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How to Tell Male and Female Zebrafish Apart? A Detailed Guide to Sex Identification and Breeding Methods
Telling male and female zebrafish apart is not difficult: male zebrafish have a slender body, large fins, a yellowish body color, a brownish-yellow anal fin, and prominent stripes; females have a more plump body, a paler, bluish body color, a pale yellow anal fin, and an obviously swollen belly during the egg-bearing period. Zebrafish are egg-laying fish and reach sexual maturity at 4 months of age; generally, 5-month-old fish are better for breeding. Zebrafish are relatively easy to breed. The breeding water requires a pH of 6.5-7.5, a hardness of 6-8, and a water temperature of 25-26°C. Zebrafish most prefer
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Several Simple Preparation Methods of Green Fish Medicines
In the prevention and treatment of fish diseases, if local green plants or Chinese medicinal herbs can be used to prepare fish medicines, it can not only prevent and treat common diseases such as red-skin disease, enteritis, and gill rot, but also save costs. Several simple preparation methods of green fish medicines are introduced below: 1. Sanhuang powder: prepared from rhubarb, Phellodendron amurense (Amur cork tree bark), and Scutellaria baicalensis (Baikal skullcap) in a ratio of 5:3:2. When in use, add 1 kg of "Sanhuang powder" and 0.4 kg of table salt to every 10 kg of fish feed, add an appropriate amount of water, and make granular medicated bait for feeding. Once a day, for 5 consecutive days; the treatment effect is significant in the early stage of the disease.
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Detailed Explanation of Key Technical Points for Autumn Fish Fry Cultivation
Autumn water temperatures are suitable, making it a great season for rapid growth of fish fry. Doing a good job of autumn fish fry cultivation is crucial. The key technical points for autumn fish fry cultivation are as follows: 1. Pond clearing. After 2-3 months of fish fry cultivation, pond water quality deteriorates, natural food decreases, and harmful substances and pathogenic bacteria increase. Therefore, after the beginning of autumn, fish fry should be transferred to ponds that have been cleared and disinfected for cultivation. Under conditions where water sources and fish ponds are relatively insufficient, all fish fry can be transferred out for temporary holding, and the original fish fry pond can be disinfected with 75-100
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Techniques for the Four Key Periods of Yellow Catfish Farming
Carrying out yellow catfish farming in lakes, reservoirs, ponds, rivers and other water bodies can effectively utilize the water body and obtain relatively high economic benefits, and is an effective way for the vast number of farmers to adjust their planting and breeding structure and increase income. However, because the yellow catfish has omnivorous feeding habits, broodstock cultivation is quite difficult, and it is a scaleless fish with different requirements for feed and farming management at different growth stages. To achieve high yield and high efficiency in farming, one must master the farming techniques for four key periods. 1. Broodstock cultivation period 1. Broodstock collection As broodstock, fish are required to have bright body color, a plump body shape,
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An introduction to the characteristics and advantages of the high-quality fish species ayu
The ayu (Plecoglossus altivelis) belongs to the class Osteichthyes, order Salmoniformes, family Plecoglossidae. It is an important small, valuable economic fish in China. Its flesh is tender and its body color is beautiful, and along its dorsal ridge runs a cavity filled with aromatic fat that gives off an enticing delicate fragrance, hence its name. After being dried over fire, the ayu turns golden yellow, excellent in color, aroma and taste, with a unique flavor, and is known as one of the "Five Treasures of Yandang." The ayu is a sub-cold-water fish, preferring to inhabit medium-sized sea-connected rivers with clear water, swift currents, relatively low water temperatures and gravelly riverbeds. It is characterized by a short food chain, fast growth, and adaptability to temperature
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How to steam fish without the fishy smell? 4 practical methods to remove the fishy smell
When making steamed fish, if it is not prepared properly and the heat is not right, the fish meat will look dull, and the texture will be coarse and fishy. To make delicious steamed fish, you need to master the following 4 tips: 1. Drain all the blood. For steaming a live fish, you must first strike the fish head hard with the flat of the knife to stun it; and bleed it from the gills so that the capillaries in the fish meat do not take in fish blood. This way the steamed fish meat will be white as jade, with no fishy smell at all; otherwise, the fish meat will not only be dull, but also very fishy. 2. Soak in hot water. After the live fish is gutted, scaled
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What are the four key points to get right for fish farming at the start of spring?
1. Fertilization: In early spring, when the pond water temperature stabilizes at 8°C-10°C, start applying supplemental fertilizer to cultivate natural food organisms in the water. The amount of fertilizer should be determined according to the fertility of the water quality and the quality of the fertilizer. Generally, apply 60-90 kg of human excrement and urine per mu; or 100-150 kg of livestock manure. If chemical fertilizer is used, follow a nitrogen-to-phosphorus-to-potassium ratio of 1:1:0.5. When applying, first crush and mix with water, then splash evenly over the whole pond, with a total amount of 3-7 kg per mu, and an interval of 5-10 days between each application. Keep the pond water quality yellow-brown or yellow-green, with a transparency of 30 cm
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Old-Style Braised Fish
〔Main and auxiliary ingredients〕Clean black carp flesh..500 g Shaoxing wine.....50 g Soy sauce.....75 g White sugar.....40 g Chopped scallion.....8 g Chopped ginger.....3 g Water starch....10 g Sesame oil....5 g Lard....75 g 〔Cooking method〕1. Cut the black carp flesh into fish pieces, about 10 cm long, about 2.5 cm wide, and about 1.5 cm thick. 2. Heat a wok over high heat, ladle in the lard, add the chopped scallion
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What kind of fish is the Singapore red tilapia? An introduction to its breed characteristics
Singapore red tilapia: it is a red tilapia selected and bred from Southeast Asian strains. Its body shape resembles that of Nile tilapia or hybrid tilapia, with a high back, large and transparent scales, and a pink or orange-red body color. The red color rate is over 99%, and the body color segregation rate in its offspring is low. In winter during low-temperature seasons, adult fish may turn gray, but after the water temperature rises and the fish are cultured for a period of time, they can revert to red. Among red tilapia, this fish has the fastest growth rate and a large individual size. Fry of the year can grow to more than 500 grams, and sexually mature individuals reach 350 grams. It also has a white peritoneum and particularly tender flesh, making it an excellent aquaculture variety worth promoting.
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Methods and techniques for stocking fish fingerlings in early spring
Early spring is the best season for stocking fish fingerlings, because during this period the water temperature is relatively low, the fish's activity is reduced, and the fish scales are tight, the fish body is firm, and they are not easily injured during netting, catching and transport, which can increase the survival rate of stocked fingerlings. When stocking fingerlings, attention should be paid to the following aspects: fingerling quality - fingerlings of the same species and same age should be uniform in size, with little difference in body length and weight, thick back muscles, bright coloration, scales and fins intact without damage, swimming actively and normally, strong upstream-swimming ability, and after being taken out of the water and placed in a basin, the gill covers do not open and the tail
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