Fig. 1: Isotopic composition of P. hispida and U. maritimus bone samples from Arctic archaeological sites. | Communications Biology

Fig. 1: Isotopic composition of P. hispida and U. maritimus bone samples from Arctic archaeological sites.

From: Zinc isotopes from archaeological bones provide reliable trophic level information for marine mammals

Fig. 1

Pusa hispida (squares, n = 104) and U. maritimus (dots, n = 47) bone samples are colour coded as geographic groups. a Schematic map indicating the archaeological sites analysed and geographic colour coding: Light green for the Bering Strait; dark green for the Amundsen and Coronation Gulf; blue for the CAA; orange for the Hudson Bay; purple for the North Water Polynya; and red for sites influenced by the Labrador Sea in the Hudson Strait and Frobisher Bay. b δ15N versus δ13C plot for P. hispida samples (p-value < 0.05; R2 = 0.21; n = 104). c) δ15N versus δ66Zn plot for P. hispida samples (p-value < 0.05; R2 = 0.08; n = 104). d δ15N versus δ13C plot for U. maritimus samples (no correlation, p-value > 0.05; n = 47). e δ15N versus δ66Zn plot for U. maritimus samples (p-value < 0.05; R2 = 0.42; n = 47). We included already published δ15N and δ13C values4,15,30,31 and already published δ66Zn values from QjJx-115. The map is redrawn and modified using Adobe Illustrator CS6 after www.google.com/maps. Error bars represent the measurement uncertainty.

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