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. 2017 Jul 31;372(1729):20160316. doi: 10.1098/rstb.2016.0316

Figure 1.

Figure 1.

Annual ASRs in two groups of Savannah Pumé hunter–gatherers. Lines show year-to-year change in the ASR (proportion of males in the adult population defined as men of ages 16–45 and women of ages 14–36). Shaded area shows Monte Carlo-generated confidence bands for uncertainty around the ASR age interval. (a) ASR for Yaguri, which includes an average of 11.7 (±3.0) adult males and 10.2 (±3.1) females in any one year, and an average ASR of 0.54 (±0.05) across the 25-year sample. (b) ASR for Doro Aná, which includes an average of 12.5 (±2.9) adult males and 12.4 (2.5) females in any one year, and an average ASR of 0.50 (±0.04) across the 25-year sample. (c) Annual ASR for two combined groups of Savannah Pumé hunter–gatherers (a) and (b). The combined population includes an average of 24.2 (4.8) adult males and 22.5 (4.9) adult females in any one year, and an average ASR of 0.52 (±0.03) across the 25-year sample. (See electronic supplementary material, table S1 for annual counts of males and females in each band.)