https://phys.org/news/2018-06-monkeys-fats-carbs.html

Published in Functional Ecology, the researchers analysed the nutritional content of all foods the monkeys consumed in order to calculate the nutrient composition of the monkeys' diets, and then assessed the additional energy the monkeys used to regulate their temperature in winter compared with spring.

Professor David Raubenheimer, the University of Sydney's Leonard P Ullmann Chair in Nutritional Ecology at the School of Life and Environmental Sciences and Charles Perkins Centre, conducted the study's nutritional modelling using nutritional geometry, a multidimensional framework that explores how animals balance the ingestion of multiple nutrients.