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Detailed Explanation of Common Disease Prevention and Control Methods for Fish and Crabs, a Must-Read for Farmers
I. Grass carp hemorrhagic disease. Symptoms: bleeding in the fins, mouth, eye sockets, muscles, and intestines, partially or entirely bright red. Prevention and control: 1. Splash dibromohydantoin or chlorine dioxide over the entire pond, using 200 grams of dibromohydantoin or chlorine dioxide per 1 mu of water surface with a depth of 1 m. Apply once more after 2-3 days. 2. Mix Yu'erkang into bait and feed, mixing 1 kg of Yu'erkang per 50 kg of feed, and feed continuously for three days. 3. Mix Suke into bait and feed, mixing 50 grams of Suke per 50 kg of feed, feeding once a day, with three consecutive days as one treatment course. If combined with external use of dibromohydantoin
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How are common general fish medications used? Detailed usage guide
1. Quicklime can be used for pond clearing and disinfection, and can raise the pH of the pond water, improving the pond bottom substrate and water quality. 2. Formalin (formaldehyde) as a 30 ppm solution for a 24-hour soak can kill Trichodina, Chilodonella, Dactylogyrus and Ichthyophthirius, etc.; a 250 ppm soak for 1 hour, or 100 ppm for 3 hours, can treat Gyrodactylus and other protozoa; using a 3%-5% solution to soak spawning nests for 2-3 minutes can prevent saprolegniasis; applied as a mixture with malachite green to the whole pond, it can treat ichthyophthiriasis; 1
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Detailed Explanation of Symptom Identification and Prevention and Treatment Methods for Fish Liver and Gallbladder Lesions
Fish viral diseases, bacterial diseases, nutritional metabolic diseases, water pollution, and long-term high-dose use of the same antibacterial drug can all cause lesions in the fish liver and gallbladder. In particular, second-year grass carp (Ctenopharyngodon idella) have a relatively high chance of contracting this disease, which often causes huge economic losses to aquaculture farmers. 1. Symptoms After fish contract liver and gallbladder disease, their external appearance is usually normal, and the main problems occur in the internal organs. The main symptoms are as follows: 1. Color changes. The liver appears white, pink, earthy yellow, yellow-brown, purple-black, or with red and yellow intercrossing, and may even turn green.
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Detailed Explanation of Fish Roe Processing Methods and Technical Key Points
Before making caviar, fish eggs can be processed into fish roe products. The process is basically the same as that for caviar, except that after the fish eggs are prepared, the roe is not removed but directly subjected to post-processing (post-processing is intended to produce different products such as salted and smoked products). Most fish roe products in the world are preserved by drying or salting. Generally, smoked products must undergo fermentation. That is, after the salted and sun-dried fish eggs are smoked, the separated roe is placed in a barrel, sealed, and stored in a cool environment (13-
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How Do Angelfish Breed? Detailed Breeding Methods and Techniques
Angelfish, English name AngelFish, scientific name Pterophyllum scalare, belongs to the cichlid family and is a quite representative species of fish. Cichlids have a characteristic: when breeding, unless they are naturally paired by mutual affection, they will absolutely not produce the next generation, and they have an innate tendency to care for their offspring. However, when spawning, angelfish are extremely afraid of disturbance. If they are disturbed during paired breeding, the tragedy of eating their own eggs or fry can occur. Therefore, an environment free from external interference during breeding is
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Detailed explanation of large icefish processing technology, mastering the key operation points
Large icefish, also called noodle fish, was originally widely distributed in the main stream and affiliated lakes of the middle and lower reaches of the Yangtze River. Its flesh is tender and delicious, rich in nutrients, and eating it gives a special fresh cucumber-like aroma. Large icefish generally has a body length of about 20 cm, with no bones or spines, and is a small valuable fish with very high economic value, deeply welcomed in domestic and international markets. From 1985 to the early 1990s, the reservoir transplantation and propagation of large icefish was carried out comprehensively across our country and achieved success. Its distribution area is continuously expanding, and output is increasing day by day. How to do a good job in
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Artificial propagation techniques for large icefish: Practical experience from Hongshan Reservoir
Hongshan Reservoir is located in the lower reaches of the Laoha River in the northeast of Chifeng City. It is a large plain-type reservoir integrating flood control, irrigation and aquaculture, with a catchment area of 24,500 sq km and a total storage capacity of 2.56 billion cubic meters. The reservoir's fish-farming area ranges from 80,000 mu to 130,000 mu between the dry season and the wet season. The reservoir introduced fertilized eggs of large icefish in 1995, and the catch reached 2.5 kg/mu in 1998. In the following 2 years the yield declined somewhat, but in recent years, thanks to relatively well-developed propagation management measures, the resource has gradually recovered.
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How to Treat Bulging Eyes in Fish? Effective Methods Explained
Signs of infection One or both eyeballs of the fish bulge out abnormally. (Note: Some fish, especially ornamental goldfish, have bulging eyes from birth.) Affected fish Exophthalmia can affect many pond and aquarium fish. Details of infection The development and contagiousness of the disease depend greatly on the cause, which is often very difficult to determine. Swollen eyeballs can be caused by many factors, including fish tuberculosis, white spot disease, dropsy, worm cataracts (caused by various fluke larvae, such as Diplostomum) and bacterial infections.
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Autumn Prevention and Control Methods for Fish Fulminant Hemorrhagic Disease
Fish are prone to fulminant hemorrhagic disease in autumn. This disease has a sudden onset, spreads quickly, and has a long epidemic duration, with a high mortality rate and heavy losses. Once it breaks out, it is difficult to control, and the condition tends to recur. Fish farmers should strengthen their awareness of prevention to prevent the occurrence of this disease. 1. Disinfection of fingerlings Before fingerlings are stocked into ponds, they must be soaked and disinfected in 1% to 2% salt water. The soaking time depends on the fish's constitution and the temperature. When conditions permit, fingerlings can be soaked with fulminant hemorrhagic disease vaccine. 2. Timely water exchange and oxygen enhancement The water quality must be kept fresh,
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Home-style recipe for celery and yellow fish shreds, tender and refreshing, perfect with rice
Ingredients: one fresh live carp, celery, chili pepper, egg white. Method: 1. Slaughter the live carp, remove scales, gills and internal organs, wash clean, wipe dry, split open and remove the bones, then cut the pure fish flesh into shreds about 7 cm long. Mix egg white and dry bean starch evenly, add cooking wine and salt and mix well, then blend with the fish shreds. 2. Cut the celery into sections about 7 cm long, remove the seeds from the pickled red chilies and cut into shreds. Mince the ginger and garlic into fine pieces. Mix soy sauce, white sugar, vinegar, monosodium glutamate, sesame oil and water bean starch with good stock to make a thickened sauce. 3. Place the wok over high
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