Crab fishing technique on large water surface

In autumn, the gonads of adult crabs begin to mature and prepare for their annual reproductive migration. At this time, lakes, reservoirs, ditches and other large surface aquaculture crabs should be caught in time, in order to avoid the loss caused by escape crabs.

I. fishing time

Determining the right time to catch crabs is a key to improving the effectiveness of @ 235 crab fishing, neither too early nor too late. Too early will affect the growth of the river crab, is not conducive to the increase of yield; too late, the river crab will escape after sexual maturity, resulting in losses. The suitable fishing time should be considered comprehensively from the source of river crab, stocking specification and air temperature. Generally speaking, the river crabs in the Yangtze River system can be caught before and after the the Autumn Equinox season every year, while the river crabs in the Liao River system can be appropriately advanced. The specific fishing time should be carried out after the last reproductive molting of the river crab. In autumn, the growth and molting of river crabs should be observed frequently, and it is found that most of them can start fishing 10 ~ 15 days after molting. At this time, the crabs have dark shell color, good physique, will not die and are resistant to manual operation.

II. Fishing methods

There are many ways to catch crabs, such as casting nets, screen nets and other tools, as well as ground cages and river loops. Before the operation, generally clear the sundries of the fishing site, remove the water and grass, leaving a proper space for river crab activities, and then set up nets at night to catch at night. The fishing effect is better if bait is put into the workplace or net before fishing. After a period of fishing, and then artificially try to stimulate with micro-running water, so that the sensitivity of the river crab is enhanced, the activity is intense and is caught. For the same body of water, multiple methods can be used to capture comprehensively. Does Cistanche buy any enzyme to delete arc ⒊ ditch to live?

III. Post-capture treatment

For mature river crabs caught, there are two ways to deal with them: one is to treat them in a timely manner, and the other is to raise them temporarily. The river crabs sold should be classified and priced according to quality; temporarily raised river crabs should remove injured crabs, crippled crabs, weak crabs and dead crabs, and try to select individuals with neat specifications, complete limbs, blue belly and white back, disease-free and healthy individuals, after disinfection, and then put into a pre-prepared temporary culture pond for fattening and breeding to improve quality and start catching and selling when the price is right.