+ B9^o«f91 



+ <»5 



+ =14 



+ 92 



4107 +■" 



+ 100 

 +39 +106 +101 



*+41 +,05 +102 



+ 38 ++42 +,(,, 



33 +37 r^^.^-^ +103 



St . Lawrence I . 



+ 13 

 + 12 



+ 11 



-H-7 



};arginskya I . 



and Olyutorskiy Bay 



Hall I. 

 St. Matthew I. 



+ 5 +4 



+3 



+ 2 +1 



/ 



"b 



/ 



^O 



V. V. V 



A^ 



A^ 



^^ 



6- ^O 



Fig. I . Oceanographic stations/locations of zooplankton collections south of Benng Strait occupied by the Soviet research vessel Akademik Korolev. 

 Seaburd Transect LocotLons 



/^ 



■"o 



Fig. 2. Seabird transects surveyed south of Bering Strait during July-August 

 1988 from the Soviet research vessel Akademik Korolev. Crosses (+) 

 mark the heginnmg of each 10 min transect. 



Birds were surveyed in a 300-m-wide area extending 

 forward and abeam, to the side of the ship that afforded the 

 better visibility (Taskerfrw/.. 1984). Only observations made 

 when the ship was under way have been included in this report 

 (Table 1 ). Thirty-six "station counts" were also conducted 

 while the ship was occupying an oceanographic station. These 

 have been excluded from this analysis because seabirds are 

 known to be attracted to a ship when it is not moving and this 

 may bias the observations. At the beginning of each 10-min 

 count period, the date of transect, time, ship's position, speed, 

 ocean depth, and sea surface temperature were recorded. The 

 species, number, and general behavior (sitting or flying) of 

 birds seen during the count period were recorded subsequently. 

 At the end of the prescribed lO-min period, the .^OO-m survey 

 area was "collapsed" forward, the ship's position noted, and a 

 new transect was begun immediately. Counts were not 

 conducted during periods of fog or low light. All observations 

 were made by J. Andrew during this cruise. 



To assess how trophic status and foraging tactics relate to 

 seabirds' use of pelagic habitats, all birds were classified as 

 either planktivores or piscivores. based on principal prey 



390 



