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Judgment and Rescue of Poisoning Ponds
First, judging from the time of occurrence poisoning dead fish can occur during the day and night. Generally, there is no season or weather, and there is no significant relationship between pond water quality and pond pond stocking density. Many factories and mines use excessive amounts of drugs or improper methods of application when discharging pollutants, or when cleaning pesticides in ponds when applying pesticides on farmland; and when overdose or improper application methods are used when preventing and treating diseases; Pantang occurs mostly in the summer and hot seasons, especially continuous low-pressure hot weather, continuous rainy weather, and thunderstorms. Flooding accidents occur most frequently, and occur mostly during midnight to midnight. The more dense the fish is, the more likely it is that the pond will be flooded, and the degree of flooding will be more serious. Second, judging from the performance of pond fish when fish poisoning occurs, fish floating phenomenon is generally not obvious, and its symptoms are also different due to different poisons: some manifested as slow action, paralysis, body color slowly, Lost ability to die. The flood pond shows a serious lack of oxygen floating fish head, scattered in the pond throughout the mouth one by one, directly from the surface of the air to absorb oxygen. When the head is floating, the silver fleas and beaks that float in shallow water, and then the belly slowly turns up, struggles to maintain balance, and the belly dies. Third, judging from the type of dead fish pond fish poisoning death is generally regardless of the type and size, even the ground fish such as cockroaches, cockroaches, and even muddy will die, severe death of the whole pond fish. The dead fish in the flooded ponds are more common with silver cocoons, cockroaches, cockroaches, cockroaches, cockroaches, etc. Other types of animals are less likely to die, and cockroaches and cockroaches are generally not likely to die. 4. Rescue measures Dead fish caused by the above two causes can be rescued as soon as they are discovered. The first-aid measures for flooding ponds are timely flooding of new water and aeration, and ponds with inconvenient water sources and no aerators can use calcium peroxide for oxygenation, or splash yellow mud, alum, and other coagulants. The first-aid measure for pond fish poisoning is that any pond with good water conditions should immediately flush with fresh water, release the old water from the pool, and continue to row and feed until the fish return to calm. Ponds with difficult water sources should immediately pull nets to fish, quickly transfer the fish to non-toxic ponds or gutters, and hold them in cages. After the original pond's poisonous water is properly disposed of, it can be returned to the original pond. For poisoning caused by pesticides such as methamidophos, phoxim, and pyrethrins, lime slurry can be used to reduce toxicity. Generally, 15 kg to 20 kg of lime are used per acre. For poisoning caused by pesticides such as toxachlor and sodium pentachlorophenol, the method of splashing human urine has detoxification effect, and 300 kg to 400 kg per mu of water are spattered.