RESPONSES OF SHRIMP PENAEUS-INDICUS POST LARVAE TO LUMINOUS BACTERIA VIBRIO-HARVEYI

Advanced post larvae;of Penaeus indicus challenged with Vibrio harveyi inoculum levels of 10(3), 10(4) and 10(5) CFU.ml(-1) for 96 h did not show luminescence or other clinical signs of luminous vibriosis. Thou gh the exposed larvae were normal, accepted feed, and were active till the termination of experiment, the isolation of bacteria from haemoly mph suggests their opportunistic pathogenicity: It appears that virule nce of the strains, and susceptibility of hosts are Important factors leading to mortality of prawn larvae in hatcheries.