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. 2014 Nov 19;2:23. doi: 10.1186/s40462-014-0023-4

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© Gutowsky et al.; licensee BioMed Central Ltd. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Overwinter destinations of laysan and black-footed albatross from Midway. Kernel density analysis of 95%, 75%, 50% and 25% utilization distribution (UD) contours, in increasingly darker shades of blue, for GLS-tracked laysan albatross (n = 18, top panel) and black-footed albatross (n = 15, bottom panel) during the overwinter phase of non-breeding in 2008, 2009, 2011 and 2012. The solid black circle indicates the colony at Midway Atoll National Wildlife Refuge.