Since the 1920s, Great Black-Backed Gulls have increased in frequency in the Gulf of Maine, raising concerns over possible effects on Common Eider populations from over-predation.

In order to assess whether predation rates on ducklings by Great Black-Backed Gulls are affected by human disturbances, particularly researcher created disturbance, we observed a Common Eider nursery from a vantage point that nullified observer effects.

Download PDF

Type of Work:


Work Completed For: