during fish storage and transport. But fish not tolerating storage and transport
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