1. What are the common points between Pan Tang and poisoning?
1. Short-lived death time of fish. From the discovery to the total death of fish, there is only a short time, among which the shortest is the time of human poisoning and the longest is the industrial wastewater poisoning.
2. The mortality rate is high and there are many types of deaths. It is difficult for any species of fish to escape.
3, short-term drug treatment is difficult to work.
Second, Pan Tang and poisoning What are the differences?
1. Distinguish from the time of occurrence
Pan-tang: There are laws to be found, and observations can be made according to seasons and time periods. Pantang occurs in the summer high temperature season, especially in continuous rainy days and continuous low-pressure hot weather; Pantang occurs in the middle of the day and in the early morning and early morning, especially in ponds with more water quality and higher stocking densities. More likely.
Poisoning: There is no season, weather, day and night time division, and it has nothing to do with the size of stocking density. More often than not, poisonous sewage enters ponds, such as sewage from factories and mines, outbreaks of cyanobacteria, or is treated with overdose or improperly applied methods when treating fish diseases, or pesticides are often washed in ponds when pesticides are applied on the farm, or they are individual elements. For various reasons related to poisoning the pond. There is no regularity in the time of poisoning dead fish.
2, distinguish from the performance of fish
Pan Tong: floating head due to lack of oxygen, pond fish scattered throughout the pond to reveal the body, the mouth one by one to calmly draw oxygen from the surface of the air, serious hypoxia, pond fish white belly slowly upturned, while struggling to maintain balance, Repeatedly several times the final white belly dies.
Poisoning: floating head phenomenon is not obvious. The symptoms vary according to the poison. Some of the pond fish showed scampering, jumping, and finally struggling to eventually die; some pond fish showed poor feeding, sluggishness, and their body color gradually turned black and hardened, eventually died of incapacity.
3, distinguish from the type of dead fish
Pans: Pan dead fish is generally more common in pelagic fish such as cockroaches and catfish; dead fish are less likely to die of benthic fish such as cockroach and cod.
Poisoning: Death of poisoned fish does not depend on the type of fish, and even dead animals that are extremely tolerant to hypoxia may die.
4, distinguish from the cause of occurrence
Pan-tang: The direct cause is generally caused by abrupt changes in the weather and low air pressure. The oxygen in the pool runs into the air and causes oxygen deficiency in the pool water. The indirect causes are mostly due to poor daily management. For example, the density of the fry is too large, the feed is fed in a non-quantitative manner, and sudden overfishing occurs; the residue of the feed is not removed in time, and the remaining bait is continuously decomposed by oxygen in the pool; the pond has been used for many years. The slush was too thick, and suddenly pulling the net caused a large amount of harmful gases in the mud to escape.
Poisoning: Most of the direct causes were caused by artificial poisoning due to discord in the neighbourhood. Some were too close to the outlet of the chemical plant, or there was a large factory in the upper reaches of the water supply. They did not rule out the possibility of human theft.
5, distinguish from the effect of rescue
Pan Tong: If the farmers often visit the pond, timely detection and immediate rescue measures can recover most of the economic losses.
Poisoning: There is no special effect method. Only the new water can be immediately infused to eliminate the relative concentration of harmful substances in the low pool, and the losses suffered are relatively large.
Third, how to do flooding or poisoning?
The death of fish caused by pan-intoxication or poisoning can only reduce the economic losses caused by these two accidents if it is discovered that timely and active measures are taken to rescue them.
Pan Tang emergency treatment method:
The fish ponds with signs of flooding ponds were immediately filled with new water, and the aerators continued until dawn at the middle of the night. For fish ponds that are difficult to irrigate but do not have aeration equipment, they can be rescued by the following measures:
(1) Apply 5 to 10 kilograms of salt or 3 to 5 kilograms of alum to water in the entire pond after each acre of water.
(2) Use 100 kg of dry yellow mud per acre of water, add 5 kg of salt or 2.5 kg of raw gypsum into the slurry and splash it in the whole pond.
(3) Use 10 kg of dry yellow mud to add water to the pulp for each mu of water, and then add 50 kg of human urine and splash it in full.
(4) Use water pump to pump water to increase oxygen, but bury the board to prevent the water pump from sinking into the mud.
Emergency treatment of poisoning:
1. Immediately change the amount of water and introduce clean water. At the same time, oxygenating agents or oxygen aerators should be used to ensure fresh water and adequate dissolved oxygen. If the poisoning is heavy, the fish should be transferred to a new pond so that the diseased fish can escape the poisonous environment. When you find poisoning, you must not use drugs to avoid death.
2. The farmer should correctly determine the source of poison after finding poisoning, and take corrective measures to eliminate the source of poison. Can use oxidation, neutralization, precipitation and other measures, acidic substances have a good effect on detoxification, ginger fishery drugs such as splashing ginger can wash away toadskin toxins, prevent fish and shrimps on the further absorption of poisons to ensure smooth breathing of fish.
3. Ease the symptoms of fish poisoning. The right medicine is applied in a timely manner to remedy various dysfunctions caused by poisoning and restore physiological functions. For poisons that have been absorbed, various drugs for detoxification and enhancement of immunity should be taken in time to reduce the concentration of poisons in the blood, block the effects of poisons, and promote the excretion of poisons.
Whether it is flooding or poisoning, it will cause large or small economic losses to farmers. Therefore, farmers need to strengthen the management of ponds, stick to daily pond surveys, observe weather and water colors, check hardware facilities, and so on.
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