A study conducted by the Durrell Institute of Conservation and Ecology (DICE) has found that cultivated foods offer chimpanzees in West Africa more energetic benefits than wild foods available in the region.
The findings have made a significant development for our further understanding into human-primate coexistence and can help inform conservation efforts for future improvement, particularly in locations where agricultural expansion is encroaching on tropical forests.
Dr Nicola Bryson-Morrison and Dr Tatyana Humle examined the macronutrient content of 24 wild and 11 crop foods consumed by chimpanzees in Bossou, Guinea in West Africa.
It was found that cultivated fruits were higher in easily-digestible carbohydrates and lower in insoluble fibre than wild fruits, while wild fruits were higher in protein. Higher easily-digestible carbohydrates provide more energy.
Oil palm food parts were relatively rich in carbohydrates, protein, lipids and fermentable fibre, adding nutritional support for the importance of the oil palm for West African chimpanzees inhabiting human-dominated environments.
When compared with published macronutrient measures of crops from Bulindi, Uganda in East Africa, the composition of wild fruits, leaves and pith were consistent with previous reports for primate diets. Furthermore, no differences were found in the composition of cultivated fruits, suggesting macronutrient content alone does not explain differences in primates’ crop selection. This confirms the idea that food-crop selection in chimpanzees is partly cultural.
Dr Bryson-Morrison said, “Our research has built on the current understanding of chimpanzee feeding ecology within forest‐agricultural mosaics. By providing further validation that nutritionally dense crops offer primates energetic benefits over wild foods, this study has widened scope for more research into human-primate interactions in relation to shared resources and species-specific dietary needs.”
The research paper, The macronutrient composition of wild and cultivated plant foods of West African chimpanzees (Pantroglodytesverus) inhabiting an anthropogenic landscape, has been published in The American Journal of Primatology. (DOI: https://doi.org/10.1002/ajp.23102)