Sterol fraction histogram from the chimpanzee samples.

<p>Relative concentrations are expressed as % of the largest peak compared to TIC (total ion chromatogram) in the chromatogram.</p

Sterol fraction histogram from the gorilla samples.

<p>Relative concentrations are expressed as % of the largest peak compared to TIC in the chromatogram.</p

Stanol and sterol ratios.

<p>Table 2 shows the values obtained when applying the ratio proposed by Bull and co-workers [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0128931#pone.0128931.ref065" target="_blank">65</a>]. Values below 1 have been used as diagnostic for an herbivore diet, whereas values higher than 1 are characteristic of humans. The second ratio is related to sterols of animal origin (C27) and plant origin (C29).</p><p>Stanol and sterol ratios.</p

Chimpanzee stanol partial chromatogram.

<p>Comparison of the m/z 215 ion chromatograms for the neutral lipid fraction from sample 3 (CH5) and 10 (CH3) collected from the same chimpanzee in different moments.</p

Discriminant analysis.

<p>The canonical discriminant analysis plot shows NHP and Neanderthal samples. Group 1 corresponds to the chimpanzee samples, the second to gorillas and the third to Neanderthals.</p

Daily intake of non-protein energy vs. available protein for days 1–30.

<p>Daily intake of non-protein energy vs. available protein for days 1–30.</p

Mineral content of leaves consumed by gorillas at BINP compared to leaves consumed by wild primates at other research sites.

<p>Mineral content of leaves consumed by gorillas at BINP compared to leaves consumed by wild primates at other research sites.</p

Nutritional composition of staple foods expressed on a dry matter basis (>1% of dry mass intake during study period).

<p>NDF = neutral detergent fiber, ADF = acid detergent fiber, ADL = acid detergent lignin, AP = available protein, TNC = total non-structural carbohydrates, E contrb. = contribution of food item to total metabolizable energy intake over the 30 day study period.</p>1<p>nutritional information from U.S. Department of Agriculture <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0070383#pone.0070383-US1" target="_blank">[42]</a>.</p>2<p>nutritional information from Emaga et al. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0070383#pone.0070383-Emaga1" target="_blank">[57]</a>.</p

Mean ratios of minerals in staple foods eaten by Bwindi Mountain gorillas, weighted by daily intake (measured in g) [40].

<p>Staple foods considered accounted for 80% of total diet <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112117#pone.0112117-Reiner1" target="_blank">[40]</a>.</p><p>Mean ratios of minerals in staple foods eaten by Bwindi Mountain gorillas, weighted by daily intake (measured in g) <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112117#pone.0112117-Reiner1" target="_blank">[40]</a>.</p

Cumulative intake of NPE vs. AP across 30 days.

<p>Cumulative intake of NPE vs. AP across 30 days.</p