Holliday, D. V. Tracor Aerospace, holliday@galileo.tracor.com
Greenlaw, C. V. Tracor Aerospace, greenlaw@galileo.tracor.com
McGehee, D. E. Tracor Aerospace, dmcgehee@galileo.tracor.com

 
ACOUSTICAL MONITORING OF THE DYNAMICS OF THIN LAYERS AND AGGREGATIONS OF PLANKTON AND FISH
 
During June 1998, three six-frequency, Tracor Acoustic Profiling Systems (TAPS-6) were deployed in an upward looking mode on mid-water moorings in East Sound at Orcas Is., WA. Each TAPS-6, located at the corners of a 300 m triangular array, collected data from 12.5 cm intervals in the upper 10 m every minute. This acoustical monitoring of thin scattering layers and aggregations revealed a complex, dynamic distribution of zooplankton and fish. This contribution will focus on our interpretation of data collected during a single day of the 9 week deployment. Data from an eight frequency TAPS-8, used in a cast mode from a research vessel anchored nearby, and ancillary data on the local physical environment will be discussed to set the context for the observed biological distributions. The work was supported by ONR Code 322BC.
 
Day: Tuesday, Feb. 2
Time: 10:30 - 10:45am
Location: Hilton of Santa Fe
 
Code: SS05TU1030H