| ME70 Water Column Sonar Data Collected During DY0904 |
| Acoustic-Trawl Surveys of Walleye Pollock in the Central Gulf of Alaska (DY0904, ME70).
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 central Gulf of Alaska (GOA) during
the late winter/early spring of 2009 to estimate the distribution and abundance of
walleye pollock (Theragra chalcogramma). The vessel departed Kodiak, Alaska on 19
March and conducted a survey along the central Gulf of Alaska shelf east of Chirikof
Island 20-22 March. The vessel then surveyed Shelikof Strait 23-28 March and performed
an acoustic equipment calibration on 29 March. The Marmot Bay survey was conducted
29-30 March followed by fisheries research equipment testing on 31 March. The vessel
ended the cruise in Kodiak, Alaska on 1 April. The survey was conducted aboard NOAA
Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic
instrumentation. |
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