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. 2018 Mar 7;47(Suppl 2):265–280. doi: 10.1007/s13280-018-1032-0

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — Tagging walruses in water. Satellite transmitter mounted on hunter’s harpoon. Photo: Mads Peter Heide-Jørgensen