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Seasonal variation in diet and nutrition of the northern‐most population of Rhinopithecus roxellana
Ist Teil von
American journal of primatology, 2018-04, Vol.80 (4), p.e22755-n/a
Ort / Verlag
United States: Wiley Subscription Services, Inc
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
There is a great deal of spatial and temporal variation in the availability and nutritional quality of foods eaten by animals, particularly in temperate regions where winter brings lengthy periods of leaf and fruit scarcity. We analyzed the availability, dietary composition, and macronutrients of the foods eaten by the northern‐most golden snub‐nosed monkey (Rhinopithecus roxellana) population in the Qinling Mountains, China to understand food choice in a highly seasonal environment dominated by deciduous trees. During the warm months between April and November, leaves are consumed in proportion to their availability, while during the leaf‐scarce months between December and March, bark and leaf/flower buds comprise most of their diet. When leaves dominated their diet, golden snub‐nosed monkeys preferentially selected leaves with higher ratios of crude protein to acid detergent fiber. While when leaves were less available, bark and leaf/flower buds that were high in nonstructural carbohydrates and energy, and low in acid detergent fiber were selected. Southern populations of golden snub‐nosed monkey can turn to eating lichen, however, the population studied here in this lichen‐absent area have adapted to their cool deciduous habitat by instead consuming buds and bark. Carbohydrate and energy rich foods appear to be the critical resources required for the persistence of this species in temperate habitat. The dietary flexibility of these monkeys, both among seasons and populations, likely contributes to their wide distribution over a range of habitats and environments.
Rhinopithecus roxellana diet is highly variable among seasons. In the cold months, when leaves were less available, bark and leaf/flower buds were eaten. Non‐structural carbohydrate rich foods are important for this temperate population.