Density vannamei shrimp as a simple number, contain many complex factors directly affect the success or failure of crop. Determining stocking densities reasonable, not only is the math about the number of which is still an art that requires farmers to have the careful consideration, based on many different factors. This article will help you to find out the answer to the question: how to choose density vannamei shrimp matching to achieve high economic efficiency the most?

Density vannamei shrimp affects how?

Shrimp farming in low density often have a better development in comparison with high density. Research from the National center for varieties of seafood North shows vannamei shrimp-like disease in the tank composite with density from 40 to 80 children lead to different results. The survival rate of shrimp descending from for 79.7% (40) to 70,3% (80 children), and the percentage of men increased from 7,27% up to 12.9%.

System, feed conversion ratio also changes, ranging from 1,39 to eur 1.47 when density increases. The results showed that the density of shrimp high reduced survival rate, increased stools and the coefficient of conversion of food, affects the quality and size of the shrimp. Therefore, the optimal density is very important to achieve high economic efficiency.

What factor affects the density vannamei shrimp 

• Pond area: Big pond have the ability to accommodate density shrimp more small pond.
• Water quality: Clean water and quality assurance will help to support shrimp farming with high density.
• Nutrition: When supplied with enough nutrients, shrimp can grow healthy whether feeding with high density.
• Climate, weather and when to drop like: Depending on weather conditions, as the rainy season or the dry season, the density of breeding may need to be adjusted to fit.

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Density vannamei shrimp suited to optimal performance

Density vannamei shrimp in each model feed

Each model shrimp density drop is different, so need to adjust to the conditions of the pond to avoid the situation shrimp poorly developed or disease outbreaks. The experts recommended stocking density of shrimp prepared based on the following factors:

• Model semi-intensive: Drop from 10 – 15/m2 with a pond has a depth of less than 1m.
• Model intensive: Drop from 45 – 60/m2 with a pond depth of 1.2 m.
• The model a super intensive: Drop from 200 – 250/m2 with a pond depth of over 1.4 m.

For the pond size, average density drop is the ideal under 100/m2, usually 60 – 80/m2. Children should select the shrimp of good quality in order to increase the survival rate and disease prevention.

Density vannamei shrimp in each stage

Phase 1: National eggs and larvae
In the first stage, vannamei reared the central nervous system with density quite thick, about 2000 – 4000 I/m3 at the camp system. After experiencing 18 – 20 day nursery, the shrimp will be transferred to the pond, where the density of breeding reduced to about 500 – 700 fish/m3 in order to ensure ideal conditions for the growth of shrimp.

Phase 2: Shrimp, mature
In this stage, the density of cultured white leg shrimp is adjusted depending on the area of the pond. With large pond from 1500 – 2000 m2, the density can be reached from 300 – 500/m2. After about 25 – 30 days of culture density, the shrimp will be reduced down to 100 – 150/m2 in order to improve living conditions, increase the survival rate and growth rate.

Density vannamei shrimp is 1 of the key factors affecting the results of the process of cultivating. Pick density suitable not only promote the development of shrimp which also helps reduce the risk of disease outbreaks, optimize costs and increase profits. At the same time, maintaining the environmental factors, nutrition, and health of the shrimp is the key to achieve high-volume production. Interventions quickly when shrimp quit eating is also essential to maintain productivity and health of shrimp.