Method of temporarily keeping river crab for sale

Abstract

The method of temporarily keeping river crab for sale includes four parts, including selecting temporarily keeping pond, selecting river crab to be kept, determining temporarily keeping density and managing. It features the selection of temporarily keeping pond near water source with convenient water pouring and draining ports, area of 3-5 unit of area and water depth of 1.5-1.8 m; selecting robust river crab and sterilizing with 4 wt% concentration salt solution for 10-15 min; the temporarily keeping density of 2000-2500 / mou or 200-250 kg / unit of area and temporarily keeping period of 1-3 months; and managing including laying bait of 3-5 wt% of crab weight once a day, changing water of 15-25 cm once every 5-7 days, spraying lime once every 20-30 days, spraying 0.5 ppm concentration trichloroiso cyanuric acid concentration to sterilize water regularly, and feeding terramycin and furazolidone mixed into feed for continuous 5 days every half one month.

Description

technical field

[0001] The invention relates to a method for temporarily raising river crabs for sale. Background technique

[0002] Temporary cultivation of river crabs means that sexually mature river crabs are harvested and fattened for a short period of time for sale. However, if the management is not proper during the temporary raising process, it is easy to cause a large number of temporarily raised crabs to die. There are several reasons for this:

[0003] 1. It is physical death. After the gonads of river crabs are mature, they carry out reproductive migration for the reproduction of offspring. If they continue to be kept in fresh water for a while, they will cause physiological disorders, and the osmotic pressure in the body will be too high and they will die (swelling). Therefore, during the temporary raising of river crabs, over-mature yellow crabs should be removed.

[0004] 2. The quality of river crabs is poor. The specifications of the temporarily raised ...