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Effect of extracts of marine algae on the anti-settlement activities against diatoms and spores of macroalgae

Lookup NU author(s): Dr Claire Hellio

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Abstract

The ban on the use of TBT-based antifouling paints for boats under 25 m in length has lead to a search for new non-toxic antifoulants. One of the most promising alternative technologies to heavy metal based antifouling paint is the development of antifouling coatings whose active ingredients are naturally occurring compounds from marine organisms. This is based on the principle that marine organisms also face the problem of the presence of epibionts on their own surfaces. In this study, the antifouling activity of a series of aqueous, ethanolic and dichloromethane extracts from thirty algae from the North East Atlantic coast was investigated. The extracts were tested in laboratory assays against species representative of two major groups of fouling organisms, viz . macroalgae and microalgae. The activity of several extracts was comparable to that of heavy metals and biocides (such as TBTO and CuSO 4 ) currently used in antifouling paints and their lack of toxicity with respect to the larvae of oysters and sea urchins suggests a potential for novel active ingredients.

Publication metadata

Author(s): Hellio C; Berge JP; Le Gal Y; Bourgougnon N

Publication type: Article

Publication status: Published

Journal: Biofouling

Year: 2002

Volume: 18

Issue: 3

Pages: 205-215

Print publication date: 09/09/2010

ISSN (print): 0892-7014

ISSN (electronic): 1029-2454

Publisher: Taylor & Francis Ltd.

URL: http://dx.doi.org/10.1080/08927010290010137

DOI: 10.1080/08927010290010137

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