Seasonal variation of antifouling activities of marine algae from the Brittany coast (France).
The antifouling activity of extracts (aqueous, ethanol, and dichloromethane) of 9 marine macroalgae against bacteria, fungi, diatoms, macroalgal spores, mussel phenoloxidase activity, and barnacle cypris larvae has been investigated in relation to season in bimonthly samples from the Bay of Concarneau (France). Of the extracts tested, 48.2% were active against at least one of the fouling organisms, and of these extracts, 31.2% were seasonally active with a peak of activity in summer corresponding to maximal values for water temperature, light intensity, and fouling pressure, and 17% were active throughout the year. This seasonal activity may be adaptive as it coincides with maximal fouling pressure in the Bay of Concarneau. Dichloromethane extracts of Rhodophyceae were the most active in the antifouling assays.
Hellio
Claire
C
School of Marine Science & Technology, Ridley Building, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK. c.g.a.hellio@ncl.ac.uk
Marechal
Jean-Philippe
JP
Véron
Benoît
B
Bremer
Graham
G
Clare
Anthony S
AS
Le Gal
Yves
Y
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D000935:Antifungal Agents / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects / Q000254:growth & development; D018441:Biofilms / Q000187:drug effects; D001685:Biological Factors / Q000737:chemistry / Q000494:pharmacology*; D049872:Bivalvia / Q000201:enzymology; D019327:Copper Sulfate / Q000494:pharmacology; D017377:Diatoms / Q000187:drug effects / Q000254:growth & development; D056890:Eukaryota / Q000737:chemistry*; D005602:France; D007814:Larva / Q000187:drug effects / Q000502:physiology; D014442:Monophenol Monooxygenase / Q000037:antagonists & inhibitors; D012621:Seasons; D012623:Seawater; D001468:Thoracica / Q000502:physiology; D014220:Trialkyltin Compounds / Q000494:pharmacology
D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D001685:Biological Factors; D014220:Trialkyltin Compounds; C011559:tributyltin; D014442:Monophenol Monooxygenase; D019327:Copper Sulfate