The growth of different populations of swimming crab Portunus trituberculatus collected from stocking-enhancement,self reproduction and overwintering populations was studied in a same culture pond in 2014 and 2015by two-dimensional graph.The 2014 result showed that the different populations of the crab were distinguished obviously by total carapace width and body weight after 10 dand 20din the same culture pond.The self reproduction and overwintering populations were only distinguished by total carapace wid...