| EK60 Water Column Sonar Data Collected During DY1303 |
| Gulf of Alaska Acoustic-Trawl Survey of Walleye Pollock (DY1303, EK60). The Midwater
Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries
Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted acoustic-trawl (AT)
stock assessment surveys in the Gulf of Alaska (GOA) during the late winter/early
spring of 2013 to estimate the distribution and abundance of walleye pollock (Gadus
chalcogrammus). The vessel departed Kodiak, Alaska on 14 March arriving at the start
of the first survey on 15 March. The Marmot Bay survey was conducted 15-16 March,
Shelikof Strait 16-25 March, and Gulf of Alaska shelf break east of Chirikof Island
25-27 March. The vessel arrived in Kodiak 28 March following a post-cruise EK60 calibration
on 27 March in Three Saints Bay, Kodiak Island, Alaska. The survey was conducted aboard
NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic
instrumentation. |
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