工厂化育苗养殖体系内细菌数量动态变化研究

以异养菌、弧菌、副溶血弧菌为监测对象，对中国对虾的工厂化育苗进行实时监测，探寻育苗过程中细菌的动态变化规律，为对虾健康养殖提供科学依据。

Study on the Quantity Dynamic Changes of Heterobacteria and Vibrios in Larvae Industrialized Culture System

Objective] The dynamic change of heterebacteria and vibrios in larvae industrialized culture system was studied to provide scientific reference for healthy cultivation of shrimp. Method] The hcterobacteria, vibrios and pathogenic vibrio parahaemolyticus were monitored in larvae industrialized cul-ture system. Result] The heterobacteria, vibrios and pathogenic vibrio parahaemolyticus were the most in fertilized eggs of shrimp but the least in naupli-us, then their number would increase with growth. During whole rearing period, both heterobscteria in larvae, vibrios in water would increase by one order of magnitude, while both vibrios in larvae and heterobacteria in water would increase by two orders of magnitude. There were many heterohacteria and vibri-os but few vibrio parahaemolyticus in living bait. The correlation coeffcients between larvae and heterobacteria and vibrios in water were 0.704 and 0.840 in culture system respectively, while the correlation among heterobacteria, vibrios in living bait and larvae, water were weak or negative. Conclusion] There was a dynamic relation between water and larvae in rearing period, and restrictly control of culture condition would restrain the occurrence of disceae caused by vibrio parahaemolyticus, besides that bacteria number in bait was not obviously correlated with bacteria nubmer in culture system.