Varoujean and Williams 



Chapter 31 



Abundance and Distribution in Oregon and Washington 



Table 3 Marbled Murrelet population estimates based on an aerial survey conducted on the Washington coast of the 

 western Strait of Juan de Fuca on 6 September 1993. The projected population estimate for each longitudinal block is the 

 density estimate (derived from the number of observed murrelets divided by the actual area surveyed) times the study area 

 in each block, assuming a study area width of 1,000 m 



* Location is represented as the extent of coastline between longitudinal listings 



+ AD = Adults in alternate plumage; BW = Black/White plumage, which includes adults in basic plumage and hatch-year birds. 



Table 4 Marbled Murrelet population estimates based on an aerial survey conducted on the British Columbia coast of the 

 western Strait of Juan de Fuca on 6 September 1993. The projected population estimate for each longitudinal block is the 

 density estimate (derived from the number of observed murrelets divided by the actual area surveyed) times the study area 

 in each block, assuming a study area width of 1,000 m 



* Location is represented as the extent of coastline between longitudinal listings 



+ AD = Adults in alternate plumage; BW = Black/White plumage, which includes adults in basic plumage and hatch-year birds. 



332 



USDA Forest Service Gen. Tech. Rep. PS W- 152. 1995. 



