2019
DOI: 10.1002/ajpa.23782
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Stable isotope variation in savanna chimpanzees (Pan troglodytesverus) indicate avoidance of energetic challenges through dietary compensation at the limits of the range

Abstract: Objectives: Food scarcity is proposed to be a limitation to chimpanzees at the limits of their range; however, such a constraint has never been investigated in this context. We investigated patterns of δ 13 C and δ 15 N variation along a latitudinal gradient at the northwestern West African chimpanzee (Pan troglodytes verus) range limit with the expectation that isotope ratios of chimpanzees at the range limit will indicate different dietary strategies or higher physiological constraints than chimpanzees furth… Show more

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Cited by 16 publications
(33 citation statements)
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References 75 publications
(125 reference statements)
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“…Our discovery of chimpanzees at Hérémakhono led to amendments of the IUCN range limits for the western chimpanzee, as chimpanzee presence had not been previously verified north of the Parc National de Niokolo Koba (Figure 1; Humle et al 2008;Humle et al 2016). Based on data collected via interviews and reconnaissance surveying at eight sites north of the Hérémakhono site, data suggest that Hérémakhono represents the very northern-most vestige of chimpanzee distribution or is very near to it (Wessling et al 2019). These results match findings by Lindshield et al (2014) who surveyed an additional five sites north of Hérémakhono to confirm chimpanzee absence.…”
Section: Methodssupporting
confidence: 61%
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“…Our discovery of chimpanzees at Hérémakhono led to amendments of the IUCN range limits for the western chimpanzee, as chimpanzee presence had not been previously verified north of the Parc National de Niokolo Koba (Figure 1; Humle et al 2008;Humle et al 2016). Based on data collected via interviews and reconnaissance surveying at eight sites north of the Hérémakhono site, data suggest that Hérémakhono represents the very northern-most vestige of chimpanzee distribution or is very near to it (Wessling et al 2019). These results match findings by Lindshield et al (2014) who surveyed an additional five sites north of Hérémakhono to confirm chimpanzee absence.…”
Section: Methodssupporting
confidence: 61%
“…Hérémakhono chimpanzees do appear to avoid severe nutritional deficits (as evidenced by δ 15 N comparisons) by depending on fallback foods exceptional to dietary patterns of other chimpanzees in the region ( 13 C enriched dietary items e.g., C4 grasses or domestic crops: Wessling et al 2019). One potential candidate may be an increased reliance on Acacia food items, as the Hérémakhono flora was disproportionately comprised of consumed Acacia species relative to the other sites.…”
Section: Discussionmentioning
confidence: 99%
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