Activities of digestive enzymes in pseudozoea and postlarvae of mantis shrimp Oratosquilla oratoria
LIU Hai-ying 1,2， ZHOU Yuan-xue 1， XING Kun 1，CHEN Lei 1
1.Center for Marine Ranching Engineering Science Research of Liaoning,Dalian Ocean University, Dalian 116023, China;2.Key Laboratory of Marine Bio-resources Restoration and Habitat Reparation in Liaoning Province, Dalian Ocean University, Dalian 116023,China
Abstract: Activities of digestive enzymes were analyzed from pseudozoea Ⅲ to pseudozoea Ⅺ and postlarvae of mantis shrimp Oratosquilla oratoria during ontogenetic development by an enzyme method. The amylase activity was shown to be increased firstly, a peak at Ⅴ stage, then decreased in the subsequent larvae, while the cellulase activity was found to be decreased. There were significantly lower amylase and cellulase activities in postlarvae than in pseudozoea (P<0.05). The activities of pepsin, trypsase and lipase were found to be increased, significantly higher in postlarvae than those in pseudozoea (P<0.05) except that there was significant difference in lipase activity between the postlarvae and pseudozoea Ⅺ(P>0.05). The findings indicated that the activities of the digestive enzymes in the larval and postlarval mantis shrimp were involved in developmental stages, and influenced by diets and energy demand during different developmental stages.
2015, Vol. 30 
