期刊
OECOLOGIA
卷 125, 期 4, 页码 483-488出版社
SPRINGER-VERLAG
DOI: 10.1007/s004420000481
关键词
seabirds; sea-ice; snow petrel; Southern Ocean; survival
类别
The snow petrel Pagodroma nivea is an obligate associate of sea-ice and one of the most abundant seabird species of the Southern Ocean. Time- and sex-specific annual variation in adult survival was estimated using capture-mark-recapture of petrels nesting at Petrels Island, Terre Adelie, 1981-1997. On the basis of a regression analysis, 44% of the variation was linked inversely to the latitudinal extent of sea-ice during winter (June) in the region offshore of the study colony, where this population is likely to spend the non-breeding season. Monthly sea-surface temperature anomalies tended to influence adult survival but the relationship was not statistically significant. Why sea-ice extent should have such a critical effect on this species is yet to be explained, but the relationship, in the context of environmental warming and the consequent potential loss of Antarctic sea-ice, is an important one for this species.
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