CONTAMINATION AND IMPACTS OF NEW ANTIFOULING BIOCIDE IRGAROL-1051 ON SUBTROPICAL CORAL REEF WATERS

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SHEIKH M.A.; HIGUCH T.; FUJIMURA H.; IMO T.S.; MIYAGI T.; OOMORI T.

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Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST) Year:2009 | Volume:6 | Issue:3 (23) Page(s): 353-358

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Title

CONTAMINATION AND IMPACTS OF NEW ANTIFOULING BIOCIDE IRGAROL-1051 ON SUBTROPICAL CORAL REEF WATERS

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Keywords

CALCIFICATION

PHOTOSYNTHESIS

POLLUTION

PS II COMPOUNDS

Abstract

Coral reefs are deteriorating worldwide due to various stresses, including POLLUTION of hazardous chemicals such as antifouling chemicals. Occurrence and impacts of a new antifouling biocide Irgarol-1051 (2-methylthio- 4-tert- butylamino -6-cyclopropylamino -s-triazine) have been studied in coral reef waters around Okinawa Islands, Japan. The average concentration of Irgarol detected at commercial and fisheries Ports was 24.70±9.88ng/L. In Naha Bay, the average concentration of Irgarol was 10.00±12.98ng/L. The average level detected around the Ports has already approaches the environmental risk limit for the marine organisms. Irgarol was detected in waters at the frequency of 92.3 % (24/26) of the total samples collected during two sampling campaigns (September and December, 2007) at the Ports. In Naha Bay, Irgarol was detected by 40.5 % (17/42) of the total water samples collected monthly from Sep., 2007 to Feb., 2008, indicating that Irgarol is widely detected along the coastal shorelines of Okinawa Island. The ecotoxicological study revealed that the rate of PHOTOSYNTHESIS in the coral Galaxea fascicularis was significantly reduced by 18 % and 121 % relative to control when the corals were exposed to 1000 and 10,000ng/L of Irgarol, respectively. The CALCIFICATION rate dropped by 98.3 % relative to control when the corals were exposed to 10,000ng/L of Irgarol. The results of the present study report the wide occurrence of new antifouling biocide Irgarol around coastal areas of Okinawa Island. However, the contamination does not pose serious threat on the PHOTOSYNTHESIS and CALCIFICATION of corals under short term exposure (96 h).

Cites

A STUDY ON CONTAMINANT MIGRATION OF SUGARCANE EFFLUENT THROUGH POROUS SOIL MEDIUM

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APA: Copy

SHEIKH, M.A., HIGUCH, T., FUJIMURA, H., MIYAGI, T., OOMORI, T., & IMO, T.S.. (2009). CONTAMINATION AND IMPACTS OF NEW ANTIFOULING BIOCIDE IRGAROL-1051 ON SUBTROPICAL CORAL REEF WATERS. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), 6(3 (23)), 353-358. SID. https://sid.ir/paper/285171/en

Vancouver: Copy

SHEIKH M.A., HIGUCH T., FUJIMURA H., MIYAGI T., OOMORI T., IMO T.S.. CONTAMINATION AND IMPACTS OF NEW ANTIFOULING BIOCIDE IRGAROL-1051 ON SUBTROPICAL CORAL REEF WATERS. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST)[Internet]. 2009;6(3 (23)):353-358. Available from: https://sid.ir/paper/285171/en

IEEE: Copy

M.A. SHEIKH, T. HIGUCH, H. FUJIMURA, T. MIYAGI, T. OOMORI, and T.S. IMO, “CONTAMINATION AND IMPACTS OF NEW ANTIFOULING BIOCIDE IRGAROL-1051 ON SUBTROPICAL CORAL REEF WATERS,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), vol. 6, no. 3 (23), pp. 353–358, 2009, [Online]. Available: https://sid.ir/paper/285171/en

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