Burger 



Chapter 29 



Marine Distribution, Abundance, Habitats in British Columbia 



14 



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Barkley Sound, Ucluelet to Broken Group 



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Broken Group Islands 



10 

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Trevor Channel - Deer Island surveys 



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Figure 8 Densities of Marbled Murrelets in Barkley Sound, plotted in weekly intervals through the breeding season. 

 One survey was made per week, except where indicated by numbers above the columns. The asterisk indicates a 

 survey with no murrelets seen. Note that the units of density are not the same in all studies. Data from Hatler and others 

 (1978) and Burger (1994). 



a general pattern of low densities at sea in summer off the 

 east coast (appendix 1). 



On a finer scale, Burger ( 1 994) examined murrelet densities 

 in 19 segments of coast between Pachena Bay and Port San 

 Juan off southwestern Vancouver Island. This 65-km stretch 

 of coast has one of the highest known densities of murrelets in 

 British Columbia (appendix 1) and is relatively straight and 



unbroken, and hence more easily censused than along the 

 highly indented coastline found in most of British Columbia. 

 Adjacent to this area are some of the largest tracts of old- 

 growth forest remaining on southern Vancouver Island, 

 specifically the Nitinat-Tsusiat-Klanawa and Carmanah- 

 Walbran watersheds. The highest at-sea densities in both 1991 

 and 1993 were consistently found in four segments immediately 



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



305 



