| Acoustic-Trawl Survey of Walleye Pollock in the Gulf of Alaska (MF0309, EK500). 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 Gulf of Alaska during late spring/early summer
of 2003 to estimate the distribution and abundance of walleye pollock (Theragra chalcogramma).
The survey was conducted along the Gulf of Alaska (GOA) shelf and shelfbreak from
the Shumagin Islands to Prince William Sound, 4 June to 16 July 2003, aboard NOAA
Ship Miller Freeman, a 66 meter stern trawler equipped with acoustic and oceanographic
instrumentation. The vessel departed Kodiak, Alaska on 4 June and arrived in Kodiak
on 16 July. The echosounder system was calibrated at the start of the cruise in Three
Saints Bay, Kodiak Island, Alaska on 5 June, and at the end of the cruise in Ugak
Bay, Kodiak Island, Alaska, 16 July 2003. |