How long does it take for a pike crab to lay its eggs, and how long does it take for a pike crab to

10-12 hours.

Barracuda crab is a kind of marine creature, it will die soon after leaving the seawater, if it is packaged and transported by itself, the general pike crab can only survive for about 10-12 hours, if the vitality of the pike crab is relatively strong, then the survival time may also be extended, usually not more than 1 day; However, if there are professionals to pack and transport them, the crab may survive longer.

About 18 months.

After birth, female crabs need to go through 18 months of growth, and when their gonads are fully mature, they can start laying eggs. Crab eggs will stick to the female belly hair in strings and accumulate on the abdomen until the larvae hatch, at this time the crab is also called "egg-holding crab". River crabs have a stronger spawning ability than sea crabs, and can lay tens of thousands to millions of eggs at a time, and can lay 2-3 times.

Crabs usually lay eggs about 20 days after pregnancy, and it usually takes 4 months for the eggs to hatch larvae. Newly hatched crabs are small and need to be molted 5 times before they grow into crab seedlings, and then molt again to become juveniles. Crabs, like shrimps, shed their shells during growth, during which time they become very soft, take 1-2 days to harden, cannot be fed, and may be eaten by other animals.

Generally for a few hours, he is not like a crab, a crab, can live for four or five days, a crab, a crab, his life is not so stubborn.

Barracuda crabs are generally raised for more than ten days, and if they die, they have to be eaten as soon as possible, and the meat will be like cotton for a long time, which is not delicious, affecting the taste and the possibility of diarrhea and poisoning.

In 10-12 hours, the crab is a marine creature that dies immediately after leaving the sea, and if the crab is more tenacious, it will survive longer.

The temperature is low for about half a month, and it is generally 10 days and about 7 days after the temperature is high.

The pike crab express can live for a day is a bunch of nonsense, no pike crab can do it, no matter how good the pike crab is, as long as there is no water and oxygen, it can only live for about half a day.

It takes about a week for the crab to come out of its shell.

Crabs shed their shells about 18 times in their lifetime, and big-eyed larvae to crab seedlings shed 5 times. Crab fry to larvae crab shelling 3 times; Shelling of young crabs to juvenile crabs 5 times; Juvenile to adult crabs shell 5 times. Each shelling is the result of the growth and development of the crab, and when the body tissue grows and nutrients accumulate to a certain extent, it is necessary to molt (skin).

Crabs generally resume eating after 3-4 days after shedding their shells, and the crabs that have just been shelled are weaker and have low demand for food and nutrients, so they can be allowed to adjust themselves for a period of time, and then feed them when they start to walk.

Notes:

1. Before shelling, the crab can be fed animal bait, and the bait can be added to the shelling to shorten the shelling time, because the crab shelling takes a long time, during which it is easy to kill each other and reduce the survival rate.

2. If some crabs have been shelled, it is necessary to increase the calcium content in the water in time, and 5-10 kg of quicklime can be sprinkled on each mu of pond, or an appropriate amount of ionized calcium can be sprinkled.

Interestingly, the pike crab is a master of shelling, and the juveniles hatched in the spring grow quickly, and when they are shelled 8 or 10 times and weigh about 150 grams, they reach sexual maturity and carry out mating activities. It takes 15 to 30 minutes for them to shed their shells each time, at which time predators tend to take advantage of the situation and eat the individual, and the weak and sick individuals will also eliminate themselves in the shelling, and each shelling is a life-and-death struggle. Every time the juvenile crab sheds its shell, the length and width of the nail can be increased by 30%, and around the Mid-Autumn Festival, the crab can grow into a larger fat crab, commonly known as "the autumn wind raises the crab fat", that is, the best season for catching.

Barracuda crabs can live up to two hours out of the water.

Barracuda crab, commonly known as "white crab" in some places. Because the cephalothorax is a shuttle, it is called a shuttle. The ** of the carapace has three protrusions, so it is also called "three-wart pike crab", which belongs to arthropods.

Males have a pointed and smooth umbilicus, with long chelae and a bluish shell surface; The female has a round umbilicus with villi hairs, and the shell surface is ochre or spotted. The crab meat is fat and delicious, has high nutritional value and economic value, and is suitable for temporary breeding and fattening of seawater.

Nutritional value:

The meat of the crab is delicate and white, rich in protein, fat and a variety of minerals. The pike crab is the most robust in the winter season, generally weighing about 250 grams and up to 500 grams. The female crab is covered with red paste and has an excellent taste.

Barracuda crab can be eaten fresh, or steamed, fried, or fried, or all two halves of stewed bean paste, or fried rice cakes with crabs, stir-fried pickles, boiled tofu, is a common dish on the table of residents in coastal areas.

It can also be pickled, that is, the fresh pike crab is soaked in salt brine and can be eaten after a few days, commonly known as "fresh wind crab". In the past, fishermen often selected live crabs full of paste because of the high yield of pike crabs, and the yellow was cut into a bowl, and the wind and sun made it solidify, which became "crab roe cake", which had a good flavor, but the yield was small, and it was difficult for ordinary people to taste this taste.

Barracuda crabs generally live for up to 3 years. The pike crab hatches into a larvae, and lives in plankton, a total of 5 stages, the 5th stage of molting enters the big-eyed larval stage, and then becomes a juvenile crab after 1 molt, from small to about 20 times of molting. The general lifespan is about 3 years.

The three-wart crab grows quickly and can weigh up to kilograms.

Barracuda crabs are found in Japan, Korea, the Malay Archipelago, the Red Sea and most of the coasts of Chinese mainland. The body color of the pike crab varies depending on the surrounding environment. Individuals living on the sandy bottom have a light grayish-green cephalothorax, a round white spot in the anterior gill region, a purplish-red chelicerae with white spots, and a part or all of the ventral surface white.

The survival ability of the pike crab is very weak, and it will die quickly after leaving the sea, so in order to make the pike crab live longer, it is necessary to keep the crab body moist at all times. Barracuda crab relies on gills to breathe oxygen in the water, and it is found that the crab body is dry, so it is necessary to drench the water in time, generally when the temperature is about 20 degrees Celsius, the pike crab can survive for about 7 days.

It is advisable to have 1000-1500 per mu. Feed feeding: feed live shellfish, trash fish, shrimp.

Water quality management: keep the water temperature at 25-32, and change the water frequently in summer.

1. Pond conditions

When breeding pike crabs, the area of the pond is generally 10-20 acres of small and medium-sized ponds, and it is necessary to choose a pond near the sea area with sufficient water source, no pollution, rich resources of small miscellaneous fish, shrimp and shellfish, and convenient inlet and drainage, the pond depth is more than 5 meters, and the substrate at the bottom of the pond is better with sediment, and then the bottom is spread with sand about 15 cm.

2. Scientific seedling

Choose natural and healthy pike crab seedlings, generally in late May or mid-June of each year, pay attention to stocking, must control the density, to 1000-1500 per mu is appropriate, so as to avoid the phenomenon of cannibalism of pike crabs.

3. Feed feeding

The bait species of the pike crab are mainly low-value fresh shellfish, trash fish, shrimp, and the amount of bait can be determined according to the change of water temperature and feeding rate.

4. Water quality management

During the breeding period of pike crabs, the water quality index range is generally 18 -33 water temperature, 25 -32 is the fastest growth, pH value, salinity 18-32, dissolved oxygen is greater than 3mg l, pool water transparency is kept at 30cm-40cm, pay attention to the hot weather when the water is changed frequently.