Fig 4.

Body mass of common murres collected: (a) at seven breeding colonies in the Gulf of Alaska (GOA), May-September 1988–1999; (b) after a large die-off of murres on the Kenai Peninsula, GOA, February-March 1993; (c) at scattered locations in the GOA and Bering Sea, May 2015-April 2016; (d) along the central coast of California (37°-42° N), May 2015-April 2016; and, (e) along the southern coast of California (32°-37° N), March 2015-April 2016. The vertical dashed line represents the approximate critical mass below which mortality is expected in starved common murres (phase III starvation). The vertical dotted line indicates the cutoff mass below which birds were likely young-of-the-year fledglings.