Work

Mycophagy in Primates of the Issa Valley, Tanzania

Year: 2025

Type: article

Abstract: ABSTRACT Mycophagy (fungi consumption) is an important animal‐ecosystem interaction and provides nutrients for numerous mammalian taxa, such as primates. Although mushroom consumption is a widespread behavior documented in about a quarter of all known primate species, surprisingly little is known about their use of mushrooms as either a staple or fallback food and the relationship between mushroom availability and consumption. We used direct observational data on mushroom consumption in the diet of three sympatric primate species: chimpanzees ( Pan troglodytes schweinfurthii ) and red‐tailed monkeys ( Cercopithecus ascanius ) from 2019 to 2022, and yellow baboons ( Papio cynocephalus ) from 2015 to 2022 in a mosaic woodland habitat in the Issa valley, western Tanzania, to address these gaps. We analyzed mushroom consumption patterns and assessed mushroom availability from line transects for a period of 15 months (Oct 2022—Dec 2023). Our findings show that mushrooms were a consistent dietary component for all three species during the wet season (October–April; chimpanzees—4%, baboons—17% and red‐tailed monkeys—4%), while baboons also continued to consume mushrooms (~11% of their annual diet) even when availability was low outside the wet season. This is also the first report of mushroom consumption by red‐tailed monkeys. We conclude that mushrooms serve as a fallback resource for Issa chimpanzees and red‐tailed monkeys, while they represent a preferred food for Issa baboons. We contextualize mushroom consumption as a potential strategy of niche partitioning to reduce interspecific feeding competition and underscore the importance of mycophagy and its role in primate dietary ecology and human evolution.

Source: Ecology and Evolution

DOI: 10.1002/ece3.72000