Abstract:

Several experiments had been conducted to study the growing performance between the new strain of Erocheir sinensis named ‘Chang Jiang 1’ and common crab under the conditions of same culture environment, same feeding management, same stocking density. The results showed that the average size and the survival rate were not significant difference between ‘Chang Jiang 1’ and common crab at age 1, the proportion of precocious puberty of ‘Chang Jiang 1’ than common crab was reduced by 5%. The growth was faster for ‘Chang Jiang 1’ than that for common crab at age 2. The average weight increased by 21.64% and there was extremely significant difference (P<0.01), yield an average improvement of 21.22%. The daily growth rate of F5 was improved 22.73% over that of control line and the variation coefficient of body weight was reduced 19.14%. Continuous production of the second anniversary of the comparative test results showed that the ‘Chang Jiang 1’ grew fast, neat group size, breeding survival rate was high, increased yield, welcomed by the majority of farmers, markets and industrial applications prospects.The growth was faster for “Chang Jiang 1 ” than that for common crab at age 2.The average weight increased by 21.64% and there was extremely significant difference ( P < 0.01 ), yield an average improvement of 21.22%. The daily growth rate of F5 was improved 22．73％ over that of control line and the variation coefficient of body weight was reduced 19.14％ ．Continuous production of the second anniversary of the comparative test results show that the " Chang Jiang 1 " grow fast, neat group size, breeding survival rate is high, increase yield, welcomed by the majority of farmers, markets and industrial applications prospects.