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Reversible effect of potassium sorbate on Balanus amphitrite larvae. Potential use as antifoulant
Authors:Guillermo Blustein  Mónica García  Mirta Stupak  Claudio Cerruti
Affiliation:1. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas) , CICPBA-CONICET, La Plata , Argentina;2. Facultad de Ciencias Naturales y Museo , Universidad Nacional de La Plata , La Plata , Argentina;3. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas) , CICPBA-CONICET, La Plata , Argentina;4. Facultad de Ciencias Exactas , Universidad Nacional de La Plata , La Plata , Argentina
Abstract:Marine biofouling constitutes a major worldwide technical and economic problem. International regulations concerning the protection of both the environment and industrial workers have prompted paint manufacturers and end users to look for suitable replacements for traditional antifouling (AF) pigments. For this reason, the potential AF activity of potassium sorbate (KS) on nauplii and cyprids of Balanus amphitrite was tested in laboratory and field trials. Larval bioassays demonstrated a marked inhibitory and reversible effect. The values obtained for EC50 and LC50 were 9.91 mM and 36.73 mM, respectively, and the therapeutic ratio was 3.71, indicating that KS acts via a non-toxic mechanism. After 60 days in the sea, a varnish coating incorporating KS showed a substantial decrease in micro- and macrofouling density and diversity. This investigation indicated that KS is a promising AF agent for replacing the traditional toxic compounds.
Keywords:potassium sorbate  antifouling  reversible effect  Balanus amphitrite larvae
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