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. 2010 Jan 8;31(1):133–156. doi: 10.1007/s10764-009-9387-5

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© The Author(s) 2009

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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Fig. 3 — (a) Best fit lines for age at first reproduction for raider and nonraider females across the study period (b) Best fit lines for age at first reproduction for raider and nonraider females including infants born after study period. Best fit to raider data is linear (y = −0.1298x = 6525.6); best first to nonraider data is curvilinear (y = 6E-05x ²–3,8762x + 6245)