1. Free-hand capture method: Around October every year, river crabs will go ashore in large numbers to find migration channels, so they can be captured directly by hand. 2. Tool catching method: In September-October every year, tools such as floor cages, Hetao and crab cages can be used for catching. 3. Light trapping method: Because the river crab has phototaxis, to catch a small amount of river crab, you can set an electric light in the corner of the pond mouth and use the light to trap it.

1. Capture skills of wild river crabs

1. Free-hand capture method

(1) When raising crabs in ponds, the water area is relatively small, and the density of crabs is high. Generally, around October every year, river crabs will start to reproduce and migrate in large numbers to find migration channels, and then they can be captured directly.

(2) You must be careful when catching. You can use your index finger and thumb to fasten the two sides of the crab's back shell, so that its pincers can't be used. This is safe and won't hurt the crab.

(3) When catching, you must wear gloves on your hands, so that the effect will be better. When catching, you must not grasp the crab directly enough to reach the big claws, otherwise the crab will cut itself off and cause the crab to be disabled.

2. Tool catching method

(1) Generally, in September-October every year, tools such as floor cages, Hetao and crab cages can be used for catching, and there must be inverted whiskers at the entrance of the catching tools, so that the river crabs can get in but not out.

(2) When catching, these tools must be placed in the places where river crabs often move and on the migration routes, so that the activity routes of river crabs can be blocked.

(3) You can set up a catching tool in the evening of the first day and catch it in the early morning of the next day.

(4) When the water temperature is suitable, because the river crabs are still feeding, bait can be put in the tool to lure the river crabs in, which will be more effective.

3, light trapping method

(1) Because the river crabs have certain phototaxis, when catching a small number of river crabs, electric lights can be set at the mouth of the pond, so that the light can be used to trap them.

(2) Several small pits can be dug under the lamp, and iron drums or mesh cloth can be put in the pits, so that the river crab will go into the pit by mistake when climbing to the light. At this time, the iron drum or mesh cloth can be caught.

second, what's the difference between wild river crabs and cultured river crabs

1. Different shapes

(1) Wild river crabs: their bellies are not only white but also shiny, with little mud in their bodies, strong legs and feet, and hard joints.

(2) cultured river crabs: the cracks in the belly and the joints of legs and feet are black, and the joints are soft.

2. Different shells

(1) Wild river crabs: Wild river crabs mainly live in the ocean, and they have many opportunities to be washed away by seawater, so they can wash away the dust on their bodies, so their shells are not as black as those of cultured river crabs.

(2) Culturing river crabs: Because there are few opportunities for cultured river crabs to be washed away by seawater, the soil on their bodies will be hard to be washed away, and the soil will stink, turn black and yellow after a long time, resulting in a dark shell.

3. Different tastes

(1) Wild river crabs: the meat is very delicate and the taste is fresh and sweet.

(2) cultured river crabs: the meat is very sticky and the taste is not very fresh and sweet.

4. Different wildness

(1) Wild river crabs: Because wild river crabs need to go out for food by themselves, they are very wild.

(2) Culturing river crabs: Because cultured river crabs have fixed food every day, they don't need to go out for food by themselves, so their wildness is relatively poor.

5. The pliers are different in size

(1) Wild river crabs: The pliers of wild river crabs are a little bigger than those of cultured river crabs.

(2) Culturing river crabs: The pliers for cultivating river crabs are a little smaller than those for wild river crabs.