cold
Etiology and Symptoms: Due to sudden changes in water temperature exceeding 5°C, the physiological factors of normal exercise can not keep up with changes in in vitro temperature, resulting in imbalance of body cortex infiltration and inhibition of body fluid metabolism and occlusion of body temperature regulation pathway. When the onset of jaundice skin lost its original luster, severe shock. The disease mostly occurs in summer.
Prevention: Strengthen water temperature and water quality control. The temperature difference between the water temperature when changing the water does not exceed 5cC. When changing water, the water should first flush into the pool buffer pit and should be injected in a trickle. The replacement of fresh water must not exceed one third of the old water in the entire pool. When the overall situation is good or has caused extreme deterioration of the carrier, it can be replaced with more, but the water injection should not be too urgent.
fever
Etiology and Symptoms: The disease is mainly due to the fact that the density of artificial stocking is too large and the water is not replaced in time, resulting in the accumulation of mucus secreted by Astragalus membranaceus, fermentation, release of a lot of heat and the sudden increase of water, dissolved oxygen in the water, and suppression and destruction of the Astragalus membranaceus The onset of jaundice occurs due to normal metabolism. The disease manifests itself as acupuncture points, neurotic migration, intertwining and rolling, mucous surface shedding, swelling of the head, and extreme anxiety.
Prevention: Replace the pool water and add oxygen under the mud. Reduce stocking density and change water in a timely manner. Use a 0.07% copper sulfate solution to sputter the whole cell at a rate of 5 ml per square meter of water. Polyculture partially muddy to increase the ability to clean up the sewage.
Atrophy
Causes and Symptoms: As the stocking density is too large, the food is insufficient, and the small yellow eel is suppressed by the rhubarb, and the carcass is atrophied due to chronic starvation. The disease is black, thin, and has a large body. In severe cases, loss of appetite will result in death.
Prevention: Provide enough food and strictly carry out the feeding. When the feed is in shortage, the stocking density can be reduced. In the early stage of the disease, fresh bait is added in time. Such as 蚯蚓, 蛆 and so on.
Hypoxia
Causes and Symptoms: Due to the high temperature of the water in Dianchi Lake, various physicochemical reactions are intensified without timely treatment, so that the dissolved oxygen in the water drops, resulting in hypoxia. At this time, Astragalus couldn't look up and breathe air, causing the body to suffer from respiratory dysfunction and a dramatic decline in blood oxygen carrying capacity, resulting in hypoxia in the brain. The disease manifested as frequent probes outside the hole, and even if it did not enter the cave for a long period of time, spasmodic trembling occurred in the head and neck. Generally, it died after 3 days to 7 days.
Prevention: Strict monitoring and control management to maintain the carrier's comprehensive buffer capacity. During the hot season, oxygenation and cooling should be performed in time to prevent disease. Immediately after the onset of water change, while high-density sludge mud. Remove the paralyzed disease in time to reduce the carrier burden.
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