Individual molting and growth characters of Eriocheir sinensis reared in “Crab Palace” system
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Received:June 15, 2018  Revised:December 06, 2018
DOI:10.12024/jsou.20180602342
Key Words: Chinese mitten crab  individual cultivation  growth  body color  condition factor  hormone
Author NameAffiliationE-mail
LI Zhihua Key Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China 
 
LU Deyin Key Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China 
 
LIU Zhaoqiang Key Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China 
 
YANG He Key Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China 
 
WANG Jun Key Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China 
 
WANG Chenghui Key Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China 
wangch@shou.edu.cn 
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Abstract:
      The molting and growth characters of Chinese mitten crab (Eriocheir sinensis) reared in the "Crab Palace" system for one molting cycle were studied. The results showed that the average increment rate of body weight of the crab was 33.19%, the average increment rate of carapace length, width and height ranged from 12.12% to 14.97%, and the average molting interval was 59.35 d. The average condition factor before molting was 60.84%, and the mean RGB value of body color in back carapace was 109.17, and the content of ecdysone hormone (EH) reached 14.18 IU/mL. In the "Crab Palace" system, no significant correlation (P>0.05) was observed between the growth status, EH content, molting interval before molting and increment rate of the growth traits after molting (P>0.05). The Chinese mitten crab reared in the "Crab Palace" system would start molting when its condition factor reached 60%, and ecdysone hormone content was more than 14 IU/mL.