Key points of winter management of river crabs cultured in ponds

2015 is a relatively warm winter, the daytime temperature is basically maintained above 10 degrees, the warm winter is relatively special for the river crab, and the living habits of the river crab are greatly affected by the temperature, mainly because the river crab begins to feed at a temperature of 10 degrees Celsius. In the case of warm winter, the activity and feeding of river crabs are obviously enhanced. Overwintering is a foundation, how to make river crabs survive the winter healthily and smoothly. It will directly affect our aquaculture benefit in 2015. This article will communicate with you on the key points of winter management of river crab ponds.

First, release seedlings: after the crab seedlings are transported to the pond, the differences in water quality and density between the seedling ponds and the adult crab ponds will lead to the inadaptability of river crabs, such as landing. When releasing the seedlings, use a set of 10,000 seedlings with "Anti-irritating Ling" and "Golden Polysaccharide". It can quickly replenish the physique of river crabs and reduce stress landing.

Second, feed high-protein feed or small fish every 5-7 days to ensure the physique of river crabs.

Third, fat water and river crab feeding can be divided into active feeding and passive feeding. Feeding belongs to the bait that provides active feeding for river crabs. River crabs have a habit of absorbing water. A large number of algae and zooplankton will be inadvertently ingested by river crabs. We call it passive feeding, crab active feeding we call active feeding, it is the existence of this passive feeding, through the use of "Fei Shuiwang" + "golden liquid" to quickly fertilize and water. At the same time, Feishuiwang is rich in amino acids, small peptides and other nutrients that can be directly absorbed by river crabs, which can quickly and directly supplement the physique of river crabs.

4. Disinfection: problems such as claw tip wear are unavoidable in the process of transportation of river crabs. After a week of seedling release, crab seedlings are disinfected with super iodine 2 mu * m / bottle after proper feeding physique recovery. to prevent the occurrence of bacterial diseases such as rotten claws leading to molting failure in the later stage.

Fifth, regular detoxification: some ponds using pyrethroids, such as enemy killing, killing insects, etc., should pay attention to regular detoxification even after releasing seedlings, because pyrethroids are easy to settle into the soil in low temperature periods, while crabs live at the bottom of the pond, especially in winter, many crabs like to hide in the sand. It is prone to chronic poisoning, so it is recommended to use jieduling twice every 7 days before and after "four detoxification". The active carbon in jieduling can absorb pyrethroid drug residues quickly and persistently, provide an excellent environment for the growth of river crabs and reduce the molting failure caused by chronic poisoning during the first molting of river crabs.