Arowana Feeding Technology

It still maintains the shape and habits of ancient times. The "Dragon Fish" known as the "living fossil of fish" is extremely valuable for keeping and viewing. The fish was shining with light, large scales, a large mouth, and two tentacles in the corners of the mouth. It looked like a mythical dragon. This fish is also known as "Dragon Turtle Fish" (Macao, Hong Kong), "Silver Ribbon Fish" (Taiwan), "Silver Carp Fish" and "Silver Saury Fish" (Japan). The author introduced dragon fish in 1985. After more than ten years of breeding practice and referring to relevant domestic and foreign technical data, the Arowana artificial feeding method is introduced as follows:
1. Arowana and its value for rearing Arowana is a large-scale freshwater fish, belonging to the family Phyllosauridae. It existed as early as in the ancient Carboniferous period. The discovery of the fish began in 1829 in the Amazon basin in South America, when it was named by American ichthyologist Dr. Vandell. In 1933, French ichthyologist Dr. Lulu Lunhong discovered red arowana in Saigon, Vietnam. In 1966, French ichthyologists Bulan and Dobton discovered another species of arowana in Phnom Penh. Afterwards, experts and scholars in a number of countries successively discovered other arowana species in Vietnam, Peninsular Malaysia, Indonesia, Sumatra, Bangka, Biroro, and Thailand. Taxonomy then divided Arowana into golden arowana and orange arowana. , gold arowana, platinum arowana, arowana and silver arowana. The introduction of aquariums as aquarium fish began in the United States in the late 1950s and it became popular in the world until the 1980s. Experts at home and abroad, both modern biologists and tropical fish, agree that Arowana has a high research and ornamental value. Reflected in:
(1) The arowana's body glows with silvery light and scales. When exposed to light, it reflects pink brilliance. The fins are pink or orange in color, which is unmatched by other tropical fish. Arowana often likes to swim in the water or in a static position. It is shaped like a hull, so it is called a silver boat. In the past, people believed that the discus was the “king of tropical fish” and had the highest value. Since the discovery of “Arowana”, the throne had naturally been given to Arowana.
(2) The reproduction of Arowana is mysterious and has not been able to reproduce artificially.
(3) This type of fish, which was left behind in ancient times, maintains its original shape and is known to the world as a living fossil. It has archaeological and academic value.
(4) Although Arowana can naturally grow and reproduce in the four major states of the earth, a considerable number of them, such as red arowana, orange red arowana, arowana, white arowana and black arowana have become extinct. At present, an adult golden arowana or black arowana costs hundreds of thousands of dollars. The Wildlife Conservation Act of Washington, established in 1980, has been protected by legislation to prevent overfishing and prohibition of export from the country of origin. Arowana has such great research and ornamental value, and it is looking forward to further research and development.
Second, the breeding of arowanas From the natural conditions of Southeast Asia where Arowana grows and reproduces, Amazonia in South America, and Australia, New Guinea in Nile River Basin in Africa, there are several common points: high temperature and humidity throughout the year, temperature Up to 25 °C ~ 28 °C, winter and summer does not change more than 3 °C ~ 5 °C; annual rainfall of 2000 mm, mountainous areas up to 5000 mm, trees Sheng, everywhere lush, for the Arowana to provide a rich bait basis; without exception The ground is red soil or brick red soil, organic matter, nutrient salt content is small, acidic. Under the comprehensive action of such meteorology, vegetation and soil, inland waters are generally weakly acidic soft water. To raise Arowana, we must do everything we can to meet these ecological conditions.
??1. Water quality Rearing of arowana and weak acid soft water. The water quality of tap water generally derived from rivers is weakly acidic, and it is soft water suitable for Arowana. However, tap water contains chlorine or fluorine, which is harmful to Arowana and even causes death. Therefore, when rearing arowana, the water must be stored for 1 to 2 days or exposed to sunlight for a half day, so that the chlorine or fluorine dissolved in the water will disappear by itself. If you can add a very small amount of sodium bicarbonate in water to break down chlorine. If tap water, well water, or mineral water originating from the underground are used, the hardness may be high. One third or one half of boiled water or distilled water should be added to reduce the hardness of the water. Aquarium long-aquaculture old water, due to evaporation, will generally turn into hard water and should be softened in time. The easiest way to soften water is to boil water first to remove impurities or filter it with ion exchange resin filtration equipment.
?? 2. Water temperature and water temperature is best kept at 24 °C ~ 26 °C, in particular breeding of silver dragon and black dragon, the water temperature needs to be raised to 28 °C ~ 30 °C, arowana water temperature is suddenly increased or decreased very sensitive, easy to make the nervous system Shock, Absorption, Death. When breeding arowanas, the water temperature must be strictly controlled. In particular, when aquariums raise arowanas, the temperature difference between the old and new water should not exceed 2°C when changing the water, and when the new water is injected, it must be properly used and dispersed. When the arowana is transported into the new environment for breeding, it should wait for 15 minutes or so, and then put the fish into the container when the temperature of the new container is similar to that of the new stocking environment.
?? 3. Oxygen and light water The source of dissolved oxygen is mainly two. One is the product of photosynthesis of aquatic plants; the other is direct dissolution from the air. However, the decomposing effects of residual baits, fish excretion, and aquatic plants on the branches and leaves of water are also constantly depleting dissolved oxygen in the water. Therefore, various contaminants in the rearing ponds and aquariums should be cleared in time. In order to ensure that there is enough dissolved oxygen in the water tank or aquarium, oxygen-adding equipment should also be provided.
In addition, the consumption of dissolved oxygen in water is closely related to the stocking density of Arowana. According to the author's experience, the best density of Arowana rearing is 20 cm in length, the water depth is 50 cm, and 15 square meters can raise 15 fishes. 15 As for the square meter, it can raise 30. With the expansion of the water surface, the stocking density can be appropriately increased.
The fish needs moderate light during growth. It is better that sunlight in the morning and evening in the day can reach the rearing water for 3 to 4 hours. When the light is too dark, the arowana is inflexible, its appetite is weak, and its color is dim; the light is too strong and it will also move abnormally, and even a bubble disease will appear.
Third, the feeding and management of Arowana
1. Feed. Arowana carnivorous fish, from juvenile fish to adult fish, must feed animal food to feed the active fish. Animal viscera, easy to hinder the digestive system, can not be fed. The artificial full-priced compound feeds are fed with shrimp feed (float). Feed 2 to 3 times a day, preferably within 20 minutes each time.
2. Pool feeding management. The breeding pond should be built in a place where sunshine is good and it is easy to enter and drain. For pools that do not leak equipment, the bottom sludge should be removed each year and replaced with fresh sand. The open-air ponds should be planted with water lilies. Collect dead leaves regularly every day to remove rubbish. The high temperature in summer and the low temperature in winter are often used to inject fresh water to maintain the water level and water temperature.
3. Aquarium feeding management. Arowana fish have a large body and the length of the aquarium should exceed 120 cm. At the same time, ultraviolet disinfection should be installed to prevent the occurrence of diseases. The aquarium must be equipped with an air pump that not only increases the dissolved oxygen in the water, but also repels the high concentration of carbon dioxide in the water. In order to prevent the arowana from jumping when it is frightened, the aquarium must also be stamped. The minimum water quality in the aquarium is changed once every three days. Each time, the water volume is changed from 1/4 to 1/3. If the occurrence of fin detachment may be caused by excessive renewal of water, as long as the water is immediately suspended, it can be slowly restored.
4. Disease prevention and control technology. There are two reasons for a dragon fish disease: one is improper feeding and management. For example, the water quality is not clean; the replacement of new water is too much; the feeding is improper; and the operation causes a trauma. The second is to adjust the misfortune. Such as: sudden climate change; infectious diseases; acid rain caused changes in water quality. Observed from the outside, the healthy arowana, the dorsal fins must be straight, with pelvic fins, glittering scales, and gold and silver. During swimming, the fin tail likes soft buckling, and the lid is open. The diseased fish is dull, swimming is sluggish, the caudal fin is slanted, the lid is floating up, and the eyeball is hanging down.
The following describes the three most common diseases of Arowana:
1.Anchorchosis: Approximately 1 cm in length can be found on the diseased fish body. The parasite on the head is hooked on the fish. The fish in the initial stage appear uneasy, the appetite is weak, and the parasites of the parasites are swollen and bloody. In severe cases, it causes tissue necrosis. . The cause of the illness is the long-term deployment of goldfish as a live bait, and the goldfish brought the anthozoa into the body of the arowana fish. Its prevention and control measures: change to feed other meat animal food; use 5 ~ 10ppm potassium permanganate to wash fish once a day.
2. Saprolegnia. On the diseased fish body is surrounded by fibrous aquatic mold, hyphae adhere to the skin tissue. After the fish became ill, the swimming was not lively, and the loss of appetite and gradual death occurred. The cause of the disease is the result of infection by aquatic molds. The main control measures: 12% saline soaked wounds for about 15 minutes; 2 dissolved 10 grams of water in 3 liters of borax in 5 liters of water for 5 minutes, and then moved into clean water; 3 using 0.5 ppm of malachite green over the whole pool.
3. White spot disease. The main symptoms are that the diseased fish is covered with white spots all over the body, and sprinkled with white powder. In severe cases, it is like covering the fish with a milky film. The cause of the disease is caused by parasitization of small melons on fish. The main control measures: 1 with 0.1 ~ 0.2ppm of mercuric nitrate throughout the pool sprinkle; 2 with 500ppm copper sulfate and 500ppm magnesium sulfate sprinkled throughout the pool.

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