CATDOLL : CATDOLL: What is the difference between Chinese shrimp and whiteleg shrimp?

What is the difference between Chinese shrimp and whiteleg shrimp?

The whiteleg shrimp is a euryhaline shrimp that is farmed from south to north, in freshwater ponds and seawater ponds. It is the main shrimp farmed variety in my country.

However, there is a big difference in taste between whiteleg shrimps farmed in freshwater and those farmed in seawater. Generally speaking, whiteleg shrimps farmed in seawater have a stronger taste and are more delicious. The higher the salinity, the better the taste of the shrimps.

Differences between Chinese shrimp and Penaeus vannamei

1. Different distribution ranges: Chinese shrimp are distributed in the Bohai Sea of ​​my country; whiteleg shrimp are distributed in the tropical waters along the western Pacific coast of the United States, from the Gulf of Mexico to central Peru, and are more concentrated in the waters near Ecuador.

2. Different morphological characteristics Female Chinese shrimps are generally 18 to 23 cm in length, while males are 13 to 17 cm in length. They are flattened, with a thin shell and a smooth surface. Female shrimps are usually larger than male shrimps.

Which is easier to raise: Penaeus vannamei or Penaeus vannamei

Compared with Penaeus vannamei, other species are also difficult to breed, such as Penaeus monodon and Penaeus japonicus. It is even more difficult to breed Chinese shrimp. It is not easy to breed successfully even if 20 shrimp are raised in one acre. Why is Penaeus vannamei difficult to breed?

One of the fundamental reasons is determined by the feeding habits of Penaeus vannamei. Penaeus vannamei has poor selectivity in feeding, and except for reducing feeding activities after 10 pm, it is in feeding activities most of the time, and its digestive tract is in a full state most of the time. It not only eats feed, but also organic debris in the pond and bacteria attached to the organic debris, etc., and eats a large amount of corrupt organic debris and conditional pathogenic bacteria.

The second fundamental reason is the eutrophication of breeding ponds and water intake areas, which leads to the production of large amounts of toxic algae such as blue-green algae and dinoflagellates. These toxic algae directly poison the farmed shrimps and produce secondary infections such as bacteria.

The third root cause is climate change. Ecosystem disorder is generally induced by typhoons, temperature fluctuations, heavy rains and other climate changes, resulting in disorders of microalgae-driven ecosystems and microorganism-driven ecosystems, increases in ammonia nitrogen and nitrite nitrogen, and the proliferation of conditional pathogens.

For example, the direct cause of white feces syndrome in white shrimp is the disorder of digestive tract microbial community, and the root cause is the disorder of reduced diversity of microbial community in the bottom layer and water particles of the aquaculture ecosystem and the non-selective feeding characteristics of shrimp.