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Detailed Explanation of Silverfish Processing Technology and Key Operational Points
Through processing, silverfish can be turned into high-quality fish products that sell well in domestic and international markets, increasing the value of silverfish and thereby enabling the fishery to achieve high economic returns. Therefore, processing is an important component of silverfish and the fishery industry. Because silverfish have a relatively high protein content, the catch spoils easily, requiring that ice be used to keep it fresh during the purchasing and processing stages. At present, silverfish products in China are mainly processed according to export standards into packaging units of 1000 grams, and there are also domestic-sale products processed into 500-gram, 250-gram, and 1
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What are the precautions before fish farming
1. Diversify the shape of fish ponds: Fish ponds are often rectangular or dug-pond style, so as to give full play to the three-dimensional benefits of the aquaculture water body. The area of a single fish pond is generally about 0.067 hectares (mu, the same below), the pond depth is 2.5-3 m, the length-to-width ratio is 5:3, and the side slope coefficient is 2-3. In construction and shaping, it is possible to start with the easy and then the difficult, and build some transitional fish ponds, such as "concentric"-shaped, high-low type, "grid"-shaped, "field"-shaped and other shapes, among which the "concentric"-shaped fish pond is the most ideal transitional fish pond. 2. Promptly provide a matching irrigation and drainage system: requirements
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Analysis of the Causes of Explosive Fish Mortality and Prevention and Control Measures
2. Countermeasures for bacterial and parasitic diseases. For bacterial diseases, the main approach is to control the reproduction of pathogenic bacteria in the pond water and keep their numbers below the disease-causing threshold. This requires routine regular disinfection, using "Yujunjing", "Yujunjing No. 2", "Jundi" or strong chlorine powder once every 7-10 days to prevent excessive reproduction of pathogenic bacteria. After a bacterial disease occurs, disinfect continuously 2 times with a disinfectant, and at the same time mix drugs such as "Chuxueping", "Jingbo Baoxueping", "Yubingkang", "Yufubao" or "Jianyule" into the feed
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What are the methods for buying and transporting fish?
To get fish from a trusted source, verify whether the dealer follows proper quarantine procedures, and check whether the fish in the container look healthy. Unhealthy fish may hang upside down in the group and respond sluggishly to a gentle tap on the aquatic plants (dealers do not agree with this point). Only a small number of fish are bred and sold locally; most fish are shipped by air over considerable distances, so the final health of the fish depends to a large extent on handling before and after transport. Nowadays airlines are quite
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Fish heads contain substances that can fight against human aging
Professor Wang Cunxin, a fish research expert at the Institute of Oceanology, Chinese Academy of Sciences, says that fish brains contain a kind of fish oil needed by the human body, and fish oil is rich in highly unsaturated fatty acids, whose main component is what we call "brain gold." This is an essential nutrient for humans, mainly present in the phospholipids of the brain, and it can maintain, enhance and improve brain function. If intake is insufficient, the brain development process of infants will be hindered. Therefore, there is a saying that eating more fish heads can make people smarter. Professor Wang says that other parts of the fish head have no special nutritional
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What food do angelfish eat? A detailed guide to feeding methods
At first glance, angelfish have small, delicate mouths, but they are actually very cunning. When angelfish eat their food, their mouths protrude into a tube shape, sucking it in along with water like a straw. Their suction is very strong; taking an angelfish with a body length of 10 cm as an example, it can suck in a fish about 1 cm long in one go. Once angelfish reach their maximum size, it is best not to keep them together with small tetras, and especially not with black-shell shrimp, which are even more of a meal for large angelfish. Tubifex worms are about 5 cm long, and tubifex worms living in water
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How to raise yellow catfish? All the key techniques are here
To farm yellow catfish well, the key work lies in doing a good job of pest and disease control for yellow catfish, and the following work should mainly be done well. 1. Do preparatory work in winter. Before stocking fry, both new and old ponds must be cleaned and disinfected. Old ponds should have excess silt removed, and it is enough to retain a 10 cm thick silt layer. Every winter, after the fingerlings are merged into ponds or the adult fish are harvested from the ponds, drain the pond water, clean up the sludge at the bottom of the pond and repair the pond embankments, and let the pond be exposed to the sun until it cracks. (1) Pond clearing. ① Dry pond clearing: first drain the pond water (or leave water 6-9 cm deep), and use 75-100 kg of quicklime per 667 sq m (1 mu), increasing or decreasing according to the amount of sludge at the bottom of the pond. When clearing the pond, first add water to the quicklime to make a milk of lime, and immediately sprinkle it evenly over the whole pond without waiting for it to cool. After pond clearing, the efficacy of the lime generally disappears after 7-10 days, and then fish can be released. ② Clearing the pond with water: when the water depth is about 1 m, use 125-150 kg of quicklime per 667 sq m for disinfection. The disinfection method is the same as the dry pond disinfection method, and its disinfection effect is better than the dry pond method. (2) Clearing the pond with bleaching powder. Generally, bleaching powder contains about 30% available chlorine, and its dosage is 15 kg per 667 sq m. First dissolve the bleaching powder in water, then sprinkle it over the whole pond. Generally, after 4-5 days the efficacy completely disappears, and then fish can be released.
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Key Technical Measures for Stocking Fish Fry in Winter
As the saying goes, "Stock fish fry in spring and they catch disease; stock fish fry in winter and they grow three fen." Practice has proven that the period from the Winter Solstice to the Start of Spring is the best time to stock fish fry. There are three reasons: first, the fry are plump and firm-scaled at this time, with strong adaptability. Second, the low water temperature weakens the fish's activity, resulting in a high survival rate during catching and stocking. Third, it avoids the trouble of merging ponds for overwintering, allowing the fry to be dispersed and intensively reared earlier, promoting early spring growth. 1. Pond renovation. Use the idle winter season to renovate fish ponds: turn small ponds into large ones, stagnant ponds into aerated ones, and shallow ponds
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How to make Sixi Fish Rolls? A detailed step-by-step guide
[Features]Bright in color, delicate in texture, fresh and savory in taste, and beautiful in shape. [Ingredients]750 grams of flounder. 30 grams of minced fatty pork, 20 grams of yellow cake crumbs, 20 grams of soaked shiitake mushroom crumbs, 15 grams of ham crumbs, 15 grams of green vegetable crumbs. 5 grams of refined salt, 15 grams of Shaoxing wine, 15 grams of chopped scallion, 3 grams of pepper powder, 50 grams of starch, 10 grams of sesame oil, 100 grams of clear broth, 5 grams of cooked chicken oil. [Production process]Wash the flounder flesh and cut it into eight strips 10 cm long and 2.6
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Is the mass fish die-off caused by lack of oxygen
Characteristics of tilapia hemorrhagic disease: The epidemic season is long, with June to September being the outbreak season of the disease. When the disease occurs, the water temperature is mostly above 25°C. The mortality rate is high; during the epidemic period, the incidence rate can reach 50%-70%. According to reports, the mortality rate can reach 30%-90%, or even total loss. The disease has acute and chronic types. Acute cases mostly die within one week, while chronic cases last as long as two to three weeks or even two months. The affected water areas are extensive; both pond culture and reservoir cage culture can be affected. Symptoms: Ac
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