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2.3.1 Bait Moonfish is a typical carnivorous fish that prefers animal feed. In the first few days after entering the pond, the zooplankton in the pond were quickly devoured. At this time, zooplankton, leeches, fly maggots and a small amount of artificial compound feeds were added. Afterwards, the artificial compound feed was gradually added. The content of crude protein in the artificial compound feed is 38%~42%. It must be done regularly, quantitatively, qualitatively, and positionally when feeding food. Usually two times a day feeding, 1 in the afternoon and 1 in the afternoon, should not be fed more, and not too full. To set the food table when feeding, use a bamboo basket or shallow bamboo charcoal to fix it on the surface of the water at 25 cm, eat while eating, and observe the feeding situation. The daily feeding amount is adjusted according to the feeding condition and is generally about 3% to 10% of the fish's body weight.
2.3.2 The water temperature in the water quality management pool is controlled between 20°C and 34°C, high temperature (>35°C) or ground temperature (
2.3.3 The daily management mainly pays attention to the three aspects of changing water, preventing flight and hunting. Due to the animal feeding nature of Yuesao, it is inevitable that there will be residual bait for each feeding. These baits will accumulate over a long period of time. In high-temperature and hot weather, it will cause water quality deterioration, breeding of pathogens, and flooding of ponds. Therefore, it is necessary to patrol the pond early and late every day and find problems in time. Usually pay attention to changing the water, washing table, to keep the water fresh. The ability of the moon to escape is strong, especially in rainy days, when changing water, or even in the early morning. Therefore, the pond embankment should generally be more than 0.5 meters above the surface of the water, or be surrounded by high nets. When watching the pond, it is necessary to observe the fish movements and find that there are abnormal conditions such as outliers, black bodies, etc., which must be handled in a timely manner; pay attention to the prevention of snakes, rats and birds. After breeding for a period of time, when sizes and sizes appear, it is necessary to divide them in time to avoid mutual killing.
3 fish disease prevention
Mongooses rarely develop in the wild, but under the conditions of artificial breeding, if they are improperly reared and managed, the environmental conditions will deteriorate, and fish resistance will also cause fish diseases. Therefore, during the cultivation period, we must adhere to the principle of prevention, prevention and control.
3.1 Prevention Methods
Pay attention to the change of water quality, change the water frequently, and change slowly and slowly when changing the water. Wash the food table frequently and clean up the bait in time to keep the water fresh. Feed the nutrient-rich feed, and prohibit the feeding of rotten and spoiled feed, so that it can be reasonably fed. Do a good job of drug prevention. Sprinkle 25ppm quicklime or 10ppm bleach on a monthly basis in summer and autumn. Adhere to the patrol pond and find anomalies and handle it in time.
3.2 Prevention and treatment of common diseases
Dizziness: Diseased fish have a dark body, loss of appetite, and lack of clusters. In severe cases, fish swim on the water, struggle and spin, and then submerge and die. Treatment can be treated with methamidophos 0.3ppm Quanchiposa, or with 40% formalin 40ppm + Litlin 4ppm mixed Quanchiposa.
Malnutrition: As a bacterial disease, red or white lesions appear in the body of the fish (especially the head and tail) at the time of onset. The scales fall off, the muscles congestion, and the rays rot. Treatment can use chlorine dioxide or strong chlorine 0.3ppm Quanchiposa, used twice, from the third day per kilogram of feed added 2 to 3 grams of erythromycin or chloramphenicol orally.
Intestinal disease: The abdomen of the fish is swollen, the anus is swollen, the abdomen is lightly pressed, the abdomen is lightly pressed, and the yellow fluid flows out. The outliers travel alone. The anatomy shows intestinal hemorrhage. There is no food in the intestines. Treatment can use chlorine dioxide or strong chlorine 0.3ppm Quanchiposa, and then once again every other day, and mixed with terramycin powder, plus 3 grams per kilogram of feed, feed 3 to 5 days.
Trichoderma disease: fish scales fall off, fins are incomplete, muscle tissue gray, body thin, black, silkworm congested and rot, microscopic examination can be seen in body surface mucus and cocoon silk full of parasites. Treatments were splashed with 0.5ppm copper sulfate + 0.2ppm ferrous sulfate in the whole cell.
Saprolonia: A white hairy hyphae grows in the affected area. The appetite of the diseased fish decreases, and the action slows until death. Treatment can be used 0.2ppm malachite green solution Quanchiposa.
Yueyu adult fish breeding technology (2)
2.3 Feeding Management