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Related Experiment Video

Updated: Jul 14, 2026

The Vermicelli and Capellini Handling Tests: Simple quantitative measures of dexterous forepaw function in rats and mice

The Vermicelli and Capellini Handling Tests: Simple quantitative measures of dexterous forepaw function in rats and mice

Published on: July 21, 2010

How Food Geometry and Toughness Influence Ingestive Patterns in Lemurs.

Mariana Dutra Fogaça^1,2, Nina Flowers^1,3, Haja Fabrice Razafindrabe Maminiaina⁴

¹Institute of Population Genetics, University of Veterinary Medicine, Vienna, Austria.

American Journal of Primatology

|July 13, 2026

Summary

Food toughness and shape influence where lemurs bite. Lemur catta and Propithecus verreauxi use different strategies based on food properties and their unique jaw structures.

Keywords:

Lemur catta Propithecus verreauxi bite location food mechanical properties ingestion ingestão localização da mordida propriedades mecânicas dos alimentos

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Published on: May 8, 2020

Area of Science:

Primate feeding ecology
Functional morphology
Behavioral ecology

Background:

Understanding feeding behavior is crucial for primate conservation.
Biting location selection is influenced by food properties and species-specific adaptations.

Purpose of the Study:

To determine if food toughness, geometry, or lemur species dictate biting locations.
To compare feeding behaviors of Lemur catta and Propithecus verreauxi.

Main Methods:

Quantified biting locations (anterior, intermediate, posterior) in Lemur catta and Propithecus verreauxi.
Measured food toughness and categorized food geometry (shape, size).
Utilized multinomial logistic regression to analyze predictor variables.

Main Results:

Food toughness and geometry significantly affected biting positions.
Propithecus verreauxi preferred anterior bites for small, non-flat foods, shifting posteriorly with increased toughness.
Lemur catta distributed bites more evenly, while both species used posterior positions for tougher foods.

Conclusions:

Feeding behaviors differ between these lemur species, linked to masticatory morphology.
Species-specific adaptations influence how lemurs process food based on its physical properties.