CATDOLL : CATDOLL: Can swimming crabs be farmed? Attached are the farming methods and conditions

Can swimming crabs be farmed? Attached are the farming methods and conditions

1. Swimming crabs can be cultured. 2. Prepare salty and pollution-free water. The depth of the pond should not exceed 6 meters. Put some small fish and shrimps in it. 3. Reserve a part of the land area and cover it with a proper amount of sand so that the swimming crabs can bask in the sun and throw sand. 4. Drain the water in the pond and clean the silt at the bottom. You can place some coarse containers such as water bottles at the bottom of the water. 5. Put seedlings of different sizes separately. The water temperature in the pond should not be lower than 20℃.

1. Can swimming crabs be farmed?

1. Can swimming crabs be farmed?

Swimming crabs can be farmed, but it is quite difficult.

2. The shape and shape characteristics of swimming crab

(1) The swimming crab is called "white crab" in some places. Its other names include three-spotted swimming crab, pistol crab, sea crab, sea crab, etc. It is an arthropod.

(2) The male swimming crab has a pointed and smooth navel, long claws, and a green shell surface. The female has a round and hairy navel and an ochre-colored 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) Swimming crabs are distributed in Japan, Korea, the Malay Archipelago, the Red Sea, and most coastal areas of mainland China.

2. Breeding methods and conditions of swimming crabs

1. Prepare the Pond

(1) Swimming crabs are suitable for growing in seawater. You need to prepare salty water with unpolluted water quality. When filling the tank, the water depth should not exceed 6 meters.

(2) You can put some small fish and shrimps into the water to provide natural food for swimming crabs.

(3) Swimming crabs like to bask in the sun on the shore. When building a pool, you can leave a portion of land area to satisfy their preference. You can spread a proper amount of sand on the land to satisfy the swimming crabs' habit of throwing sand.

2. Pond disinfection

(1) Before the seedlings are planted, drain the pond and remove all but a small amount of silt from the bottom.

(2) You can place some containers such as water bottles at the bottom of the pond to provide swimming crabs with more suitable adjustment space.

(3) After cleaning the pond, you can add an appropriate amount of water and fertilizer. After a few days, you can release the swimming crab seedlings.

3. Release crab seedlings

(1) Due to the crab's tendency to fight for food, when releasing crab seedlings, they should be fed separately according to their size.

(2) The temperature of the pool cannot be lower than 20°C and should not fluctuate too much. The water temperature must be strictly adjusted according to changes in air temperature.

4. Daily management

(1) In addition to adjusting the water temperature in a timely manner, the water in the pond needs to be replaced in a timely manner. In the hot summer, the water needs to be replaced twice a week.

(Lan Tan 2) When the climate is hot, the appetite of swimming crabs will decrease. You can feed them some small fish and shrimps that they like to maintain their nutritional needs.

(3) Pay attention to the oxygen content in the water pool. When there is too little oxygen, it may cause large-scale death of swimming crabs.

How can we improve the survival rate of swimming crab seedlings at the critical moment of swimming crab breeding?

During the critical breeding season of swimming crab parents, some farmers have recently found that the mortality rate of the purchased sea-caught swimming crab parents during pond cultivation is higher than in previous years. Based on many years of experience in seawater pond farming, the author recommends that farmers strengthen management in the following three aspects to improve the survival and marketability of the parents.

1. Strengthen training

In winter, pond-cultivated swimming crabs are selected as parents for intensive cultivation, which can not only ensure the quality of the parents, but also be unaffected by the market and sea conditions. A small shed is built as a cultivation pond. The bottom of the scattered sail pond should be covered with a layer of sand about 375px, and equipped with oxygenation equipment and heating equipment. After the parent crabs enter the pond, fresh bait is fed and the water is changed in time. When the water temperature drops to 10℃, the swimming crabs will hibernate in the sand. At this time, no feeding is done to reduce the amount of water change. After entering the spring, the heating and ripening time is determined according to production needs. The temperature is increased by 0.5℃ every day, and the temperature is raised to a constant temperature of 18℃, and the parent crabs are waiting for the eggs. The parent crab cultivation density is 3 to 5 per square meter, the water depth is 80 to 2500px, and a small amount of hail is charged. The bait is mainly fresh shellfish, wild fish and sandworms, and the daily feeding amount is 10% of the parent crab's body weight. Change the water once a day, and remove the residual bait, feces and dead crabs in time when changing the water.

2. Prevent injuries

When catching swimming crabs in the sea or in ponds, the movements should be light and fast, and the claws should be tied with thin rubber bands to prevent them from killing each other. For short-distance transportation, they can be covered with wet straw and placed in an insulated box for transportation. For long-distance transportation, live water trucks can be used for oxygenated transportation. If the temperature is high, ice cubes can be added to cool it down appropriately.

3. Pay attention to disease prevention

Before entering the pond, the pond must be thoroughly cleaned and disinfected, and the parent crabs should be bathed in medicine to kill parasites and bacterial pathogens on the body surface. Substances such as allicin and immune polysaccharides should be mixed into the bait to improve the body's disease resistance. During the breeding process, pond patrols should be strengthened to observe the activity in a timely manner. Once a disease is found, treatment measures should be taken immediately.

The above are some methods, and you can take some measures based on these methods.

1. Strengthening cultivation Selecting swimming crabs cultivated in ponds as parents for strengthening cultivation in winter can not only ensure the quality of the parents, but also be unaffected by the market and sea conditions. Build a small shed as a cultivation pond. The bottom of the pond should be covered with a layer of sand about 375px, and equipped with oxygenation equipment and heating equipment. After the parent crabs enter the pond, feed them with fresh bait and change the water in time. 2. Prevent injuries Whether catching swimming crabs in the sea or in the pond, the movements should be light and fast, and the claws should be tied with thin rubber bands to prevent mutual killing. For short-distance transportation, they can be covered with wet straw and wrapped in a heat preservation box for transportation.

Strengthening training

In winter, the swimming crabs are selected from ponds for intensive breeding, which can ensure the quality of the parents and will not be affected by the market and sea conditions. A small shed is built as a breeding pond. The bottom of the pond should be covered with a layer of sand of 375px, and equipped with oxygen and heating equipment. After the parent crabs enter the pond, they are fed with fresh bait and the water is changed in time. When the water temperature drops to 10℃, the swimming crabs will hibernate in the sand. At this time, no feeding is done to reduce the amount of water change.

As far as swimming crab farming is concerned, sand-bottom ponds are better than mud-bottom ponds. This is also true for temporary farming in autumn and winter. The survival rate of sand-bottom ponds is significantly higher than that of mud-bottom ponds. The reason is that the ammonia nitrogen and hydrogen sulfide content in the bottom of mud-bottom ponds is relatively high, and the environment is poor. For ponds with a large proportion of soft mud, it is best to clean the bottom of the pond before the start of farming every year, remove the surface silt, and carry out sand laying transformation. If the bottom has deteriorated, pay attention to reasonable feeding, avoid residual bait, and sprinkle 20g/m³ of quicklime on the whole pond every half month to improve water quality, or use microbial preparations for treatment.