The effects of clove oil on coral An experimental evaluation using Pocillopora damicornis (Linnaeus)
- Elsevier Science Bv
- Publication Type:
- Journal article
- Frisch, A., Ulstrup, K., and Hobbs, J. 2003 'The effects of clove oil on coral An experimental evaluation using Pocillopora damicornis (Linnaeus)', Journal Of Experimental Marine Biology And Ecology, vol. 345, no. 2, pp. 242-248.
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Clove oil solution (10% clove oil, 90% ethanol) is an anaesthetic that is widely used to catch demersal fish on coral reefs. This study assessed the effects of clove oil solution on colonies of Pocillopora damicornis, a cosmopolitan reef coral. In the laboratory, low concentrations (0.5 ppt) of clove oil solution had no effect on coral colour or photosynthetic efficiency, irrespective of exposure time (1-60 min). Corals treated with high concentrations (50 ppt) of clove oil solution died immediately, including those that were exposed briefly 91 min). Intermediate concentrations 95 ppt) of clove oil solution produiced variable results: a 1 min exposure had no effect, a 10 min exposure caused bleaching and reduced photosynthetic efficiency, and a 60 min exposure caused total mortality. To validate these observations, clove oil solution was applied to corals in situ. Sixty-three days after application, corals treated with 10 ml of clove oil solution appeared to be unaffected. It wwas concluded that 91) limited amounts of clove oil solution are unlikely to harm this coral, and (2) clove oil solution may represent an 'eco-friendly' alternative to cyanide for use in the live reef-fish trade.
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