CATDOLL : CATDOLL: Comparison between white shrimp and salt pan shrimp

1. Comparison between Penaeus vannamei and salt pan shrimp

Salinity, distribution range.

1. Salinity. The whiteleg shrimp grows in fresh water with a salinity of 2‰, while salt pan shrimp grows in high-salinity seawater.

2. Distribution range. Penaeus vannamei is mainly distributed in the tropical waters along the Pacific coast of western United States, from the Gulf of Mexico to central Peru, with a higher concentration in the waters near Ecuador. Salt pan shrimp is mainly distributed in the coastal areas of the natural solar salt fields of Shandong Jiling Island.

2. Can Penaeus vannamei be raised in freshwater? What conditions are required?

As early as the successful development of the technology for large-scale breeding of whiteleg shrimp, it is not a problem to provide fresh whiteleg shrimp all year round. Therefore, whiteleg shrimp can be raised in fresh water, but the following conditions must be met:

The importance of shrimp fry

The key is to select high-quality shrimp fry, and to adopt a reasonable stocking density. After stocking, measures must be taken to protect and strengthen the fry. The water depth is generally required to be maintained at 60 cm for about 10 days, and then add water 1-2 times every week. The depth of each water addition should be maintained at 10-20 cm, and the deepest should be maintained at 1.6 meters. After the water is full, the bottom water should be regularly drained.

It is better to release the shrimp fry in the morning when the weather is clear. When the sun shines on the water, about 50-60 cm of water should be released to enrich the water with oxygen, accelerate the molting of the shrimp, and help the growth of North American and South American shrimp.

Before shrimp fry are transferred, they need to be desalinated and cultured. Generally, the relative density of seawater is 1.02 when the fry are born. Only after the shrimp fry are desalinated can they be released. Therefore, the gradual desalination time is generally 5-7 days, the salinity is maintained at about 3%-5%, and the eating and external reactions are normal and sensitive. The shrimp fry are transparent and have a smooth surface. Only in this way can they be considered good shrimp fry that can adapt to desalinated waters.

The importance of environment

It is well known that Penaeus vannamei has strong adaptability. It can be raised in any aquaculture waters, whether it is river water, lake water, etc. As long as the water quality, nitrite, PH and other indicators meet its requirements and the water quality is not polluted, this is the first condition for its aquaculture. Freshwater aquaculture of Penaeus vannamei must be controlled, and salinity below 1% cannot be developed. If the aquaculture water needs to be disinfected, it is necessary to choose a disinfection product that is non-irritating and has no side effects on the aquaculture objects.

The importance of scientific feeding

The feeding level should be controlled accurately. If the feed is too high, it will cause water quality damage and increase costs. If the feeding level is too low, it will cause the shrimp shell to be gray and the shrimp body to be thin, which will affect the quality of the shrimp. Attention should be paid to the even combination of various nutrients. Protein, vitamin C, calcium, phosphorus, etc. are indispensable.

Disease control

As we know above, the adaptability, disease resistance and mortality rate of white shrimp cannot be underestimated compared with other seafood, so we must eliminate pathogens from the shrimp seedlings, and we must not take it lightly during the breeding process to prevent problems before they occur.

Can whiteleg shrimp be raised in freshwater? I believe you already know the answer to this question. When raising whiteleg shrimp in freshwater, you must pay attention to important factors such as shrimp fry selection, environment, feeding, disease prevention, etc., so that the probability of successful breeding will be increased.

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3. How to raise whiteleg shrimp if the water in mountainous areas has no salinity? Can it be raised by adding salt to fresh water?

Difficult to raise, easier to raise in fresh water. Living habits: The white shrimp has a thin shell and a fat body, delicious meat, high meat content, and rich nutrition. The white shrimp has strong adaptability. Its natural habitat is muddy seabed, with a water depth of 0-72m. It can grow in waters with a salinity of 0.5-35‰. The allowable salinity range for 2-7cm juvenile shrimp is 2-78‰. It can grow in waters with a water temperature of 6-40°C...3357