When is the fattest swimming crab on the market? What are the breeding skills?

Portunus crab, also known as white crab, because of its two sharp middle named. The shell is thin and the meat is thick. The meat is white and firm. It also has the fragrance of seawater. It is a treasure among seafood. So, when is such a delicious swimming crab the fattest? What are the farming techniques?

1. Culture skills of swimming crab

1. water quality

The survival rate of swimming crabs is lower in ponds with high transparency and crystal clear bottom. Therefore, in the breeding process to appropriate fertilizer water, to grasp the relationship between good color, transparency and water change. Before July, the transparency can be controlled at about 30 cm, and the daily water exchange rate is 10-20%; after July, the transparency of the pool water can be controlled at about 40 cm, and the daily water exchange rate is 20-30%.

2. stocking

The stocking density should not be too large, otherwise there will be food competition and fighting between crabs, which will affect the growth and survival rate of crabs. The amount of stocking should not be too small. If it is too small, it will cause crabs to reduce their vitality and easily affect water quality. Generally 80-100/kg crab seedlings, stocking density should be controlled at 1000~1500/mu.

3. daily management

Strengthen the inspection of the pond in the farm and pay attention to the change of water quality at any time. If it is in summer, the frequency of water change should be as high as possible. If it is in winter, the frequency of water change can be slowed down slightly. As the temperature is lower in winter, the appetite of swimming crabs will be worse. Some remaining food residues should be cleaned up in time to avoid affecting the change of water quality. When strengthening the inspection, we should see if there are any abnormalities. If there is a problem, make a timely remedy.

4. disease Control

In order to prevent the stress reaction of swimming crab, it is necessary to disinfect the water body regularly with quicklime, bleaching powder and chlorine dioxide to improve the water quality and substrate quality and maintain the stability of the culture water environment. Feed high-quality fresh bait, add appropriate disease-preventing drugs to bait during high temperature, suggest using antibacterial and antiviral Chinese herbal medicine, such as allicin and other bait.

Second, when is the swimming crab the fattest

As we all know, around the Mid-Autumn Festival is the best time to eat crabs, although the Mid-Autumn Festival is to eat hairy crabs, but swimming crabs are also the most fat at this time. Zhejiang Zhoushan swimming crab generally began to appear in August, at this time fat fat thick, for those who love seafood is simply the happiest season.

However, things are rare for expensive, just listed live crab prices are still high. When more farms are open to fishing and a large number of raw crabs flood into the market, not only the crab meat is fat and attractive, but also the price returns to a more appropriate level after the market adjusts itself. At this time, the crab is truly inexpensive.

Influenced by the taste of some provinces in the central part that like to eat spicy food, crab meat now has some heavy cooking methods, such as adding chili stir-fry and thickening with sauce. But the easiest and most traditional way to preserve seafood flavor is to steam it. Wash and plate the live crabs bought, add hot water to the steamer, put a plate of lively swimming crabs on the pot, cover the lid, wait until the crabs turn from gray to red brown, and then take them out of the pot. This cooking method preserves the deliciousness of crab meat itself to the greatest extent, so as not to waste such a large and good live crab in season.

Now into the market time of swimming crab, Zhejiang fishing grounds have begun to catch six times, in the coastal areas of the market can also buy fresh fat swimming crab, recently went to the coastal cities to play friends have a good taste.