What is the reaction of a tropical fish to hypoxia, and when is the fish most susceptible to hypoxia

Fish hypoxia is mainly manifested as a large number of fish floating heads, no disease and no injury, and death in severe cases. Hypoxia refers to the state in which the internal tissues and cells of the fish do not receive sufficient oxygen to maintain their normal function. To distinguish it from hypoxia in water, it can be referred to as "biological hypoxia" or "tissue hypoxia".

Asphyxia (dyspnea) is a phenomenon that occurs when organisms lack oxygen, and floating head is a manifestation of common dyspnea or suffocation in aquaculture production. There are two reasons for hypoxic asphyxia in fish: one is that when the dissolved oxygen in the water is insufficient and the air pressure is too low, even if the fish's respiratory function is normal, the tissue cells in the body cannot obtain sufficient oxygen, and "anaerobic hypoxia" occurs; Another situation is that when the respiratory system and circulatory system of the fish body are dysfunctional, although the dissolved oxygen content in the water is not lower than the normal needs of the fish, there will also be biological hypoxia and suffocation.

The lack of oxygen will whirl, always breathing on the surface of the tank or at the bottom of the tank ready to hang up. If you have this situation, you should pay attention to it If you have the conditions, you can get an oxygen pump That thing is not very expensive It will be good to give it a while when you have nothing I hope mine is helpful to you Thank you! Wishing your pet good health.

Lack of agility in the water, or floating on the surface of the water, is called a floating head, which is a clear sign of a lack of oxygen in the fish.

The fish all float to the surface and die.

Float your head and breathe on the water!

Floating head: If it's serious, it's death.

Excessive stocking density, untimely water change, and sun exposure lead to algae growth Generally these conditions are more common and can lead to a lack of oxygen in fish.

1.When the density of fish is high, 2Feed frequently and frequently, and consume oxygen faster 3Do not change the water for a long time 4It is also easy to lack oxygen when it is hot.

If you don't change the water for a long time, you will lack oxygen, and the food you put in, rotting will also consume a certain amount of oxygen. On a rainy day, it seems that it will be. It is best to change the water that has been sun-dried because of sterilization.

1. Dissolved oxygen in water is not chained

Insufficient dissolved oxygen in water is one of the main causes of hypoxia in fish. Fish need to inhale oxygen from the water for normal breathing. When there is not enough dissolved oxygen in the water, it is difficult for fish to obtain enough oxygen, resulting in hypoxia and even suffocation.

Dissolved oxygen in water is mainly the oxygen in the air on the surface of the water, and the oxygen released by organisms in the water through respiration. When there is less oxygen or too much living in the air on the surface of the water, it can lead to a lack of dissolved oxygen in the water, which can affect the fish.

2. High temperature weather

High-source chai temperature weather is also a condition that causes hypoxia in fish. When the temperature of the water rises to a certain level, it will lead to a decrease in dissolved oxygen in the water. At the same time, the metabolism of fish at high temperatures accelerates, and the rate of oxygen consumption will also accelerate, further exacerbating the hypoxia situation of fish.

Therefore, in hot weather, special attention needs to be paid to the living environment of fish, keep the water clean, and add fresh water in time to increase the content of dissolved oxygen.

3. The water flow is not smooth

Poor water flow is another cause of hypoxia in fish. When the water flow does not crack and run smoothly, the oxygen in the water will be unevenly distributed, and the fish will not be able to breathe adequately. At the same time, the poor flow of water also leads to the accumulation of waste and harmful substances in the water, leading to the deterioration of water quality and exacerbating the lack of oxygen.

Therefore, in the process of breeding fish, it is necessary to pay attention to the smooth flow of water, clean the filter regularly, and keep the water clean.

4. Overfeeding

Overfeeding is also a cause of hypoxia in fish. When there are too many fish in the water, there will be too much organic matter in the water, which will reduce the dissolved oxygen in the water. At the same time, overfeeding can also increase waste and harmful substances in the water, which can aggravate the hypoxia of fish.

Therefore, in the process of fish farming, it is necessary to pay attention to the appropriate amount of feeding, control the feeding density and feeding amount, keep the water quality clean, and avoid the occurrence of fish hypoxia.

1. Insufficient oxygen content

Fish breathe in water, and the lack of oxygen is one of the main reasons for the lack of oxygen in fish. The amount of dissolved oxygen in water is related to factors such as temperature, water flow, turbidity, salinity, etc. When the temperature increases, the dissolved oxygen content in the water decreases, and the slow water flow, high turbidity, and salinity can lead to a decrease in the dissolved oxygen content in the water, which may hinder the gas exchange in the fish.

The respiration of the fish and its need for oxygen are also affected by the size and species of the fish. In general, fish with larger bodies need more oxygen. Fish living in deep water are more susceptible to oxygen problems than fish living in shallow water due to their higher water pressure and smaller oxygen absorption area.

2. The feeding density is too high

When there is an excessive number of fish in a water body, the metabolism of the fish increases, which in turn increases its demand for oxygen. If the oxygen level in the water is not replenished in time, these fish will be in a state of hypoxia. Solutions include reducing stocking densities, increasing the amount of dissolved oxygen in the water, etc.

3. Water pollution

When the level of pollutants in a water body is too high, the oxygen content in the water body suffers. Organic buried matter and sulfide in the water body may affect the dissolved amount of oxygen in the water. In addition, if the fish tank or aquarium is used for a long time and the water body, filtration and other facilities are not regularly replaced, the pollutants in the water body will gradually accumulate, which will lead to a decrease in the oxygen content in the water, resulting in a lack of oxygen in the fish.

4. The water temperature is too low

Fish have different respiration and metabolic rates at different water temperatures. In an environment where the water temperature is too low, the metabolic rate of the fish is low, and the demand for oxygen is relatively small. If the water temperature drops too quickly or too low, it will cause the fish to cool down and thus slow down the metabolism.

Long-term hypoxia will cause serious harm to the fish body, easily lead to a variety of diseases, and die due to lack of oxygen. Heating the water is good for the health of the fish.

There is a lack of oxygen during the change of seasons. High temperature will actually lead to a lack of oxygen in the pond, the temperature is high, the oxygen in the air is not easy to integrate into the water, and the fish will increase the consumption of oxygen because of the high temperature, this high and low, the pond will naturally lack oxygen.

At this time, on the one hand, it is best to deepen the water depth of the pond, on the other hand, you can use an aeration machine, and then speed up the frequency of water change, so that a steady stream of living water can increase the oxygen content of the pond, so that the guarantee is higher.

The management of a fish pond is multifaceted, and the lack of oxygen in a newly built pond is relatively rare because it has not yet occurred in these conditions. If the older pond is often used, the chance of hypoxia will be higher, and it is necessary to start from all aspects to reduce this hypoxia.

Fish exchange oxygen in the water by their gills! When the oxygen content in the gills is less than the oxygen content in the water, the oxygen enters the gills through the principle of transparency! The red blood cells are then used as carriers to transport them to the body!

When the number of microorganisms or plankton in the water increases, a large amount of oxygen in the water is consumed, and the semi-permeable function cannot be realized! The fish begins to lack oxygen!

When the lack of oxygen is not severe, the fish will become unenergetic and swim slowly, and in more severe cases, the body will become tilted and the belly will be exposed. When the fish laugh and are short of oxygen, they can pour new water into the tank to replenish oxygen to the tank. It is also recommended to let the aeration pump be in working condition for 24 hours to ensure that the oxygen in the tank is sufficient.

When the lack of oxygen is not severe, the fish will become less energetic, swim slowly and float upwards from the water. If there is a persistent lack of oxygen, the fish will tilt and the belly will be exposed, which may lead to the death of the fish if the oxygen is not replenished in time.

When the fish is hypoxic, new water can be injected into the tank, because the dissolved oxygen content of the new water is higher, and part of the oxygen will be brought into the water body in the process of injection, and it is recommended to replace one-third of the water in the tank every 2 3 days to ensure that the oxygen in the tank is sufficient.

You can also use an aeration pump to supplement oxygen to the fish tank, and it is recommended to let the aeration pump work 24 hours to ensure that the oxygen in the tank is sufficient. If you don't want to keep it open, it's best to open it for a period of time in the morning and afternoon every day.

In the hypoxic environment, the fish will have a floating head, and will swim very slowly in the water and appear very unenergetic, and even turn out a white belly, and have a sinking head. Lack of oxygen can also cause ornamental fish to not eat, or to eat only a little at a time, without the slightest desire to eat. Prolonged food shortages can cause aquarium fish to become depressed, and some of them will jump out of the water and fall to the ground.

When it is found that the fish is in a state of hypoxia, you can also change the water in time to sell the ruler of the tank, which can also effectively increase the amount of dissolved oxygen in the water. ​