Glaucous gulls (Larus hyperboreus) are major predators in the Arctic and may benefit from human development.
We studied use of garbage by glaucous gulls in Barrow, Alaska, in 2007, when municipal waste was disposed of in a landfill,
and in 2008, when it was incinerated. In both years, diet samples from breeding adult gulls contained less garbage than those
from loafing nonbreeding gulls (mostly subadults of less than four years), possibly because the breeding colony was more
distant than many loafing sites from the landfills. Although breeding gull samples showed no change, garbage in regurgitated
pellets and food remains of nonbreeding gulls was significantly less prevalent in 2008 than in 2007 (28% vs. 43% occurrence
in diet samples), and this reduction could be explained by the switch from landfill to waste incineration. Yet garbage remained
a substantial part of nonbreeding gull diet after the management change. Other aspects of waste management, such as storage
prior to disposal, may also be important in limiting scavengers’ access to garbage and thus reducing the indirect impact of
human development on prey species of conservation concern.
