Cutting fruit, adding fiber calmed orangutans and reset their gut bacteria
Duvivier C, Obregon D, Mateos-Hernandez L, Maitre A, Piloto-Sardiñas E
Soil Health
The fiber-rich leaves, bark, and unripe fruit that wild orangutans forage for look nothing like the sugary produce stacked in most zoo diets, and this study shows that mismatch has real consequences for animal health, a reminder that the 'natural' diet of any species is usually tougher and leafier than the cultivated version we imagine.
Scientists took five orangutans at a zoo and slowly swapped their sugary fruit-heavy meals for a diet loaded with fiber and no fruit at all, over twelve weeks. The change shifted the mix of bacteria living in their guts, specifically boosting fiber-loving microbe groups, and the orangutans ended up calmer, more social, and in better physical shape. It's a reminder that what counts as a 'natural' diet for a wild animal often looks very different from what gets served in captivity.
Key Findings
Transitioning orangutans from a fruit-rich to a high-fiber, fruitless diet over 12 weeks significantly shifted gut microbial richness and diversity
Fiber-fermenting taxa, including Prevotella and Ruminococcaceae, increased in abundance alongside the dietary change
Behavioral improvements accompanied the microbiome shift: increased feeding duration (p < 0.001), reduced stress behaviors and increased social interaction (p < 0.05)
chevron_right Technical Summary
Zoo researchers swapped a fruit-heavy diet for a high-fiber, fruit-free one in captive orangutans and found it reshaped their gut bacteria, improved body condition, and calmed stress behaviors. The findings suggest fruit-dominated diets, common in zoos, may not match what wild orangutans actually eat in the forest.
Abstract Preview
Original paper
Impact of a High-Fiber, Fruitless Diet on the Gut Microbiome, and Health of Captive Orangutans.
Diet is a crucial factor in modulating the gut microbiome, and understanding these interactions in captive primates is essential for their health and welfare. This study assessed the impact of the ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Nanoplastics interfere with plant-mycorrhizal communication and limit plant growth.
Microplastics breaking down in your garden soil are quietly strangling the beneficial fungi that help your vegetables absorb phosphorus and other nutrients, ...
Foraging refers to the search for and acquisition of wild food resources, encompassing the behavioral strategies animals use to locate and consume plants and other organisms. In plant science, understanding foraging behavior is critical because it illuminates plant-animal interactions, including
arrow_forward Explore topic