CATDOLL : CATDOLL: How do you distinguish between farmed and wild crabs?

1. How to distinguish farmed crabs from wild ones?

How to distinguish wild crabs from farmed crabs

For example, farmed red crabs are kept in mud ponds, so there will inevitably be mud stuck between the limbs of the crabs. This makes it easiest to distinguish them from wild crabs, which have clean shells.

Although the quality of farmed crab meat is not as good as that of wild crabs, it is a great blessing for people who like to taste crab roe.

Not all red crabs sold at fishing ports along the north coast are local. Judging by the materials used to tie the crab legs, those tied with coconut fiber are mostly from Southeast Asia, those tied with straw ropes or rush are from mainland China, and those tied with "more advanced" materials such as plastic ropes or water-soaked coarse cloth strips are from Taiwan.

2. Can hairy crabs be farmed in rivers?

cannot,

The following is the answer from Suxiege editor

The hairy crabs are suitable for shallow waters with abundant aquatic plants, about 3 to 5 meters in length, and they must be suitable for seine nets. Rivers are not suitable for seine nets, and the hairy crabs will run away, resulting in great losses.

The hairy crabs eat a lot of carrion, and the river has water flowing through it every day, so it is difficult to find the food that the hairy crabs need, and it is not suitable for breeding hairy crabs.

Purely hand-typed, hope to adopt

3. What are the breeding standards for Yangcheng Lake hairy crabs?

There are breeding standards for Yangcheng Lake hairy crabs. In order to further standardize Yangcheng Lake hairy crab enclosure breeding, implement standardized pollution-free scientific breeding measures, improve the quality of river crabs, and promote breeding production and efficiency, the Yangcheng Lake Fishery Management Department and the Yangcheng Lake Crab Industry Association jointly formulated the "Yangcheng Lake Hairy Crab Enclosure Breeding Regulations" in 2004 in accordance with the industry standard NY/T 5065-2001 of the People's Republic of China and the local standard DB32/T 372-2000 of Jiangsu Province.

Yangcheng Lake Crab King Mall

4. In which Yangcheng Lake are the Su Laobo hairy crabs farmed?

Mr. Su's hairy crabs are raised in East Lake. The 180,000 mu of Yangcheng Lake hairy crabs are divided into East Lake, Middle Lake and West Lake. East Lake is the best water area for Yangcheng Lake hairy crabs. In addition, the government management is also very standardized, and the water area management of East Lake is also relatively good. However, each crab farmer has different breeding techniques and methods. Therefore, there are differences in breeding in the same water area. At the same time, there is such a standard that 70% of the 100 or 1,000 crabs caught from Yangcheng Lake hairy crabs must meet the quality standards. In this way, the standard specifications selected by each company may not be unified. Some companies select another 70% on the basis of 70%, which is more strict, and the selected crabs are of the best quality. Therefore, the hairy crabs from Yangcheng Lake are still different.

5. Why can’t hairy crabs be raised for a few more years to make them bigger?

The hairy crabs must be sold within one year of breeding. They will die naturally after breeding. This is the life cycle of the hairy crabs.

The naturally grown hairy crabs need to go through two long migrations in their lifetime. However, this is not the case for our artificially cultivated hairy crabs, because they are transported to different locations required in their life stages.

Due to the various water conservancy projects built by humans, it is now difficult for the hairy crabs in the Yangtze River system to complete their migration and reproduction.

This has resulted in the extremely low reproduction rate of hairy crabs in natural waters, which has also led to the fact that most hairy crabs today are artificially bred.

So, those crabs, which were originally scarce, have become more and more popular now because we have overcome the technical difficulties in artificially breeding hairy crabs, which has led to the rapid development of my country's artificial breeding industry of hairy crabs.

It is precisely because of the rapid development of the artificial breeding industry of hairy crabs that hairy crabs have entered thousands of households. Only then can we experience the delicious taste of hairy crabs.

The artificially cultivated hairy crabs in the Yangtze River system are mainly divided into three parts.

The first part starts from Sheyang, Jiangsu Province. Because the hairy crab larvae just hatched from the mother crab have not developed complete gills, they cannot survive out of water for a long time.

Therefore, we have to wait until the lungs of the hairy crab larvae are fully developed, that is, it reaches the megalopa stage in the life of the hairy crab. At this stage, because the gills are fully developed, it can live out of the water and is convenient for transportation. Therefore, it is also called crab seedlings.

The second step is to transport them to Chongming, Shanghai. Because the hairy crab seedlings can only shed their shells in fresh water, they need a fresh water environment, which is also a transit station in the life of the hairy crab.

The reason why hairy crab seedlings are not directly produced in fresh water is that mature hairy crabs will only mate and lay eggs in light salt water with appropriate salinity and oxygen content. This results in the hairy crab larvae being produced in light salt water.

After the hairy crabs are grown into adults in Chongming, they will be transported to Yangcheng Lake for breeding. During this period, the weight of the hairy crabs will increase rapidly.

By the ninth and tenth month of the lunar calendar, the female and male crabs have reached sexual maturity, and the crab roe and crab paste of both male and female crabs have become very rich, which is when the hairy crabs are ready for sale.

Therefore, if hairy crabs are not sold within one year, they will die naturally, because the lifespan of hairy crabs is one year. Even if they do not reproduce, lay eggs or mate, hairy crabs will die within a year.

Therefore, if you are not planning to cultivate crab seedlings, you must sell the hairy crabs between September and March of the following year in the lunar calendar, otherwise you will lose money.