Faculté des Sciences
Faculté des Sciences

Feeding ecology in Propithecus edwardsi: how the social hierarchy and the environment influence the food composition

Emo, Florian ULiège
Promotor(s) : Brotcorne, Fany ULiège ; Wright, Patricia
Date of defense : 5-Sep-2022 • Permalink :
Title : Feeding ecology in Propithecus edwardsi: how the social hierarchy and the environment influence the food composition
Translated title : [fr] L'écologie alimentaire du Propithecus edwardsi : comment la hiérarchie sociale et l'environnement influencent la composition alimentaire
Author : Emo, Florian ULiège
Date of defense  : 5-Sep-2022
Advisor(s) : Brotcorne, Fany ULiège
Wright, Patricia 
Committee's member(s) : Gazagne, Eva ULiège
Beudels, Roseline 
Moula, Nassim ULiège
Language : English
Number of pages : 87
Keywords : [en] Milne-Edwards' sifaka
[en] feeding ecology
[en] Propithecus edwardsi
[en] lemurs
[en] P. edwardsi
[en] feeding propithecus
[en] sifaka
[en] sifakas
[en] food composition sifaka
[en] food composition
[en] optimal feeding index
[en] shannon diversity index
Discipline(s) : Social & behavioral sciences, psychology > Animal psychology, ethology & psychobiology
Research unit : Centre ValBio
Target public : Researchers
Professionals of domain
General public
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en biologie des organismes et écologie, à finalité approfondie
Faculty: Master thesis of the Faculté des Sciences


[en] This study was performed by Florian EMO at Centre ValBio in 2022, under the direction of P.
Wright and F. Brotcorne. The Milne-Edwards’ sifaka is a lemur species who live in the
Southeastern of Madagascar. This species is the mainly seeds disperser in the submountain
rainforest but is threatened by change climate and habitat disturbance. Many studies are
interested in this species, to optimize the conservative approach and reduce damage to
habitats and therefore the food resources, whose threats about it is constantly expanding. In
this study, we focused on the feeding ecology, especially how the social hierarchy and the
environment influence the food composition. In this behavioral study, 4 groups of sifakas
were followed for five-consecutive-day by using continuous sampling. The influence of the
dominance rank, the sex, the age, the pregnancy, and the site were observed. We also
observed the influence of the change climate and the habitat disturbance. An influence of the
sex, the pregnancy and the site on the food composition were observed. Moreover, we
constate that the change climate disturbs the food abundance then the food composition. We
also note that the activity budget differs between sites. These results argue that the feeding
ecology is defined by the sex and influenced by the pregnancy status. The age and dominance
rank has no influence. The time spent in feeding behavior differs between sites. Moreover, the
species richness differs between both sites, therefore the food composition too. The food
composition is also influenced by the habitat disturbance and the change climate over several
years. Habitat disturbance plays a significant role in the feeding ecology of sifaka. It is
therefore essential to minimize this destruction to try to halt the decline of populations of this



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  • Emo, Florian ULiège Université de Liège > Master biol. orga. & écol., fin.


Committee's member(s)

  • Gazagne, Eva ULiège Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
    ORBi View his publications on ORBi
  • Beudels, Roseline
  • Moula, Nassim ULiège Université de Liège - ULiège > Dpt. de gestion vétérinaire des Ressources Animales (DRA) > Dpt. de gestion vétérinaire des Ressources Animales (DRA)
    ORBi View his publications on ORBi
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  • Total number of downloads 2

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