Vannamei Shrimp Salinity and How to Control Its Stability during Cultivation
Vannamei shrimp, also known as white leg shrimp, are shrimp native to the Pacific Ocean that can tolerate various levels of salinity. However, the optimal salinity for vannamei shrimp is around 15-25 ppt with a pH level of 7.5-8.5.
If the water salinity is too high, vannamei shrimp can become stressed, and their growth will be less than optimal. On the other hand, if the salinity is too low, the shrimp cannot absorb enough oxygen resulting in respiratory problems.
What is Water Salinity?
Water salinity refers to the amount of salt content in seawater, river water, or lake water which is calculated in ‰ (thousand/ppt). For vannamei shrimp, the optimal range of water salinity is around 15-25 ppt which allows the shrimp to absorb sufficient oxygen.
The salinity of vannamei shrimp must be monitored and tested regularly during cultivation. This aims to ensure that the salinity rate remains within the optimal and stable range.
If the salinity is too high, it can be reduced by adding fresh water to the system. Meanwhile, if the salinity is too low, it can be increased by adding a brine or salt mixture to fresh water.
How to Control the Stability of Pond Water Salinity
Maintaining the stability of vannamei shrimp salinity during cultivation is very important. This is because the saltiness of the water directly affects the health and growth of shrimp.
For vannamei shrimp, the ideal water salinity is around 15-25 per thousand (ppt). At this salinity level, vannamei shrimp can absorb sufficient oxygen through their gills and are less likely to experience stress or disease.
To ensure that the salinity of the water is at the proper level, farmers need to test and monitor the water regularly using a salinity meter or hydrometer.
Usually, the best time to measure salinity is in the morning and evening. Because, at these times, the salinity can change due to the influence of water evaporation by sunlight. In addition, when it rains, there is usually a decrease in the salinity due to the volume of rainwater entering the pond.
Not only that, but farmers also have to keep the water clean and have a stable dissolved oxygen content. This is so that the growth and health of the shrimp are appropriately maintained.
If the vannamei shrimp salinity is too high during the measurement, the farmer can anticipate this by adding fresh water up to the initial height before evaporation occurs.
Meanwhile, farmers can dispose of fresh water on the pond’s surface if the water salinity is low. This is because freshwater has a lower density than salt water, so freshwater is on the pond’s surface.
By following these guidelines and properly managing water salinity, shrimp farmers can help ensure the health and growth of their vannamei shrimp, leading to higher yields and profits.
Cre: delosaqua.com
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Ngày đăng : 02/02/2025
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