Fouling, surface bacteria and antibacterial agents of four bryozoan species found in Tasmania, Australia

Extracts from four species of bryozoans, found in Tasmanian coastal waters, have been demonstrated to exhibit selective antibacterial activity. The four species showed gradations in fouling by encrusting organisms and differential surface bacterial numbers. The two chemically defended species Amathi...

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Bibliographic Details
Published in:Journal of experimental marine biology and ecology 1993-01, Vol.169 (1), p.1-13
Main Authors: Walls, J.T., Ritz, D.A., Blackman, A.J.
Format: Article
Language:English
Subjects:
Alkaloid
Amathia wilsoni
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Antibacterial
Autoecology
Biological and medical sciences
Bryozoans
Chemical defense
Fouling
Fundamental and applied biological sciences. Psychology
Marine
Protozoa. Invertebrata
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Summary:Extracts from four species of bryozoans, found in Tasmanian coastal waters, have been demonstrated to exhibit selective antibacterial activity. The four species showed gradations in fouling by encrusting organisms and differential surface bacterial numbers. The two chemically defended species Amathia wilsoni and Orthoscuticella ventricosa had the most active antibacterial extracts and the lowest levels of fouling. In contrast, extracts of Cellaria pilosa and Bugularia dissimilis, which have no known secondary metabolites, had weak antibacterial properties, and colonies showed large numbers of encrusting fouling organisms. Counts of bacteria over the surfaces of the four species revealed that O. ventricosa had the lowest numbers; B. dissimilis and C. pilosa had higher numbers while A. wilsoni had the highest counts, but the most patchy distribution.
ISSN:0022-0981
1879-1697
DOI:10.1016/0022-0981(93)90039-Q