Warmer ocean temperatures disrupted prey species distribution and hundreds of thousands of seabirds, mostly Common Murres, died of starvation. AKA Common Guillemot. Researchers at OSU are working to better understand changes among common murre and bald eagle populations along the Oregon coast. Approximately 62,000 dead or dying murres washed ashore from 2015-2016, andcommon murres were the most impacted equating to around 10-20% of the total common murre population on the Pacific Coast. Like all auks, murres come to land only to breed.

In addition, murre eggs were becoming increasingly scarce. Common Murre. Population trends for the common murre (Uria aalge californica) were determined from available whole-colony counts of murres in California, Oregon, Washington, and British Columbia from 1800 to 1995.From 1800 to 1978, historical counts were sporadic and not standardized.

world population of roughly 12-15 million breeding birds; much reduced from estimates of historical figures Thick billed murre. Diet.

Butler aims from the deck of his boat. The Egg Rock colony was estimated to have 3,000 birds in the early 1980’s; however, disaster struck with the 1986 Apex Houston oil spill. Previous analyses using either mito-chondrial DNA (mtDNA) (Moum et al.

Common murres actively breed in colonies at Egg Rock, which is visible from Devil’s Slide Trail. In winter Common Murres are found at sea, south of the ice edge, and on little islands in the Pacific. Since 2007 there has been a slight decline in the overall common murre population size, while the bald eagle population has increased more than tenfold.

The term murre refers to 2 species, common murre (Uria aalge) and thick-billed murre (U. lomvia), the largest extant members of the auk family, though smaller than the recently extinct great auk.Murres weigh 800-1100 g and are up to 46 cm long. world population estimate 14 million breeding birds; Northwest Atlantic populations have declined since 1950s; Greenlandic numbers have reduced by more than 50%, and some colonies extirpated 1991; Moum & Plumage is dark brown to black above, mostly pure white below. Tail is short. Therefore, common murre populations from the Atlantic and Pacific may form natural replicates to test mechanisms of population differentiation.

As climate change worsens, our oceans could … They are not on the 2014 State of the Birds Watch List.

Common murre. 2.

Population census of the common murre AZA population by origin (left) and sex (right) from 1975 to 2013.