Seabirds between Alaska and Hawaii

Abstract
Seabirds were observed between Alaska and Hawaii along 158.degree.W longitude from Oct. 24 to Nov. 6, 1976. Their distribution and abundance dances corresponded remarkably well to oceanographic regions. Indices of seabird density dropped in a series of plateaus from 44 birds/km2 in the Alaska current system to < 1 bird/km2 in subtropic waters. Northern distribution records were found for 6 spp. [Pterodroma neglecta, P. arminjoniana, P. cookii, P. alba, P. hypoleuca, Oceanodroma castro]. The subarctic boundary marked the center of the separation between subarctic and subtropic pelagic avifaunas.

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