Victor Marco Emmanuel N. Ferriols, Marciel G. Siladan, Allan N. Failaman and Rex Ferdinand M. Traifalgar
Bacteria from the gastrointestinal tract of the rabbitfish Siganus guttatus (Bloch, 1787) were isolated and screened for their potential as anti-vibrio agents. A total of four isolates based on colony dominance and morphology were selected and tested against Vibrio harveyi in cross-streak and co-culture tests. Although no inhibition was observed for all isolates in the cross-streak tests, a significant reduction was observed in the population of V. harveyi in coculture with all isolates. Reduction in V. harveyi population ranging from 63.9% - 100% were observed within 24 hours of inoculation. This study showed the potential of bacteria isolated from the gut of S. guttatus to act as a possible control agents against V. harveyi especially in cultures of shrimps and prawns wherein S. guttatus could be raised in tandem to produce “green water”.
