Cytotoxic and anti-microbial activity of the sponge Iotrochota sp. as a function of size and spatial competitors

Luter, Heidi M., Duckworth, Alan R., and Syms, Craig (2007) Cytotoxic and anti-microbial activity of the sponge Iotrochota sp. as a function of size and spatial competitors. Marine Biology Research, 3 (5). pp. 312-318.

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Secondary metabolites from marine invertebrates, such as sponges, have diverse ecological roles and may be used in anti-predation, anti-fouling and spatial competition. The thin encrusting sponge Iotrochota sp., found on the Great Barrier Reef, Australia, contains several novel indoles that may aid in spatial competition. To examine whether levels of surrounding competition affect the toxicity of Iotrochota sp., 24 sponges from Salamander Reef, Central Great Barrier Reef, subject to either high or low levels of surrounding competition, were sampled. Tissue samples were taken from areas where the sponge was in direct competition with neighbouring sessile invertebrates, as well as from areas where competition was less obvious. Compounds from the tissue samples were extracted and tested in both cytotoxicity and anti-microbial assays. However, neither cytotoxicity nor anti-microbial activity varied significantly between the high and low competition treatments. Cytotoxicity was greatest among large sponges, suggesting that size is an important factor contributing to the toxicity of Iotrochota sp. sponges in this study.

Item ID: 2906
Item Type: Article (Research - C1)
ISSN: 1745-1019
Keywords: Cytotoxicity; size; spatial competition; sponge
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Date Deposited: 24 Sep 2009 05:32
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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