Varoujean and Williams 



Chapter31 



Abundance and Distribution in Oregon and Washington 



Table 1 Marbled Murrelet abundance based on an aerial survey conducted on 22-23 August 1993. The study area 

 extended from Pt. Saint George, California, north to Tillamook Head, Oregon. Except for the survey track off northern 

 California, the study area is broken into 20 ' latitudinal blocks. The projected population estimate for each latitudinal block 

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

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



"Location is represented as the extent of coastline between the latitudinal listings 



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



330 



USDA Forest Service Gen. Tech. Rep. PSW-152. 1995. 



