Aquaculture Lists
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Prevention and treatment of common diseases of fish in spring
1. Myxococcus, the pathogen of Gill rot disease. Symptoms of diseased fish body color black, alone, waste food. Gill silk rot with mud, Gill cover inside the epidermis hyperemia, often corroded into a round transparent hole, commonly known as "open skylight". After the Gill valve of grass carp was infected with myxococcus, the tissue in the diseased area showed different degrees of decay, ulcer and invasive bleeding. This disease can occur in herring, grass carp, bighead carp and other farmed fish, especially grass carp. The water temperature is below 15 ℃, which is generally rare. About 20 ℃, it becomes popular. Preventive water depth 1
2019-01-15 -
Breeding skills of Crystal Shrimp
1. Set up a place for crystal shrimp breeding should choose a cool place and the sun can not directly shine on the place, this is the basic rule of breeding, as far as possible to avoid windows and places vulnerable to external influence. If there is more than one aquarium at home, the aquarium for crystal shrimp should be placed at eye level to help breeders identify the health of crystal shrimp. In addition, it is best to remove the lid of the aquarium that raises crystal shrimp, so as to facilitate the maintenance of the aquarium. If you're worried about crystal shrimp,
2019-01-15 -
Introduction to the Culture methods of Bamboo shoot Shell Fish in Thailand
The market price of bamboo shoot shell fish is high, the development prospect is good, many people want to raise, but do not know how to raise, the author specially writes this article for the reference of breeders, various culture methods are suitable for farmers in different regions and environmental conditions. 1. The pond area of Thai bamboo shoot shell fish cultured in the pond is 3 mu, usually no more than 8 mu, the water depth is 1.5 meters, less silt and good water source. There are 3000-3500 seedlings per mu. It is appropriate to cultivate Thai bamboo shoot shell fish for the first time. Clear the pond before releasing the seedlings.
2019-01-15 -
Steamed Jiaozi with shrimps
Variety name Shrimp main raw materials Fuqiang powder 500 grams, shrimp 250 grams, pork 300 grams, net winter bamboo shoots 250 grams. Auxiliary raw materials Shao wine 10 grams, sugar 8 grams, refined salt 6 grams, monosodium glutamate 4 grams, chopped onions, ginger a little. Category family cuisine method name shrimp Steamed Jiaozi technological process 1. Wash and drain the shrimps and chop the pork together. Boil the bamboo shoots and cut them into pieces. Mix them in the mashed meat. Add Shaojiu, sugar, salt, monosodium glutamate, chopped onions and ginger to form a stuffing. two。 Put the flour into
2019-01-15 -
Intensive cultivation techniques of parent fish during transformation period
After the beginning of spring, the gonadal development of parent fish gradually transformed with the increase of water temperature. Especially before giving birth from the beginning of spring to the middle of May, the gonadal transformation of parent fish is very fast, and the ovary coefficient can reach 15% to 20%. During this period, strengthening the cultivation and management of parent fish during the transformation period can promote smooth spawning; on the contrary, gonadal development will stagnate or even degenerate. The intensive cultivation techniques of parent fish during the transformation period are as follows. First, divide the pool at the right time. In order to grasp the growth and development of parent fish and facilitate the arrangement of spawning and reproduction, the parent fish should be divided into ponds when the water temperature is 10 ℃. Disinfect the small pond before dividing the pond
2019-01-15 -
A STUDY ON HYPOPHILA DISEASE OF EUPHILA EELLUS
In recent years, large-scale intensive culture of European eel has been increasing in China. However, with the expansion of culture scale and the continuous increase of culture density, various problems affecting the survival rate of European eel are increasing day by day, and the outbreak infectious disease of European eel caused by hygrophilic bacteria is one of the outstanding problems. A series of preliminary studies on the physiological and biochemical characteristics, pathogenic factors and pathogenic conditions of hygromonas were carried out in order to provide a powerful theoretical basis for the prevention and control of European eel outbreak infectious diseases and to promote European eel culture to be stronger.
2019-01-15 -
Disease prevention measures for releasing fish fry in spring
With the rise of water temperature in spring, germs are easy to reproduce. In addition to selecting high-quality fish species with neat specifications and no harm to the body, we should also pay attention to preventing the occurrence of diseases. The main measures are as follows: the whole pond and tools should remove weeds, remove excessive silt, plug cold loopholes, flatten the bottom of the pond, and then sprinkle all over the pond with quicklime, bleach and other drugs. Fish nets, buckets and other fish culture tools should be exposed to the sun for about 2 days before use, or soaked in high concentration of raw lime water, bleach and other solutions.
2019-01-15 -
Four services do a good job of prevention and control of cage fish diseases
Recently, it is the season of high incidence of cage fish diseases. The fishery authorities in Ningbo City, Zhejiang Province have grasped four services to comprehensively carry out disease prevention and control work. First, science and technology to the countryside service. Disease forecasters in various areas regularly go to each reporting point and the surrounding cage culture areas to learn about the situation, and the disease forecasters at the same level in the city are guaranteed to carry out services at the grass-roots level twice a week (1-2 days each time). Second, rapid response service. If the fisherman encounters a sudden disease, the organization experts will rush to the scene within 2 hours.
2019-01-15 -
Breeding techniques of Carp Koi
1. Choose parent fish, and brocade carp, as ornamental fish, should select parent fish purposefully. Koi mainly watch the back, so it is best to choose the upper and lower flat, the profile is flat oval, the whole is spindle-shaped, and the color is based on the breeding purpose to select the corresponding body color of the parent fish. 2. Prepare the spawning pool, and generally use the small cement pool as the spawning pool. The shape of the pool is unlimited, the size is 4 meters high, 4 meters wide, 0.8 meters deep, and the water depth is 0.4 to 0.5 meters. Breeding water pH 7.2-7.4, brackish, low hardness
2019-01-15 -
Can blood parrots be mixed with koi?
Some people ask, can blood parrots be mixed with koi? The answer is yes: these two kinds of fish are not suitable for raising together at all. There are three reasons: first, because the blood parrot is tropical fish, koi is cold water fish, the temperature requirements are different. Second, blood parrots are particularly afraid of lack of oxygen in water quality, and the oxygen demand of koi is also very large. If your tank is small, it should not be mixed. Third, the blood parrot is a fish of the family Sparidae, which is aggressive to a certain extent.
2019-01-15 -
Methods of controlling the sex of fish
Controlling the sex of fish is an effective way to increase fish yield. In general, the use of sex hormones can induce the sex of fish to develop in the desired direction. There are two kinds of sex hormones, testes secrete androgens, ovaries secrete estrogen. The primitive reproductive epithelium of fish has two components of the medulla that determine the development to female and male. Under the action of estrogen, the cortex becomes ovary, the medulla is undeveloped and the female has the function of spawning and reproduction; on the contrary, under the action of androgen, the fish will become male. Therefore, in the hair
2019-01-15 -
Summary of the experiment on the introduction and culture of Boleophthalmus
The big catfish is a small economic fish along the coast of warm and humid tropics. Like to inhabit the salty and fresh water waters of harbors and estuaries, muddy shoals in the intertidal zone, and dig caves, its meat is delicious and nutritious, so it is a characteristic variety with development prospects. In order to fill the gap of culture in this area, we actively introduced fish fry and carried out culture experiments in 2006. After months of exploration, the experiment was successful and basically mastered the culture technology. Now we briefly introduce the culture methods as follows. I. the basis of the test
2019-01-15 -
Integrated control technology of fish floating head
From June to October every year, the temperature is high and the weather is muggy. If the fish stocking quantity is too large and the water quality is bad, it is easy to cause anoxia floating head, or even suffocate to death. In severe cases, 1-2 hours can cause all the pond fish to die. Therefore, correctly analyzing the causes of fish floating head and identifying the omen and severity of fish floating head are of great significance to strengthen daily management and rescue Fantang in time. (1) the reasons for the floating head of fish. There are mainly the following aspects: (1) Blind excessive feeding and fertilization, resulting in excessive fertilizer of water quality, mass reproduction of plankton, and organic.
2019-01-15 -
7 new effective fish medicines
Fish bug killer. This product is an external insecticide for green, grass, bighead carp, crucian carp and bream. It can kill parasitic Chinese carp, anchor head carp, trochodina, small melon worm, third generation worm, sporozoa, dactylogyrus, fish carp, hook shell larvae, etc. on fish within a few hours. It can also kill water centipede, ants and other pests. High chlorine. This product is a fungicide. It has strong killing effect on bacteria, fungi, germs, fungi, etc., and has strong killing effect on hemorrhagic disease, red skin, printing, rotten gills, black gills, enteritis, rotten shell and red skin of fish, shrimp, crab, turtle, eel and frog.
2019-01-15 -
Myxobacterial rotten carp disease
First, the symptoms: the gills of the diseased fish rot, with some sludge. Sometimes the tip tissue of the Gill decays, resulting in incomplete edge of the Gill, and sometimes one or more parts of the Gill rot, not at the edge. The lining of the operculum is congested, sometimes broken and corroded into a slightly round transparent area, commonly known as "open skylight". Due to the destruction of Gill tissue, the diseased fish have difficulty in breathing and often swim near the water surface in the shape of a floating head. Seriously ill fish still have the phenomenon of floating head after changing clean water. 2. Pathogen: columnar fibromyxobacteria (Cytophagacolu)
2019-01-15 -
Protozoal diseases of shell fish
Pathogen: saltwater small melon worm, the body is spherical or oval, similar to many small melon insects, the size of 0.066-0.45 × 0.034-0.36mm, the whole body is covered with cilia, there are generally four beads nucleus accumbens. Prevalence: adult watermelon insects are mainly parasitic on the gills, skin and fins of marine fishes, and are popular in coastal areas from mid-May to August every year. Saltwater melons are suitable for reproduction at a temperature of 20-25 ℃, and their cysts and larvae spread. Symptoms: first of all, there are a large number of white spots on the body surface, and in severe cases
2019-01-15 -
Colorful shredded Shrimp
Fresh shrimp (river shrimp, sea shrimp can be) peeled, washed and dried with a dry towel, into the food grinder, add egg white, salt, monosodium glutamate, twisted into a fine antler. Put the minced shrimps into an empty plastic bag and poke a small hole 2mm in diameter with a bamboo stick at the corner of the bag. Heat the oil in the pan to 120 ℃, squeeze the minced shrimp from the small hole in the corner of the bag into the oil pan, heat and shape the shrimp into shredded shrimps, remove and rinse in cold water and cut into 10cm long. Heat a little oil in the pan, stir-fry spring onions and ginger, and put in four shreds (incense)
2019-01-15 -
What should brocade carp pay attention to before entering the pool?
The transportation of koi is very simple, as long as you put it in a plastic bag for oxygen. Young or medium-sized fish can be transported by themselves, but large fish are often transported by operators. New fish are at great risk of carrying bacteria or parasites, and healthy fish will often be infected when they are not handled properly. Therefore, salt and antibiotics should be added to the water for transportation. Anchor head fish fleas and leeches are visible to the naked eye. If found, the wound must be removed and disinfected immediately. The most important thing is to adjust the water temperature. Generally speaking, the pool water of the operator is higher than that of the enthusiast. If the difference in water temperature is more than 5 ℃, fish are easy to catch cold.
2019-01-15 -
Selection skills of eight kinds of turtles
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. Turtles over 6 years old are required. Female turtles weigh 1250 grams to 15 grams.
2019-01-15 -
New breeding variety Xianke giant crucian carp
Crucian carp is an omnivorous fish species mainly based on plant feed. Its living water temperature, feeding water temperature, growth water temperature, pH value and salinity are 0.38 ℃, 1035 ℃, 1532 ℃, 58.5 and 0 ~ 7 ‰, respectively. The giant crucian carp has a strong ability to adapt to bait, and the juvenile stage mainly feeds on plankton. When the body length reaches more than 6 cm, it begins to take plant feed and eat both organic detritus and commercial feed. The giant crucian carp of Xianke family grows fast and can grow to 0.6-1.5 kg for half a year to one year.
2019-01-15