| EK60 Water Column Sonar Data Collected During DY0903 |
| Acoustic-Trawl Survey of Walleye Pollock in the Southeastern Aleutian Basin near Bogoslof
Island (DY0903, EK60). The Midwater Assessment and Conservation Engineering (MACE)
program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science
Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Bogoslof
Island area of the southeastern Aleutian Basin during late winter of 2009 to estimate
the distribution and abundance of walleye pollock (Theragra chalcogramma). The survey
was conducted 7-13 March, departing from Dutch Harbor, Alaska on 7 March and arriving
in Kodiak, Alaska 15 March. A calibration of the Simrad EK60 echosounder system (the
primary survey instrument) was conducted on 7 March. The survey was conducted aboard
NOAA Ship Oscar Dyson, a 64 meter fisheries research stern trawler equipped with acoustic
and oceanographic instrumentation. |
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