| Abstract: | 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. |
