Reconstructing Temporal Variation in Great Ape and Other Primate Diets: A Methodological Framework for Isotope Analyses in Hair

The study discussed the use of stable isotope analysis of carbon and nitrogen in hair as a method to reconstruct feeding behavior in primates, particularly great apes. This non-invasive technique allowed researchers to sample hair from nests and analyze dietary variations over time, capturing seasonal patterns that were otherwise difficult to observe. The research highlighted the importance of understanding the biochemical properties of hair keratin, its growth cycle, and isotope turnover rates for accurate data interpretation. The study also introduced new isotopic data from infant bonobo hair, offering insights into nursing and weaning behaviors. The article aimed to provide methodological recommendations for sample collection and preparation, encouraging the use of this approach to better understand primate feeding ecology.