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Stable isotope ratios of Thin-billed prions from wrecks. Carbon stable isotope ratios of birds found dead on beaches in winter, compared to birds sampled in the Falklands Islands in the breeding season. The dotted trendline was calculated from the breeding season birds only, but the clustered data distribution did not allow us a regression analysis. In 3B, recent and historic samples of Wilson's storm-petrels were included for comparison.
