EMA-2: Eastern Bering Sea - West southwestern Bering Shelf Latitude:   57.5000     Longitude:  -170.5000 Associated Investigators: Lisa Eisner , Jeffrey Napp ,   Ed Farley   Related Web Sites: [EMA page]   [BASIS page]   Related Time Series: [ BASIS/EMA 1 - southeastern Bering Shelf ]   [ BASIS/EMA 2 - southwestern Bering Shelf ]   [ BASIS/EMA 3 - central Bering Shelf ]   [ BASIS/EMA 4 - Chukchi Sea ]   The goal of the Bering-Aleutian Salmon International Survey (BASIS), now called the Ecosystem Monitoring and Assessment Program (EMA), is to improve and reduce uncertainty in stock assessment models of commercially important fish species through the collection of observations of fish and oceanography. Observations for fish include abundance, size, distribution, diet and energetic status. Oceanographic observations include conductivity-temperature at depth, nutrient levels, and estimates of the composition and biomass of phytoplankton and zooplankton (includes jellyfish) species. These fish and oceanographic observations are used to connect climate change and variability in large marine ecosystems to early marine survival of commercially important fish species in the Gulf of Alaska, Bering Sea, and Arctic.