CATDOLL : CATDOLL: What are the important things to pay attention to when raising crabs?

What are the important things to pay attention to when raising crabs?

The early stage of river crab farming is from the release of seedlings to the beginning of June when high temperatures arrive. During this period, the water temperature is low, the water quality is good, less bait is thrown in, the crabs eat less, and there are relatively few diseases. During this period, it is necessary to scientifically select and purchase seedlings with good physique and no damage. New ponds should be de-alkalied and water plants transplanted. When the high temperature period is about to begin, the crab pond should be filled with water in time. If the water quality of the external river is not good, immediately use external medicine to adjust the water quality after adding enough water; if the water quality of the pond is not good, first drain two-thirds of the old pond water, use 1 to 2 external medicines to purify and improve the water quality, and then introduce water from the external river with good water quality. Drugs include Biowater water quality regulator, Sukang B type and Fibroworm Bike, etc.

The middle period of river crab farming is from early June to mid-August. The temperature is high, which is the peak period for various diseases of river crabs. Oral and external medications should be used once every 10 to 15 days. Do not wait until the disease occurs before using the medication. External medications are mainly used to improve the bottom quality and water environment. Bio-long-acting bacteria and toxins, Sukang B-type, Fibroworm B, chlorine dioxide, bromine chlorine, etc. can be selected; internal medications are used to enhance the physical fitness and immunity of river crabs. Bio-crab additives, Zhisha Wang, Kexueling, gill disease and other drugs can be selected. For large lakes with enclosure farming, preventive measures should be taken during the flood season. Use old mesh as a "bridge", one end of which leads to the bottom of the pond and the other end floats near the water surface. The middle section of the mesh is tilted at about 45 degrees. Feed artificial bait on the middle section of the mesh to guide the river crabs into the upper water body. Hang the slow-release long-acting bacteria and toxins tablets on the bottom of the pond to keep a good environment at the bottom of the pond. Use a high-pressure water gun to spray the upper layer of water or medicated water into the middle and lower layers of the water body to reduce the temperature difference between the upper and lower layers of water, allowing river crabs to quickly adapt to the new environment.

The late stage of river crab farming is from mid-August to the harvest period, which is the period of nutrition accumulation and mature migration of river crabs. Most mature river crabs in this stage crawl on the shore at night and rest in the water during the day. If you feed less or not at all during the day, you should feed more at night, because mature river crabs only crawl on the shore at night and cannot eat bait during the day, which will cause malnutrition of river crabs. Coupled with the large amount of physical exhaustion, river crabs will gradually die. If you find mature river crabs on the shore, especially early-maturing crabs, you should feed more during the day and less or no at night. Combined with some oral and topical drugs, you should hurry up to rejuvenate and catch them for the market. Fully mature river crabs, especially female crabs, have decreased liver function at this time. The time of feeding animal high-protein bait for intensive cultivation should not exceed 20 days. Otherwise, on the one hand, the river crabs will die because the liver function cannot adapt to the high-protein nutrient storage; on the other hand, the mature male crabs will force pseudo-mating with female crabs in fresh water, which will also cause death. When yellow crabs become blue crabs, they should be fattened, and the fattening time should not exceed 20 days. After that, the bait should be mainly sprouted wheat or sweet potatoes, pumpkins and other varieties with high sugar content, and it is not advisable to feed high-protein bait.

What should I pay attention to when raising crabs?

Hehe, I know, but crabs that are not easy to raise need to adapt to temperatures that are neither too high nor too low, about 30 degrees. It's ok if you raise it in a pond, but if you raise it at home, you can == it will fly away on its own. I raised a pot of crabs at home before, and they ran all over the floor. Later, I don't know how they died.