Aquaculture Lists
-
Improvement of body color of adult eel
Eel body color plays an important role in sales. Raising eels with good body color is eagerly expected by all farmers, and it is also a subject that many feed factories have been exploring. In order to solve the problem of eel body color, we must first understand the causes and influencing factors of eel body color. The body color of eel is mainly caused by many factors, such as carotenoid, melanin, pterin and guanine. Factors affecting the body color of eel 1. Oils and antioxidants in feed
2019-01-16 -
Prevention of fulminant hemorrhagic disease of fish in autumn
Fish are easy to suffer from fulminant hemorrhagic disease in autumn. the disease has the advantages of acute onset, rapid transmission, long epidemic time, high mortality and great loss. Once the disease is difficult to control, the disease is easy to repeat, fish farmers should enhance the awareness of prevention to prevent the occurrence of the disease. 1. Fish species must be disinfected with 1% to 2% salt water before entering the pond, and the bath time depends on the physique and temperature of the fish. When conditions permit, the fish species can be soaked with fulminant hemorrhagic disease vaccine. Change water and increase oxygen at the right time to keep the water quality fresh
2019-01-16 -
Examples of Silver Carp and Bighead Carp Culture in Cage
The number of fish stocking in cages is reasonable and correct, and should be determined according to specific conditions. Generally speaking, running water, high dissolved oxygen in the water cage, can be put more. The water body is stable, the wind wave is small, and the oxygen in the water body is small. That is to say, the oxygen in the cage can make each fish have great satisfaction, that is, the limit of stocking quantity. If oxygen does not meet the fish's needs, it means overstocking. In fertilizer water (transparency is 25~30 cm) at the breeding silver carp, bighead carp can not feed. In general, stocking levels can be varied as follows
2019-01-16 -
Treatment of fish exophthalmos
Signs of infection one or two eyeballs of a fish protrude abnormally. (explanation: some fish, especially ornamental goldfish, are born with protruding eyeballs. Exophthalmos of affected fish can affect a variety of fish infections in ponds and aquariums details the development and infectivity of the disease depends largely on the etiology, which is often difficult to determine. Swollen eyeballs can be caused by a variety of causes, including fish tuberculosis, white spot disease, edema, insect cataracts (various trematodes)
2019-01-16 -
Artificial multiplication technique of large silverfish in Hongshan Reservoir
Hongshan Reservoir is located in the lower reaches of Laoha River in the northeast of Chifeng City. it is a large plain reservoir integrating flood control, irrigation and aquaculture, with a rain area of 24500 square kilometers and a total storage capacity of 2.56 billion cubic meters. the fish culture area of the reservoir is 80, 000 mu ~ 130000 mu in low water season and high water season. The fertilized eggs of large silverfish were introduced into the reservoir in 1995, and the fishing yield reached 2.5kg/ mu in 1998, and the yield decreased in the following two years, but in recent years, due to the adoption of more perfect proliferation management measures, the resources have been gradually restored.
2019-01-16 -
Production technology of sand tea sauce and silver shrimp paste
Sha Cha Sauce: usually fried shrimp and onions, roasted peanut kernels, and then boiled with garlic, sugar, tempeh, soy sauce, sand ginger powder, raw oil and a small amount of preservative powder to get the finished product. Silver shrimp paste: the finished product is obtained by grinding and drying the raw materials such as white wine, shrimp lamb, a small amount of shrimp paste and a small amount of preservation powder. Quality standard and edible method the color is light brown and fresh, with unique aroma, sauce flavor and shrimp flavor. Sand tea sauce and spicy garlic. It is required that there should be no mildew and no insects. Mainly for minor adjustment
2019-01-16 -
Processing technology of large silverfish
Large silverfish, also known as noodle fish, was widely distributed in the middle and lower reaches of the Yangtze River and affiliated lakes. Its meat is delicious and nutritious, and it has a special fragrance of cucumber. The large silverfish is generally about 20cm in body length, no bone and no thorn. It is a kind of small and valuable fish with high economic value, which is very popular in domestic and foreign markets. From 1985 to the early 1990s, the reservoir transplanting and proliferation of large silverfish has been carried out in an all-round way in China and achieved success, its distribution area is constantly expanding, and the output is increasing day by day, how to do a good job of silver.
2019-01-16 -
How to breed fairy fish
Fairy fish, English name AngelFish, scientific name Pterophyllumscalare, belongs to the representative species of Sparidae. The fish of the family Sparidae have a characteristic that they will never give birth to the next generation unless they fall in love with each other, and they have the nature to take care of the next generation. However, fairy fish are very afraid of disturbance during reproduction, and if they are disturbed during pairing breeding, there will be a tragedy of eating their own eggs or small fish, so it is difficult for them to reproduce in an environment free from external interference.
2019-01-16 -
Frozen crab forceps
Ingredients: 10 live crab forceps, 10 grams of Agar, 100 grams of soup, 25 grams of ham, 25 grams of celery, 10 grams of red pepper, 20 grams of wet Lentinus edodes, 2 grams of monosodium glutamate, 2 grams of refined salt, and 10 spoons. Making method: (1) first break the crab clamp James cooked, remove the crab clamp shell, take out the whole crab clamp meat, leave two crab forks, marinate with a little salt and monosodium glutamate for 5 minutes. In addition, soak Agar in clean water for 2 hours. (2) boil the soup over slow heat and boil it in soaked Agar until melted, add the seasoning to wait.
2019-01-16 -
Processing of fish roe
Before making caviar, fish eggs can be processed into caviar products, and the process is basically the same as that of caviar. However, after the treatment of fish eggs, the roe is not removed and directly carried out post-processing (post-treatment is to produce different products such as salted, smoked products, etc.). Most of the world's fish roe products are stored by dry or salted methods. Generally speaking, smoked products have to be fermented. The salted fish eggs were smoked and the separated fish roe were put in a bucket, sealed and stored in a cool environment (13 ~
2019-01-16 -
Artificial ovulation induction technique of barracuda
(1) the basic principle of artificially induced ovulation is also called induced labor. Commonly known as aphrodisiac, green, and so on. The artificial method is to inject drugs into the mature gonadal parent fish to stimulate the gonads to further mature and discharge, so as to obtain mature eggs (or male fish sperm). Accurate grasp of the spawning season, selection of parent fish suitable for spawning, and the use of effective dose injection in the appropriate temperature range is a necessary condition for artificial spawning. Whether the spawning technique is appropriate or not affects the fertilization rate and hatching rate of fish eggs as well as the yield of parent fish and postpartum.
2019-01-16 -
Freshwater shark, a rookie of the breeding family.
Freshwater shark is a new species of freshwater aquaculture introduced from abroad in Chaoyang Aquatic Science and Technology Park in 1999. It is native to Malaysia, Thailand and other places. There are two kinds of freshwater sharks: black freshwater blue shark and white freshwater white shark. Freshwater sharks have many excellent characters. First of all, it has a beautiful shape, the back is obviously raised, the abdomen is round, the head is conical, and the body surface is smooth and scaleless. Southeast Asian countries not only regard it as an important fishing fish, but also export their fry as tropical ornamental fish. Second, freshwater sharks live in
2019-01-16 -
Symptoms and prevention of hepatobiliary diseases in fish
Fish viral diseases, bacterial diseases, nutritional metabolic diseases, water pollution and long-term use of large doses of the same antibacterial drugs, etc., will cause liver and gallbladder lesions in fish, especially in two-year-old grass carp, which often causes huge economic losses to the majority of farmers. After fish suffer from hepatobiliary disease, they usually appear normal, and the main problem occurs in the internal organs. The main symptoms are: 1. Color change. The liver is white, pink, khaki, tan, purple-black or red.
2019-01-16 -
The importance of "Montmorillonite" in Crystal Shrimp breeding
Crystal shrimp montmorillonite is specially used for ornamental crystal shrimp culture, with a purity of 95-98% Ph6.5-7.5, which can be directly put into the sink. Crystal shrimp montmorillonite can stabilize the water quality, but the water quality maintains a certain hardness (GH,4-6) and carbonate hardness (KH,1-2), which can absorb or inhibit the production of ammonia and organic amines. Academically, it is also recognized that montmorillonite can be used as the main component of bacterial culture medium for nitrifying bacteria. 1 efficacy of montmorillonite for crystal shrimp
2019-01-16 -
The usage of common fish medicine
1. Quicklime can be used for pond cleaning and disinfection, and can increase PH of pond water and improve pond bottom quality and water quality. 2. Formalin (formaldehyde) can kill rotifer, tongue cup worm, ring worm and melon worm in 30ppm solution for 24 hours; 250ppm for 1 hour and 100ppm for 3 hours can treat the third generation of worms and other protozoa; soak the spawning fish nest for 2 minutes with 3% 5% solution for 3 minutes to prevent water mildew; sprinkle with alkaline green mixture throughout the pool to treat melon disease; 1.
2019-01-16 -
Selection methods of common turtle species
Tortoise: it is required that the carapace of the male tortoise is black, the base of the tail is thick, and the depression in the bottom plate is long and deep; the tortoise of the female is short and thick, and the tail is thick and short, it is best to choose the tortoise over 8 years old, the weight of the female turtle is 350g, and the male tortoise reaches the age of gonadal maturity, the ratio of male and female is 2 ∶ 1 to 3 ∶ 1. Money tortoise: when choosing, hold it over with your hand, its head will stretch out very long, the thickness is uniform, and the eyes will move flexibly. The skin is bright, the temperament is gentle, the distance between the upper and lower nail of the tail is large, and the cloaca is wide. It is required that the turtle is over 6 years old, and the female turtle weighs 1250 grams ~ 150g.
2019-01-16 -
The disease of the soft-shelled turtle.
Soft-shelled turtles are timid, afraid of people, afraid of the cold, like drilling mud, like basking in the sun. Once sick, its behavior is abnormal, it no longer drilling mud and sun back, like to hide in a shady and dry place, move slowly, not afraid of people. According to these characteristics, problems can be found as soon as possible, which is beneficial to the prevention and treatment of soft-shelled turtle disease. In the pond where there is no habitat of diseased soft-shelled turtle, once the soft-shelled turtle gets sick, it is difficult to detect and often delay treatment. Once it comes to the surface, it is terminally ill and cannot be saved. Healthy soft-shelled turtles move quickly, as long as they find
2019-01-16 -
Identification and control of black velvet beetle
Black velvet gold electronic common name blind bump son, big velvet jacket. It mainly damages soybean seedlings with adults (gold electrons), biting growth points or biting young stems. When serious, seedlings can be eaten up, resulting in lack of seedlings and broken strips, or even destruction of land. This insect occurs one generation a year and overwinters as adults in the soil. From late April to early May, they feed on weeds first, and bite bean seedlings after soybean emergence. This insect lurks in the soil at night and comes out to harm during the day. At 3-5 p.m., the number of insects was the highest, and the number of insects was the highest in warm days without wind. Prevention method: available 2.5
2019-01-16 -
Fish species are released in autumn to ensure survival in autumn.
Strengthening the cultivation of fish species in autumn is the key to improve the survival rate of overwintering fish species. Improve the environment before the release of fish species, release half of the original pond water, and then add new water. 150 kg fermented manure was applied per mu pond, once every 9 days, for a total of 3-5 times. Appropriate topdressing of chemical fertilizers based on nitrogen and phosphorus, generally 1.5-2.5 kg of urea and 3-5 kg of superphosphate per mu of pond, about once every 7 days. Add fresh water after each fertilization to keep the transparency of the pool water at 20-30 cm. Use quicklime 10 per mu of water every half a month
2019-01-16 -
Prevention and treatment of common diseases of fish and crab
First, grass carp bleeding disease: fin, mouth, orbit, muscle, intestinal bleeding, some or all bright red. Prevention and control: 1, the whole pool sprinkled with dibromohydantoin or chlorine dioxide, an average of 1 mu of water depth of 1 meter with dibromohydantoin or chlorine dioxide 200 grams. Use it again every 2-3 days. 2. Feed the bait to Yuerkang, mix 1kg of Yuerkang every 50kg of feed for three days. 3. Feed the bait, mix 50 grams of 50 grams of feed every 50 kilograms of feed, once a day for three days. If combined with dibromine sea for external use
2019-01-16