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首页> 美国政府科技报告 >Bilogy of Wintering Marine Birds and Mammals in the Northern Gulf of Alaska. EXXON VALDEZ Oil Spill Restoration Project Final Report
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Bilogy of Wintering Marine Birds and Mammals in the Northern Gulf of Alaska. EXXON VALDEZ Oil Spill Restoration Project Final Report

机译：阿拉斯加北部海域的越冬海洋鸟类和哺乳动物。 EXXON VaLDEZ溢油修复项目最终报告

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We examined the distribution and abundance of marine birds and mammals in the northern Gulf of Alaska over five seasons during the winters of 1997-2001. We recorded 58 species of seabirds, which were dominated numerically by five species$ species-richness was greatest in October and May and lowest in December and March. Abundance was greatest in May and October, in the winters of 1997-1998 and 1999-2000, and, depending on the species, at the shelf-break front or in the mid-shelf. The shelf-break front is highly important to the over-winter survival of a variety of bird and mammal species, the mid-shelf zone appears to be important to a suite of diving seabirds that concentrate on nekton, especially fishes. We recorded 10 species of marine mammals, which were dominated numerically by Dall's Porpoises$ the seasonal pattern of species-richness was identical to that seen for seabirds. Abundance of Dall's Porpoises was greatest in the Alaska Coastal Current, whereas several other species were concentrated at the shelf-break or widespread. We conclude that an at-sea monitoring program can provide valuable information on wintering seabirds and recommend that a seabird monitoring component be added to the proposed Gulf Ecosystem Monitoring Program.

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