DRAIN 



Figure 10-1. Diagram of Flow-through Oil Dosing System. 

 NOTE: See text for details. 



different postures and movements) the times for alert (first observable response 

 to food), wait (period between alert and leaving shelter to search), and search 

 (time after first leaving shelter until food touched with maxiUipeds) were 

 recorded. On the morning of the 6th day, #2 fuel oil was introduced at a 

 predetermined flow rate. Lobster behavior was recorded 6 hours later and 

 subsequently twice daily, as above. After five days, oil introduction was 

 stopped. All recordings were continued as before for another five days to 

 determine behavioral and chemical recovery rates. 



Oil Chemistry 



Concentrations of total hydrocarbons in the water column were determined 

 by infrared spectroscopy before, during, and after introduction of oil. On the 

 day before oil was added, a 2-1 water sample from every tank was extracted 

 with 50 ml CCI4. A second extraction was performed 12 hours and a third 24 

 hours after onset of oil mixing. Extractions were continued daily for the 

 remaining four days of oil exposure, and on the first and second day 

 post-exposure to determine how quickly oil left our system. A small number of 

 CH2CI2 extractions were performed for gas chromatographic analysis. The oil 

 used in the study was an Exxon #2, provided by the EPA Environmental 

 Research Laboratory, Narragansett, Rhode Island. 



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