The so-called lazy crab refers to long-term dwellings in caves, sand, and crevices that are far from the surface of the water. Lazy crab is a waste product in crab farming and has no economic value. In the process of crab breeding, the more lazy crabs, the lower the yield and the less chance of successful breeding. Years of aquaculture experience tells us that as long as we can manage according to the scientific management methods of aquaculture, we will be able to “have a hard time and prevent crabs from lazyâ€, and the possibility of successful breeding is still relatively large. 1. Because of the lack of breeding experience or plans, some people simply put large-eyed larvae directly into the crab breeding ponds for breeding. The big-eyed larvae become the stage I, II, and III crabs. Both swimming ability and predation ability are very weak. Most large-eyed larvae have to gather on the shore for a long time, especially in the case of storms. The growth process of individual crabs is accomplished through periodic clam shells. The crabs themselves do not have the ability to synthesize chitin, and must be taken from outside foods. Insufficient intake of mincini cannot achieve normal molting growth. Due to objective factors such as poor management, some crabs that directly entered the pool, some crabs that could not eat palatability food, had to dig holes in the shore and take humus in the nearby soil to maintain their lives, but they could not complete the physiological activities of the growth of the molting. Over time, it changed the normal habits of crabs and became lazy crabs. Crab seedlings must be raised temporarily before being placed in aquaculture ponds. There are many methods of holding the cages, and it is better to use cages for raising, and it is also possible to use earthen ponds, concrete pools and other water bodies. If there is no good holding pool, a small net of water can be used to hold the fish in the corner of the breeding pond. During the holding period, it is necessary to keep the water quality fresh and rich in dissolved oxygen, and to manually arrange some attachments in the water body. Feeding is mainly animal feed, supplemented by plant feeds. Feeding should be even, so that all the crabs eat enough food. The large-eyed larvae were raised to stage III larval crabs and then placed in crab ponds for breeding. 2. If the condition of the pond is better, if the sediment quality of the crab pool is not even, especially the gap between the sediments or sand and stones near the surface of the water is relatively large, the crab is easy to use the gap to hide and dig holes. In the northern region, there are many windy winds in spring, and waves, evaporation and leakage caused by the wind will be eroded into a section with a length of 10 to 20 centimeters and a slope ratio of almost zero on the shore. The river crabs cave in this section. It is easy to become lazy crab. Therefore, the slope ratio of the pond surface is preferably 1:2.5 to 1:3. The bottom quality should be flat and seamless, and the pond's water retention performance should be better. 3. Feeding should be uniform and sufficient. The early feeding work after young crabs enter the pool is very important. Feeding should follow four principles, especially during these two peak feeding periods: In May, the second was that before the oyster shells were raised in the later period, the crabs had larger food intake and they had to invest in the bait. 4. Transplanting aquatic weeds and attachments For ponds with few waterless grasses or aquatic weeds, some plants or emergent plants can be planted by artificial transplantation. The area of ​​aquatic weeds accounts for about 1/3 of the area of ​​pooled water. It is also possible to artificially arrange some nets or dry branches as attachments. This will not only create a good habitat for crabs, but also provide shelter for crabs and clams, and provide a variety of foods, water purification, shade and temperature reduction, etc. effect. 5. To maintain the water level stability, crabs often choose to dig holes in the slope between the high and low water levels. The crabs should be added to the required water level at a time after being raised into a crab pool. The water level should be maintained later. stable. If it is necessary to change the water or add water later in the breeding process, it must be added to the original water level. This is very important. 6. Maintaining good water quality The crabs like to dwell in waters with clean water, rich dissolved oxygen and lush aquatic plants. Therefore, besides not using polluted water sources and replacing deteriorating water, crab pond water should be refilled regularly with fresh water. Until the crabs come out of the pond, we must always keep the pond fresh, live, tender, and cool, and regularly disinfect the water. If necessary, we must also provide an aerator. 7. After the discovery of the lazy crab, remedial measures should be taken to carefully feed and feed the bait added with chitin. If necessary, lazy crabs can be concentrated and fed and placed in bodies of water. Body Temperature Scanner,Temperature Detector Gate,Non-Contact Temperature Measurement,Infrared Temperature Equipment Shenzhen Sunson Tech Co., Ltd , https://www.sunsonkiosk.com