CATDOLL : CATDOLL: How to raise sea crabs

How to raise sea crabs

1. Pond conditions for breeding: For breeding in the north, medium or small ponds with an area of ​​10-20 mu are generally suitable. Ponds near the sea with sufficient water sources, no pollution, abundant small fish, shrimp and shellfish resources, and convenient water inlet and outlet should be selected. The pond depth should be more than 5 meters. The bottom of the pond is preferably muddy and sandy, and the bottom of the pond should be covered with sand about 15 centimeters.

2. Preparation before breeding:

(1) Pond maintenance: Pond maintenance mainly involves removing excess silt from the bottom of the pond, loosening and exposing the bottom of the pond to the sun, and also repairing supporting facilities such as pond embankments, gates, and canals.

(2) Setting up obstacles: In order to make it easier for the crab seedlings to rest and hide, after the pond is repaired, obstacles such as cement pipes, tiles, and bamboo tubes should be placed at the bottom of the pond.

(3) Add water and breed bait organisms: Half a month after the pond is cleaned, water can be added. In order to prevent some harmful organisms from entering the pond, seawater can be filtered with a 60-mesh silk screen. The depth of the pond water is generally maintained at about 80 cm. After the pond is filled with water, fertilizers should be applied to breed bait organisms. Generally, N fertilizer is 1.5 kg/mu, and P fertilizer is 0.3 kg/mu. The transparency of the pond water should be maintained at about 30 cm.

Including pond renovation and drug cleaning. The pond renovation is carried out after crab harvesting in late autumn. The pond water is drained, silted and exposed to the sun. In the early stage of silt removal, mud pumps are used to pump out the silt, and in the later stage, bulldozers are used to level the pond. A circular ditch is left around the pond, with a width of 2~4m and 30~40cm lower than the beach surface. Expose for more than half a month to fully oxidize the pond bottom, and at the same time repair the pond embankment, gates, channels and other supporting facilities.

1. It is best to use a fish tank with a lid to prevent crabs from escaping. Plant a water plant, put some pebbles and sand, and simulate the wild living environment of crabs more realistically. Crabs are also burrowing animals, so it is best to provide a cave. Pick up a tile, wash it and put it in the fish tank and let it live in it. Crabs also need to bask in the sun, but not for too long. 2. Feed crabs with bread crumbs, potato crumbs, steamed bread crumbs, rice, snails, small fish and shrimp and other foods. 3. Change the water once a week. It is best to use sea water. If you don’t have it, use tap water that has been exposed to the sun for two days and add some salt. The water should cover the crab shell. 4. The crab shell turns yellow when it sheds its shell, and its body becomes soft after shed. It should be kept separately from other crabs to avoid cannibalism. And feed more meat food, such as small fish and shrimp. If the manuscript is successful, they will bring you a lot of fun. I hope I can help you, my friend.

1. Water quality management: In July, change the water every 2-3 days; in August and September, change the water every 1-2 days; in October, change the water every 4-5 days. The specific amount of water to be changed and the interval between water changes should vary according to environmental factors such as weather and water temperature.

2. Feeding: Swimming crabs are omnivorous shellfish, and they mainly feed on fresh low-value fish, shrimp, shellfish, crabs, etc. The amount of feed per day varies according to the size of the crabs. In the early stage of breeding, it is generally fed about 8% of the total weight of the crabs, 12% in the middle stage, and 5% in the later stage; when the water temperature drops to 10~15℃ in autumn, the daily feed amount should be 3% of the total weight. Feeding should be done according to the principle of feeding once in the morning and evening, feeding less in the morning and more in the evening. When the average water temperature of the day is below 10℃, no feed is needed.

3. Pond inspection management: The pond should be inspected once in the morning and evening. During the inspection, the feeding and activity of swimming crabs should be carefully observed, the changes in the pond water should be noted, the residual bait in the pond should be checked, and the feeding amount and water change amount should be adjusted in time. Attention should be paid to weather changes at any time, and preparations should be made for flood and typhoon prevention. The gate nets and dams should be checked regularly for damage and holes, and any problems should be repaired as soon as possible.

Sea crabs are swimming crabs. When they leave the high-salt and high-oxygen environment in the ocean, their survival rate is greatly reduced. The biggest difference between sea crabs and river crabs is that although the survival rate of sea crabs is lower, swimming crabs that die within a short period of time and do not emit odor can still be eaten by humans. Their rich nutrition and tender taste are no less than fresh crabs.

Can swimming crabs be raised in fresh water? Do swimming crabs have crab roe?

1. Swimming crabs cannot be farmed in freshwater because they live in seawater. When they leave the high-salt and high-oxygen environment, their survival rate will be greatly reduced. 2. Generally, swimming crabs will have crab roe from August to November each year. 3. Swimming crabs are also called white crabs, three-spotted swimming crabs, pistol crabs, sea crabs, etc. They are arthropods. 4. The navel of male crabs is pointed and smooth, the claws are long, and the shell surface is generally green. The navel of female crabs is round and has fluff, the shell surface is ochre, and some shells have spots.

1. Can swimming crabs be raised in fresh water?

1. Can swimming crabs be raised in fresh water?

Swimming crabs cannot be raised in fresh water. They live in seawater, and their survival rate will be greatly reduced when they leave the high-salt and high-oxygen environment.

2. How to breed swimming crabs

(1) Prepare the pond

① Prepare salty and unpolluted water first, and the water depth should not exceed 6 meters when filling. You can put some small fish and shrimp in the water to provide natural food for swimming crabs.

② When building a pond, you can leave a part of the land area to satisfy the crabs' preference for sunbathing on the shore. At the same time, you can spread a proper amount of sand on the land to satisfy the swimming crabs' habit of throwing sand.

(2) Pond disinfection

① First drain the water from the pond and remove the silt at the bottom, leaving only a small amount. You can also put some containers such as water bottles at the bottom of the pond to provide a more suitable adjustment space for the swimming crabs.

②After cleaning the pond, add an appropriate amount of water and fertilizer, and after a few days, you can stock the swimming crab seedlings.

(3) Release of crab seedlings

① When releasing the crab seedlings, they should be fed separately according to their size, because swimming crabs like to fight for food.

②The temperature of the pool cannot be lower than 20℃, and the range should not be too large. The water temperature must be strictly adjusted according to changes in air temperature.

(4) Daily management

① Adjust the water temperature and replace the water in the pond in time. When the weather is hot, change the water twice a week. When the weather is hot, the appetite of swimming crabs will decrease. You can feed some small fish and shrimps that swimming crabs like.

② When there is less oxygen in the pool, it may cause large-scale death of swimming crabs. Pay attention to the oxygen content of the water.

2. Does the swimming crab have crab roe?

1. Does swimming crab have crab roe?

Swimming crabs have crab roe, which usually occurs from August to November every year.

2. Habits of swimming crabs

(1) The swimming crab is also called "white crab", three-spotted swimming crab, pistol crab, sea crab, sea crab, etc. It belongs to arthropods.

(2) The male swimming crab has a pointed and smooth navel, long claws, and a green shell surface. The female crab has a round and hairy navel and an ochre shell surface or spots.

(3) Swimming crabs have high nutritional and economic value and are suitable for marine aquaculture. Their body color will vary with the surrounding environment.

(4) The mating season of swimming crabs is from April to May to early winter in the Yellow Sea and Bohai Sea, and from March to April to November to December in the coastal areas of Fujian. In addition to mating between sexually mature individuals, females that have not yet fully developed are sometimes also receptive to mating.