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. 2011 May 11;6(5):e19487. doi: 10.1371/journal.pone.0019487

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Lang et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Absolute (A) and mass specific (B) daily mass, fat and protein loss and daily energy expenditure of primiparous (n = 15) and multiparous (n = 15) grey seal females between early and peak lactation. Values are means ± standard error, open circles are raw values.