BACTERIAL ISOLATES FROM HEALTHY STAGHORN CORALS ACROPORA MILLEPORA (EHRENBERG, 1834) & ACROPORA ASPERA (DANA, 1845)

A.D.N Rupidara

Abstract


The cross-streak method was employed to determine the potential biocontrol properties of bacterial isolates from healthy corals. t was used to test cross with bacteria that were isolated from the diseased coral of A. millepora species and also A. aspera species. Of the nine isolates of the healthy A. millepora(Ehrenberg, 1834) four (SUM C, SUM F, SUM G and SUM H) showed antagonistic effect over the remaining isolates. These together with the eight isolates of A. aspera (SUA A, SUA E, SUA H, SUA J, SUA L, SUA O, SUA T and SUA V) were tested for their biocontrol potential. Only two of the four isolates from healthy A. millepora inhibited the growth of bacterial isolates from the diseased A. millepora , one (SUM F) inhibiting 100% and one ( SUM C) 85%. On the other hand, for the isolates of A. aspera, SUA V inhibited 50% of the diseased isolates while SUA J performed poorly and was inhibited by all the isolates from the diseased A. aspera. Generally, bacterial isolates from healthy corals can be a potential biocontrol.

Keywords: biocontrol potential, coral associated bacteria, mucus, healthy coral, diseased coral.

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