Concentrations of Irgarol in selected marinas of Oahu, Hawaii and effects on settlement of coral larval.

Abstract

This study examined concentrations of Irgarol 1051(®) in selected marinas on the island of Oahu, Hawaii and used laboratory bioassays to assess effects of Irgarol on coral larval settlement. Field surveys of small boat marinas performed in 2006-2007 revealed low concentrations of Irgarol 1051(®), an antifouling paint additive, ranging from non-detected (<17 ng/l) to 283 ng/l. The highest concentrations of Irgarol 1051(®) were found in marinas with low flushing rates and a high density of moored boats and boat traffic. The potential effect of Irgarol 1051(®) on coral larval settlement was evaluated in the laboratory using planulae from Porites hawaiiensis, a zooxanthellate shade-dwelling coral found in Hawaiian waters. Exposure to Irgarol 1051(®) at 100 ng/l resulted in a statistically significant reduction in settlement of coral larvae. This was within the range of Irgarol 1051(®) concentrations found in some of the marinas surveyed on the island of Oahu but Irgarol was not detected in seawater samples at offshore reefs.

• Authors: Sean Knutson, Craig A Downs, Robert H Richmond
• Journal: Ecotoxicology (London, England) (Ecotoxicology) Vol. 21 Issue 1 Pg. 1-8 (Jan 2012) ISSN: 1573-3017 [Electronic] United States
• PMID: 21833544 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Triazines
• Water Pollutants, Chemical
• irgarol 1051

Topics

• Animals
• Anthozoa (drug effects)
• Biological Assay (methods)
• Environmental Monitoring (methods)
• Geologic Sediments (analysis)
• Hawaii
• Larva (drug effects)
• Seawater (analysis)
• Triazines (analysis, toxicity)
• Water Pollutants, Chemical (analysis, toxicity)