30 USGS/BRD/ITR-2000-0012 



marine birds on the Canadian west coast. Canadian 

 Wildlife Service, Delta, British Columbia. 73 pp. 



Vermeer, K., S. G. Sealy, and G. A. Sanger. 1987. Feeding 

 ecology of Alcidae in the eastern North Pacific 

 Ocean. Pages 89-227 in J. P. Croxall, editor. 

 Seabirds: feeding ecology and role in marine 

 ecosystems. Cambridge University Press, 

 Cambridge, England. 



Verspoor, E., T. R. Birkhead, and D. N. Nettleship. 1987. 

 Incubation and brooding shift duration in the 

 common murre. Canadian Journal of Zoology 

 65:247-252. 



Wahl, T.R. 1975. Seabirds in Washington's offshore zone. 

 Western Birds 6: 11 7-1 34. 



Wahl, T. R., S. M. Speich, D. A. Manuwal, K. T. Hirsch, 

 and C. Miller. 1981. Marine bird populations of 

 the Strait of Juan de Fuca, Strait of Georgia, and 

 adjacent waters in 1978 and 1979. U.S. Department 

 of Commerce, NOAA, Interagency Energy- 

 Environment Research and Development Program 

 Report EPA-600/7-81-156, Seattle, Washington. 

 391 pp. 



Wahl, T. R., K. H. Morgan, and K. Vermeer. 1993. Seabird 

 distribution off British Columbia and Washington. 

 Pages 39^7 in K. Vermeer, K. T. Briggs, K. H. 

 Morgan, and D. Siegel-Causey, editors. The status, 

 ecology, and conservation of marine birds of the 

 North Pacific. Canadian Wildlife Service Special 

 Publication, Ottawa, Ontario. 



Wanless, S., and M. P. Harris. 1985. Two cases of 

 guillemots Uria aalge helping to rear neighbours' 

 chicks on the Isle of May. Seabird 8:5-8. 



Wanless, S., and M. P. Harris. 1988. The importance of 

 relative laying date on breeding success of the 

 guillemot Uria aalge. Ornis Scandinavica 19:205- 

 211. 



Wehrlin, J. 1977. Verhaltensanpassungen junger 

 trottellummen (Uria aalge aalge Pont.) ans 

 felsklippen- und koloniebruten. Zeitschrift fur 

 Tierpsychologie 44:45-79. 



Wiens, J.A.,and J. M. Scott. 1975. Model estimation of 

 energy flow in Oregon coastal seabird populations. 

 Condor 77:439-452. 



Wilson, U. W. 1991 . Response of three seabird species 

 to El Nino events and other warm water episodes 

 on the Washington coast, 1979-1990. Condor 

 93:853-858. 



Woodby, D. A. 1984. The April distribution of murres 

 and prey patches in the southeastern Bering Sea. 

 Limnology and Oceanography 29:181-188. 



Ydenberg, R. C. 1989. Growth-mortality trade-offs and 

 the evolution of juvenile life histories in the 

 Alcidae. Ecology 70:1494-1507. 



Zador, S. G., and J. F. Piatt. 1999. Time-budgets of 

 common murres at a declining and increasing 

 colony in Alaska. Condor 101:149-152. 



Additional References 



Briggs, K. T, W. B. Tyler, D. B. Lewis, and K. F. Dettman. 

 1983. Seabirds of central and northern California, 

 1980-1983: status, abundance and distribution. 

 Unpublished report, Center for Marine Studies, 

 University of California, Santa Cruz, California. 



Briggs, K. T., D. H. Varoujean, W. W. Williams, R. G. 

 Ford, M. L. Bonnell, and J. L. Casey. 1992. Seabirds 

 of the Oregon and Washington OCS 1989-1990. 

 Pages 1-162 in J. Bruggeman, editor. Oregon and 

 Washington marine mammal and seabird surveys. 

 Unpublished report, Ebasco Environmental, 

 Bellevue, Washington; and Ecological Consulting, 

 Inc., Portland, Oregon. 



Carter, H. R. 1996. Central California seabird die-off: 

 numbers of dead birds on sample beaches between 

 Sonoma and San Mateo counties on 12-19 July 

 1995. Unpublished report. National Biological 

 Service, California Science Center, Dixon, 

 California. 



Carter, H. R., G. J. McChesney, D. L. Jaques, C. S. Strong, 

 M. W. Parker, J. E. Takekawa, D. L. Jory, and D. L. 

 Whitworth. 1992. Breeding populations of seabirds 

 in California, 1989-1991. Volumes 1 and 2. 

 Unpublished draft report, U.S. Fish and Wildlife 

 Service, Northern Prairie Wildlife Research Center, 

 Dixon, California. 



Climo, L. 1993. The status of cliff-nesting seabirds at 

 St. Paul Island, Alaska in 1992. Unpublished report, 

 U.S. Fish and Wildlife Service, AMNWR 93/15, 

 Homer, Alaska. 



DeGange, A. R., and A. L. Sowls. 1981. Observations on 

 the seasonal use of coastal California by seabirds. 

 Unpublished report, U.S. Fish and Wildlife Service, 

 Office of Biological Services, Washington, D.C. 



Dragoo, B. K., and K. Sundseth. 1993. The status of 

 northern fulmars, kittiwakes, and murres at St. 

 George Island, Alaska, in 1992. Unpublished report, 



