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Common Disease Prevention and Treatment Methods and Key Technical Points for Fish and Crabs
I. Grass carp hemorrhagic disease. Symptoms: bleeding in the fins, mouth cavity, eye sockets, muscles, and intestines, partially or entirely bright red. Prevention and treatment: 1. Broadcast dibromohydantoin or chlorine dioxide over the entire pond, using 200 grams of dibromohydantoin or chlorine dioxide per 1 mu of water surface at a depth of 1 m. Apply once more after 2-3 days. 2. Mix into bait and feed Yu'erkang, mixing 1 kg of Yu'erkang per 50 kg of feed, and feed continuously for three days. 3. Mix into bait and feed Suke, mixing 50 grams of Suke per 50 kg of feed, feeding once a day for three days as one treatment course. If combined with external application of dibromohydantoin,
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How to rescue pond fish after ammonia-nitrogen poisoning?
When carp, grass carp, bream, white pomfret, crucian carp, etc. are fed with pelleted feed, because the feeding amount is large, excrement and leftover feed increase, and the nitrogenous substances produced by protein decomposition increase accordingly. If even slightly careless, these fish will suffer ammonia-nitrogen poisoning, which at best affects normal growth and at worst causes the death of the fish. The identification and rescue methods for ammonia-nitrogen poisoning in pond fish are described below. I. Identification of poisoning 1. Occurrence characteristics. Ammonia-nitrogen poisoning has no distinction of season, morning or evening, or good or bad weather, and is mostly seen in adult fish
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Many difficulties in large-scale farming of yellow catfish, polyculture models work better
The yellow catfish is a benthic omnivorous fish, with tender flesh, rich nutrition and extremely high economic value, making it a farming species with great market potential. The yellow catfish has strong adaptability and grows slower than cyprinid fish, but grows relatively fast for the species itself; fry bred in the same year can reach marketable size within that year, and the population yield is relatively high. Because large-scale artificial farming currently faces certain difficulties, carrying out polyculture has become imperative. Polyculture of yellow catfish in fish ponds has the following advantages: first, it can feed on low-value small miscellaneous fish and shrimp in the pond,
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High returns from the grid-pool fish-lotus polyculture model
The grid-pool fish-lotus polyculture technique involves partitioning a hardened lotus pool with roof tiles, hard boards and the like into small grids of 2-4 sq m each, planting lotus within the grids, yielding an average of 0.5 wan kg of lotus and 400-450 kg of fish per mu of water surface, with a net return of over 10,000 yuan per mu. This technique can make use of waste pits, wasteland, river beach land and scattered corner plots to build grid-pool fish-lotus polyculture systems; it features small investment, low cost, quick returns and high benefits, is suitable for vigorous development by countless rural households, and has very broad prospects for extension.
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Fish stocking should be arranged reasonably according to water body conditions.
During a "science and technology to the countryside" activity, the author learned that many fish farmers have had unsatisfactory yields and profits over the years in pond fish farming. The main reasons are that the fish stocked were not reasonably matched according to the feeding habits and behaviors of the fish, the varieties stocked were single, the quantities were too high or too low, and the sizes were small. This situation exists to some extent all over the country. The end of the year and the beginning of the year is the season when large quantities of fish are stocked in various places. In order to make full use of the water body, stock fish reasonably, and increase the yield per unit area of the water body, the key points for reasonably stocking fish according to local water conditions are as follows.
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Home-style recipe for ribbon fish head, easy to learn in a few simple steps
Cuisine: Sichuan cuisine Ingredients: top-quality silver carp head, premium Wulong sweet potato starch noodles, authentic Jinhua ham, Pengzhou pickled mustard greens and other ingredients. Although the preparation of this dish is not complicated, the key lies in controlling the heat. Method: First, stir-fry the pickled mustard greens, pickled chili peppers and Sichuan peppercorns in hot oil until fragrant, then add stock and simmer to bring out its fresh aroma. Next, put the cleaned silver carp head into the pot and simmer until it is medium-rare, then add an appropriate amount of sweet potato starch noodles. After a few minutes, a delicious, fragrant, hot-and-sour fish head soup is ready.
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How to Improve Fish Body Resistance? A Detailed Guide to Practical Methods
In recent years, with the expansion of farming scale, the increase in farming output and the deterioration of the farming environment, diseases of farmed aquatic animals have become increasingly serious, restricting the improvement of farming output to a certain extent. At present, under artificial farming conditions, it is unrealistic to control and eliminate all pathogens. To control the occurrence of fish diseases, the author believes that the first step is to start with improving fish body resistance, supplemented by drug treatment, and the effect will be better. Below are several methods for improving fish body resistance, for reference. Stocking superior varieties is the first choice for improving fish body resistance
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Symptoms and Treatment Methods for Gill Curling, a Common Disease in Fish
The arowana is a very beautiful ornamental fish, but it is very prone to gill curling, which is the rolling up of the soft tissue at the end of the gill cover. Although this disease is not fatal, it affects the fish's appearance, so it must be treated. The main cause of gill curling in arowanas is water quality problems, often caused by insufficient dissolved oxygen in the water and improper water changes leading to difficulty breathing in the arowana. The first solution is to improve the aquarium's filtration system to increase the dissolved oxygen in the water; the second is to install a wave-making pump in the aquarium to strengthen the water flow speed inside the tank,
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Home-style recipe for steamed Jiali fish, simple and delicious
Cuisine: Fujian cuisine [Ingredients]1 fresh Jiali fish (about 1000 g), 15 g preserved winter vegetable, 12 g white scallion, 5 g shredded ginger, 25 g Shaoxing wine, 10 g white soy sauce, 4 g monosodium glutamate (MSG), an appropriate amount of meat stock. [Method](1) Remove the scales, gills, and internal organs from the Jiali fish, then wash it clean. Make 3 horizontal cuts on each side of the fish's back and place it in a bowl. (2) Cut the white scallion into 6 cm long sections, soak and wash the preserved winter vegetable clean, spread them together with the shredded ginger over the fish, then add the meat stock, Shaoxing wine, and white soy sauce
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Efficient Fish-Clam Polyculture Methods and Key Technical Points
In 2004, I conducted a pond fish-clam polyculture experiment and achieved relatively good economic benefits. The farming details are described as follows. I. Experimental Materials 1. Preparation of farming ponds Two standard ponds excavated from low-lying fields were selected (having been used for fish farming for three years), with a total area of 10.2 hectares, pollution-free, facing the sun, well ventilated, oriented north-south, rectangular in structure, with an average water depth of about 2 m. Water intake and drainage were convenient, with abundant water sources and good water quality. 2. Pond clearing and disinfection One week before stocking fish and clams, on a sunny day, for each
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