Aerial surveys of endangered whales in the Beaufort Sea, fall 1990
U.S. Dept. of the Interior, Minerals Management Service, Alaska OCS Region, 1991 - Nature
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Figure Number Title Page 1 Fall 1990 Study Area Showing Survey Blocks
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20 October 9 Sep Aerial Surveys aircraft Alaska OCS Region Alaskan Beaufort Sea Barter lsland bearded seals Beaufort Sea belukha belukha whales bowhead migration bowhead sightings Bowhead Whales Observed bowheads were observed Chukchi Seas clinometer CM CM CM CSJ CSJ Deadhorse depths at bowhead Diapir diving Endangered Species Act endangered whales estimated density gray whales half of October half of September Hr BH WPUE hr of survey ice cover ice coverage km/hr Ljungblad longitude Mann-Whitney marine mammals observed median depth median water depth Naval Polar Oceanography NMFS o o o o o o OCS Study MMS percent pinnipeds Polar Oceanography Center random-transect legs ringed seals Semimonthly Summary September and October SL SSL speed Table SSDC study area survey block survey effort Swim direction Swimming speed Table B-1 tail-slapping transect line Treacy Tukey Test USDOD USDOl Whale Behaviors whales were observed Z.SL