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Roe deer Capreolus capreolus dispersal in a heterogeneous landscape

Abstract : Dispersal, defined as the movements that take individuals away from their birth site permanently, is a fundamental biological process that impact population dynamic and genetic. In most populations, not all individual disperse, and dispersers are not a random subset of the source population. The general aim of this thesis is to better understand the factors generating inter-individual variability across the three phases of the dispersal behaviour in a large herbivore specie, the European roe deer. In a heterogeneous landscape, more than 100 juveniles from a natural population were captured and equipped with a GPS collar between 2003 and 2012 and then intensively monitored during approximately ten month. This study highlights the role of internal factors (such as individual body mass, behavioural traits before dispersal or sex) and external factors (such as degree of landscape openness) across the different phases of the dispersal process (emigration, transience, immigration). A high interindividual variability of the dispersal behaviour was observed across the whole process, from the preliminary phase to the settlement in the post-dispersal home range. Moreover, some behavioural characteristics of dispersal should reduce the direct and indirect costs associated with dispersal. Due to the important consequences on population fonctionning this interindividual variability on dispersal behaviour may have, it seems essential to take into account this factor when studying dispersal.
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Contributor : Lucie Debeffe <>
Submitted on : Monday, August 24, 2020 - 12:08:00 PM
Last modification on : Wednesday, May 12, 2021 - 8:13:21 AM
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  • HAL Id : tel-02919987, version 1



Lucie Debeffe. Roe deer Capreolus capreolus dispersal in a heterogeneous landscape. Sciences du Vivant [q-bio]. Université Paul Sabatier Toulouse III, 2013. Français. ⟨tel-02919987⟩