Acknowledgments 128 



Literature cited 128 



Figures 



1 . Characteristics of the eastern Bering Sea 2-3 



2. Statistical subdivisions of the study area used for the 1975 eastern Bering Sea baseline survey 4 



3. Statistical subdivisions of the Bering Sea study area used for the 1976 spring trawl survey 5 



4. Bering Sea "otolith" areas used for collection of age data and other individual specimen data during the 1976 



spring trawl survey 6 



5. Location of successful trawling stations in the Bering Sea during April 1976 13 



6. Location of successful trawling stations in the Bering Sea during May 1976 13 



7. Location of successful trawling stations in the Bering Sea during June 1976 14 



8. Location of successful trawling stations in the Bering Sea during July 1976 14 



9. Location of successful trawling stations in the Bering Sea during August 1976 15 



10. Distribution of water temperatures observed in the Bering Sea during April 1976 16 



1 1 . Distribution of water temperatures observed in the Bering Sea during May 1976 17 



12. Distribution of water temperatures observed in the Bering Sea during June 1976 18 



13. Distribution and relative abundance of total fish and invertebrates during the 1976 Bering Sea spring trawl 



survey 19 



14. Distribution and relative abundance of total fish during the 1976 Bering Sea spring trawl survey 23 



15. Distribution and relative abundance of flatfish during the 1976 Bering Sea spring trawl survey 24 



16. Distribution and relative abundance of sculpins during the 1976 Bering Sea spring trawl survey 25 



17. Distribution and relative abundance of eelpouts during the 1976 Bering Sea spring trawl survey 26 



18. Distribution and relative abundance of skates during the 1976 Bering Sea spring trawl survey 27 



19. Distribution of catch rates of poachers during the 1976 Bering Sea spring trawl survey 28 



20. Distribution and relative abundance of total invertebrates during the 1976 Bering Sea spring trawl survey .... 29 



21 . Distribution and relative abundance of snails during the 1976 Bering Sea spring trawl survey 30 



22. Recurrent species groups observed in the Bering Sea during the 1976 spring trawl survey and their relationships . 34 



23. Occurrences of recurrent group 1 35 



24. Occurrences of recurrent group 2 36 



25. Occurrences of recurrent group 3 37 



26. Occurrences of recurrent group 4 38 



27. Occurrences of recurrent group 5 39 



28. Distribution and relative abundance of walleye pollock during the 1976 Bering Sea spring trawl survey 40 



29. Size composition of walleye pollock taken during the 1976 Bering Sea spring trawl survey 42-43 



30. Relative age composition of walleye pollock taken during the 1976 Bering Sea spring trawl survey 44 



31. Length-weight observations from walleye pollock taken during the 1976 Bering Sea spring trawl survey 46 



32. Von Bertalanffy growth curves for male and female walleye pollock, 1976 Bering Sea spring trawl survey 47 



33. Von Bertalanffy growth curves for walleye pollock taken during the 1976 Bering Sea spring trawl survey, by sex 



and otolith area 48 



34. Length-maturity relationships observed from walleye pollock taken during the 1976 Bering Sea spring trawl 



survey 49 



35. Reproductive condition of walleye pollock taken during the 1976 Bering Sea spring trawl survey 50 



36. Distribution and relative abundance of yellowfin sole during the 1976 Bering Sea spring trawl survey, April and 



May 51 



37. Distribution and relative abundance of yellowfin sole during the 1976 Bering Sea spring trawl survey, June and 

 July-August 52 



38. Size composition of yellowfin sole taken during the 1976 Bering Sea spring trawl survey 54 



39. Relative age composition of yellowfin sole taken during the 1976 Bering Sea spring trawl survey 56 



40. Length-weight observations from yellowfin sole taken during the 1976 Bering Sea spring trawl survey 58 



41. Von Bertalanffy growth curves for yellowfin sole taken during the 1976 Bering Sea spring trawl survey 59 



42. Distribution and relative abundance of rock sole during the 1976 Bering Sea spring trawl survey 60 



43. Size composition of rock sole taken during the 1976 Bering Sea spring trawl survey 63 



44. Relative age composition of rock sole taken during the 1976 Bering Sea spring trawl survey 64 



45. Length-weight observations from rock sole taken during the 1976 Bering Sea spring trawl survey 65 



46. Von Bertalanffy growth curves for male and female rock sole, 1976 Bering Sea spring trawl survey 66 



47. Von Bertalanffy growth curves for rock sole taken during the 1976 Bering Sea spring trawl survey, by sex and 



otolith area 67 



48. Distribution and relative abundance of flathead sole during the 1976 Bering Sea spring trawl 



survey 68 



49. Size composition of flathead sole taken during the 1976 Bering Sea spring trawl survey 69 



50. Relative age composition of flathead sole taken during the 1976 Bering Sea spring trawl survey 72 



IV 



