Effects of starvation on digestive enzyme activities and some immune indexes in broodstock red swamp crawfish Procambarus clarkii
ZHAO Chao-yang, ZHOU Xin, BING Xu-wen, WANG Gui-qin
1. Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Seienees,Wuxi 214081 ,China;2. Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China; 3. College of Animal Science and Technology, Jilin Agricultural University, Changehun 130118, China
Abstract: The digestive enzyme activities in hepatopancreas and immune indexes in muscle were measured in red swamp broodstock crawfish Procambarus clarkia starved for 0,4,8,12 and 16 days. The results showed that the trypsin, lipase and amylase activities were found to decrease gradually as the starvation periods increased, significandy lower trypsin and amylase activities 4 days after starvation, and significant lower lipase activity 8 days after starvation. No significant changes in the digestive enzyme activities were observed from the 8th day to 16th days after starvation. There were significant differences in some immune indexes in muscle of the broodstock crawfish during the starvation. The activities of superoxide dismutase and catalase were found to increase slightly within 0 -4 days of the starvation, but to start to decrease sharply 8 clays after the starvation. Acid phosphatase showed low activity significantly at 8 day starvation, whereas the lysozyme activity decreased by fifty percent at the 12th day of starvation.
2010, Vol. 25 
