Cetacean line-transect survey conducted in the eastern Bering Sea shelf by Alaska Fisheries Science Center, National Marine Mammal Laboratory from Miller Freeman from 1999-07-07 to 2004-06-30 (NCEI Accession 0131862)

Visual surveys for cetaceans were conducted on the eastern Bering Sea shelf along transect lines, in association with the AFSC’s echo integration trawl surveys for walleye pollock. Surveys in 2000 and 2004 were from early June to early July, the survey in 2002 was from early June to late July, and the survey in 1999 was from early July to early August. Searches for cetaceans were conducted from the flying bridge of the NOAA ship Miller Freeman at a platform height of 12 m above the sea surface and survey speed of 18.5 22.0 km/h (10 12 kts). North south transect lines were spaced 37 km apart and defined by the historical acoustic survey for walleye pollock. Insufficient funding precluded including cetacean observers on all legs except in 2002. See Friday et al. 2012. Cetacean distribution and abundance in relation to oceanographic domains on the eastern Bering Sea shelf: 1999-2004 (http://www.sciencedirect.com/science/article/pii/S0967064512000100).

针对鲸类（cetaceans）的目视调查沿断面测线在白令海东部陆架开展，配套阿拉斯加渔业科学中心（Alaska Fisheries Science Center, AFSC）针对阿拉斯加狭鳕（walleye pollock）的回声积分拖网调查。2000年与2004年的调查时段为6月初至7月初，2002年调查时段为6月初至7月末，1999年调查时段为7月初至8月初。鲸类目视观测由美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）的“米勒·弗里曼”号科考船的飞桥实施，观测平台距海面高度为12米，调查航速为18.5~22.0 km/h（10~12节）。南北向断面测线间距为37公里，由历史开展的阿拉斯加狭鳕声学调查划定。因经费不足，除2002年航次外，其余航次均未配备鲸类观察员。详见Friday等（2012）发表的《白令海东部陆架鲸类分布与丰度及其与海洋学区域的关联：1999-2004年》（http://www.sciencedirect.com/science/article/pii/S0967064512000100）。