Table 1.
Energy content of foods analysed, and relative time spent feeding on each food item in different seasons during this study.
Table 2.
Quantification of missing values for nutritional analysis, intake rate and food biomass.
Table 3.
Results of the Principal Components Analysis of energy, nutrient and antifeedant intakes by the gorillas.
Fig 1.
Seasonal variation in gorilla diet according to the time spend feeding on the most important food types (the bold box highlights the high-frugivory season).
Fig 2.
Seasonal variation in median nutritional and chemical composition of important foods (see text for definition) consumed exclusively in one of the two seasons (DM: dry matter; OM: organic matter; TNC: total non-structural carbohydrates; WCS: water-soluble sugars).
Bold vertical lines indicate medians; boxes show the first and third quartiles, vertical lines the percentiles 2.5 and 97.5% and laying crosses denote the minimum and maximum. Numbers on the top of the graph denote the sample size.
Fig 3.
Nutrient intake (Factor 1 of PCA; see Tables 3–4a) at times of different food availability.
The line shows the relation between the nutrient intake variables included in factor 1 and food availability as estimated with a GLMM (the model corresponds to that depicted in Table 5). Bold vertical lines indicate medians; boxes show the first and third quartiles, vertical lines the percentiles 2.5 and 97.5% and laying crosses denote the minimum and maximum. Numbers on the top of the graph denote the sample size.
Table 4.
Results of GLMMs with factor scores characterizing intakes as the response (sample size was N = 708 data points from six subjects in all models).
Table 5.
Results of GLMMs with the individual nutrient variables as the response analysed one at a time, showing the influence of fruit availability index (FAI) on all intakes.