[obol] BNA on fulmar morphs

[Mike Patterson]

I checked out the color morph distributions for pacific fulmars and
"borrowed" the chart identified as appendix 1.  Note that the majority
of fulmars (about 94%) come from three locations one of which has no
dark morphs, one 85% dark morphs and one 99% dark morphs.

The prevailing wisdom is that we get mostly southern populations
visiting us in the winter and the more northerly populations stay
in the gulf of Alaska.  A shift in light to dark proportions should
be an indicator that something is up in other parts of the winter
range.  

Region Colony              Location             Population   Percent
                                                estimate     dark morph 
British Columbia 
   Triangle I.             50°52’N, 129°05’W     4           75 
Alaska 
   St. Matthew; Hall Is.   60°30’N, 172°45’W     450,000     0 
   Lone Rk; Chiswell I.    59°35’N, 149°38’W     40          “most” 
   E. Amatuli I; Barren Is.58°55’N, 152°00’W     120         ~85 
   Pribilof Is.            57°00’N, 170°00’W     79,700      0.2 
   Semidi Is.              56°05’N, 156°45’W     440,000     85 
   Castle Rk, Shumagin Is. 55°17’N, 159°30’W     20          100 
   Bird I. Shumagin Is.    54°48’N, 159°47’W     20          100 
   Petrel I.               54°45’N, 133°31’W     150         >90 
   Cape Izigan Is.         53°14’N, 167°39’W     6           80 
   Ogchul I.               52°59’N, 168°24’W     4           75 
   Chagulak I.             52°34’N, 171°09’W     500,000     99 
   Amukta I.               52°30’N, 171°14’W     3,000       99 
   Buldir I.               52°21’N, 175°56’W     1,240       >99 
   Davidof I.              51°58’N, 179°40’E     20          100 
   Bobrof I.               51°55’N, 177°27’E     180         100 
   Gareloi I.              51°48’N, 178°47’W     5,920       “great 
                                                             majority” 

Subtotal: British Columbia & Alaska 17 colonies  1,480,424 

-- 
Mike Patterson               
Astoria, OR                    
celata at pacifier.com  
 
Technology and the modern birder
http://www.surfbirds.com/blogs/mbalame/archives/2007/09/technology.html