미국
ES60 Water Column Sonar Data Collected During EBS12VA
The 2012 Eastern Bering Sea Upper Continental Slope survey was designed to sample the entire upper slope region from 200-1200 meters using a stratified random design. The goal was to distribute sampling effort in proportion to the survey area by depth and subarea. The survey area was divided into 6 physical subareas running south to north (1-6, Figure 1) that may represent distinct biological realms such as canyon areas (2, 4), steep rough slope areas (3,5) and broad gentle sloping areas (1, 6). Each subarea was further divided into five depth strata each covering approximately 200 meters in depth from 200-1200 meters. Table 2 shows the five depth strata, target depth ranges for each stratum, and the area and percentage each depth stratum represented.