| Title: | Daphnia behavioural responses to taste and odour compounds: ecological significance and application as an inline treatment plant monitoring tool |
| Author(s): | Watson SB; Juttner F; Koster O; |
| Address: | "Environment Canada, Canadian Centre for Inland Waters, Burlington, ON, Canada. sue.watson@ec.gc.ca" |
| ISSN/ISBN: | 0273-1223 (Print) 0273-1223 (Linking) |
| Abstract: | "Continuous monitoring of volatile organic compounds (VOC) in raw water is highly desirable for taste and odour management, but in most treatment plants this capacity is lacking. We used a bbe Daphnia toximeter installed in the Zurich water treatment plant to determine if Daphnia magna could be used to monitor odour compounds in source-water. Trace levels of two widely distributed biogenic VOCs in freshwater: P-cyclocitral and 2(E),4(E),7(Z)-decatrienal were added to the raw water inflow to chambers containing test animals and their behaviour was recorded using a high resolution camera. We observed that each compound elicited a marked short-term increase in Daphnia swimming velocity, but the effect was brief and an acclimation to the compounds was observed after a time period or with repeated additions. The results demonstrate that the toximeter has considerable potential as a tool to monitor certain VOCs in water, and that Daphnia perceive and react to 2(E),4(E),7(Z)-decatrienal and P-cyclocitral at concentrations between 2.5 and 25 microM" |
| Keywords: | "Aldehydes/analysis Alkenes/analysis Animals Behavior, Animal/drug effects Chemistry/methods Daphnia/*drug effects Diterpenes/analysis Environmental Monitoring/instrumentation/*methods Equipment Design Odorants/*analysis Water/*analysis Water Pollutants, C;" |
| Notes: | "MedlineWatson, S B Juttner, F Koster, O eng England 2007/05/11 Water Sci Technol. 2007; 55(5):23-31. doi: 10.2166/wst.2007.158" |
