Figures 



1. Approximate world distribution of bowhead whales prior to commercial exploitation 4 



2. Locations where bowhead whales were harvested by Yankee whalers 5-7 



3. Comparison among years of estimated total number of bowhead whales migrating northwardly past Pt. Barrow, 

 Alaska, from 1 5 April to 30 May 8 



4. Comparison among years of observer effort expended from 15 April to 30 May 9 



5. Aerial survey tracklines and white whale observations in the northern Bering Sea, March 1976 9 



6. Aerial survey tracklines and bowhead observations in the Bering Sea, April 1976 10 



7. Aerial survey tracklines and white whale observations in the Bering Sea, April 1976 10 



8. Aerial survey tracklines and bowhead observations in the northern Bering and southern Chukchi Seas, March-April 

 1977 : 11 



9. Aerial survey tracklines and white whale observations in the northern Bering and southern Chukchi Seas, March-April 

 1977 11 



10. Aerial survey tracklines and bowhead observations in the eastern Chukchi and southern Beaufort Seas, April and May 

 1976 11 



11. Aerial survey tracklines and bowhead observations in the eastern Chukchi and western Beaufort Seas, May 1976 11 



12. Aerial survey tracklines and white whale observations in the eastern Chukchi and Beaufort Seas, April-May 1976 .... 12 



13. Aerial survey tracklines and white whale observations in the eastern Chukchi and western Beaufort Seas, May 1977 . . 12 



14. Aerial survey tracklines and white whale observations in the eastern Bering and southeastern Chukchi Seas, May 

 1977 12 



15. Aerial survey tracklines and white whale observations in the western Beaufort Sea, May 1977 13 



16. Aerial survey tracklines and bowhead observations in the eastern Chukchi and western Beaufort Seas, early June 

 1976 13 



17. Aerial survey tracklines and bowhead observations in the northern Bering and southern Chukchi Seas, June 1976 .... 13 



18. Aerial survey tracklines and bowhead observations in the eastern Chukchi and western Beaufort Seas, mid-June 

 1976 14 



19. Aerial survey tracklines and white whale observations in the eastern Chukchi and western Beaufort Seas, early June 

 1976 14 



20. Aerial survey tracklines and white whale observations in the northern Bering and southern Chukchi Seas, June 

 1976 14 



21. Aerial survey tracklines and white whale observations in the eastern Chukchi and western Beaufort Seas, mid-June 

 1976 14 



22. Aerial survey tracklines and bowhead observations in the northern Bering, eastern Chukchi, and western Beaufort 

 Seas, August 1976 15 



23. Aerial survey tracklines and white whale observations in the northern Bering, eastern Chukchi, and western Beaufort 

 Seas, August 1976 15 



24. Aerial survey tracklines and bowhead observations in the eastern Chukchi and western Beaufort Seas, September 

 1976 15 



25. Aerial survey tracklines and bowhead observations in the eastern Chukchi and western Beaufort Seas, August- 

 October 1977 16 



26. Aerial survey tracklines and white whale observations in the eastern Chukchi and western Beaufort Seas, September 

 1976 16 



27. Aerial survey tracklines and white whale observations in the eastern Chukchi and western Beaufort Seas, August- 

 October 1977 16 



28. Aerial survey tracklines in the northern Bering and southern Chukchi Seas, October 1975 16 



29. Bowhead whale sightings in the Bering and southern Chukchi Seas, 1974-79, from aerial and vessel surveys 17 



30. Bowhead whale sightings in the Beaufort Sea, August through November 1974-78 19 



31. Aerial survey tracklines flown by NMFS scientists, September 1974 20 



32. Sightings of white whales during aerial surveys conducted between the months of March and September 1975-77 27 



Tables 



1 . Summary of spring counts of bowhead whales during their annual spring migration through the flaw zone near Bar- 

 row, Alaska 8 



2. Summary of some estimated reproductive life history data for bowhead whales 21 



3. Area use and timetable for the majority of the bowhead whale population in or adjacent to proposed Outer Continen- 

 tal Shelf lease areas of the Bering, Chukchi, and Beaufort Seas 24 



4. Sightings of bowhead whales within and adjacent to the existing Beaufort Sea Outer Continental Shelf lease area be- 

 tween long. 150° and 145 °W within the 12 m depth contour 25 



