publication . Article . 2009

Distribution and diet of Ivory gulls (Pagophila eburnea) in the North Water polynya

Karnovsky, N. J.; Hobson, K. A.; Brown, Z. W.; George Hunt;
Open Access English
  • Published: 01 Mar 2009
  • Publisher: eScholarship, University of California
  • Country: United States
Abstract
Ivory gulls (Pagophila eburnea, Phipps, 1774), one of the world's least-known species, have declined throughout their range in recent years. This study describes the patterns of ivory gull use of the North Water polynya, a large polynya that occurs every year near ivory gull breeding sites on Ellesmere Island, Nunavut, Canada. We conducted at-sea surveys from Canadian icebreakers during the summers of 1997-99. In 1998, stomach contents of five ivory gulls were analyzed. We measured stable isotope ratios (δ13C, δ15N) of liver, muscle, feather and bone to determine how ivory gull diets vary during the year. We observed a total of 275 individuals, most of which wer...
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publication . Article . 2009

Distribution and diet of Ivory gulls (Pagophila eburnea) in the North Water polynya

Karnovsky, N. J.; Hobson, K. A.; Brown, Z. W.; George Hunt;