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Food preferences

With 46 out of the 66 binary combinations the lemurs displayed a significant preference for one of the two options. Apple was significantly preferred over all other food items. Sweet potato, melon, beetroot, carrot and egg were also significantly preferred over several other items. Eggplant, pumpkin, cabbage, cucumber, tomato and meal worm were never preferred over any other food item.

The choice behaviour of the lemurs (N=4). The first value applies to the food item on the left and the second value to the food item on the top. Indicates a significant preference for the food item on the left. n.s indicates a lack of a significant preference.

Food preference rankings

 

This table summarizes the choices made by the lemurs according to two criterions I used tto categorize the points I gave all foods during the choice process. Here we can see that apple was clearly the most attractive among the 12 food items, followed by sweet potato and melon. In contrast, meal worm, cabbage, tomato and cucumber were clearly the least attractive food items.

All four lemurs displayed similar rankings of preference for the 12 food items as their rankings all significantly correlated with each other (Spearman rs ≥ 0.62, P<0.05).

 

 

Food items and their rank order of preference

Food preference rankings and nutritional content

The food preference rankings displayed by the lemurs were highly significantly correlated with the content of carbohydrates and sucrose (Spearman, p<0.01). This was true both when the four lemurs were considered separately and when they were considered as a group. The food preference rankings did not correlate significantly with any other macro- or micronutrients. 

Spearman rank-order correlations between food preference rankings and the nutritional values of the food items.


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Last updated: 05/09/20