The Effect of Dissolved Oxygen on Aquaculture

1. The direct impact of dissolved oxygen on aquaculture organisms

In order to maintain normal life activities, aquaculture organisms must constantly breathe. Its respiration rate of oxygen consumption is related to various internal and external factors. If the dissolved oxygen in the water is low, the fish and shrimp will swim to the surface to breathe the surface layer of dissolved oxygen, a phenomenon known as "floating head", if this time still do not take measures to increase the oxygen of the first aid, may lead to the death of a large number of fish and shrimp.

However, some farmers may not know, when the water body of dissolved oxygen is low, although not reached the point of asphyxiation, will not cause an acute response of fish, but will cause chronic harm, resulting in a reduction in fish and shrimp intake, growth slowdown or even stagnation, physical decline in susceptibility to disease, we call this phenomenon "sub hypoxia".

Therefore, many farmers reflect their own species of growth is not big, do not eat and sick and other problems may be caused by suboxia. Therefore, farmers can choose to use dissolved oxygen sensors to monitor the oxygen content in the water.

2. The effect of dissolved oxygen on the chemical composition of water quality

In a water body with sufficient dissolved oxygen, the organic matter in the water body is oxidised more completely, and the final products are CO2, H2O, and other non-toxic and low-toxic substances. But if the dissolved oxygen in the water body is not enough, the organic matter oxidation is not complete, will produce organic acids and amines harmful substances, nitrite, hydrogen sulfide is the case of insufficient dissolved oxygen produced. Therefore, when the aquatic environment nitrite, hydrogen sulfide high, the first thing to do is to increase oxygen.

3. The effect of dissolved oxygen on water microorganisms

Algae photosynthesis during the day to produce oxygen, but at night, algae in the absence of photosynthesis will also carry out respiration to consume oxygen, therefore, if the dissolved oxygen is insufficient, it is very likely to occur at night inverted algae.

Dissolved oxygen will also have an impact on the bacterial phase of the water body, we commonly used in the aquaculture process of beneficial bacteria bacillus, etc. are aerobic bacteria, if the water body is not enough dissolved oxygen, they will not be able to play a role, and even because of the competitive inhibition of anaerobic harmful bacteria instead of the original dominant position, so that the breeding of fish and shrimp and other easy to get sick!