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Journal Article

Populations and Habitat Use of Marine Birds in the Semidi Islands, Alaska

Scott A. Hatch and Martha A. Hatch
The Murrelet
Vol. 64, No. 2 (Summer, 1983), pp. 39-46
DOI: 10.2307/3534688
Stable URL: http://www.jstor.org/stable/3534688
Page Count: 8

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Topics: Bird nesting, Sea birds, Population estimates, Burrows, Breeding, Censuses, Aviculture, Cliffs, Gulfs, Boats
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Populations and Habitat Use of Marine Birds in the Semidi Islands, Alaska
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Abstract

About one-quarter of the resident seabirds in the Gulf of Alaska breed on the Semidi Islands. In terms of biomass, the proportion is closer to one-third. The most abundant birds are Common and Thick-billed Murres, with a combined population exceeding 1 million birds. Hundreds of thousands of Horned Puffins breed in burrows on two islands. Other species numbering more than 100,000 individuals include the Northern Fulmar, Fork-tailed and Leach's Storm-Petrels, and possibly also the Black-legged Kittiwake and Tufted Puffin. Both species of storm-petrels commonly nest in side chambers of puffin burrows. Parasitic Jaegers nest in a loose colony on Chowiet Island. This behavior has not been reported elsewhere in the Gulf of Alaska. Red-faced and Pelagic Cormorants commonly change breeding colony location from year to year. The Semidi Islands are the easternmost breeding site for Least Auklets.

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