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Population Dynamics of Grayling: Modelling Temperature and Discharge Effects

Published online by Cambridge University Press:  15 May 2008

S. Charles ,
J.-P. Mallet  and
H. Persat
S. Charles*
Affiliation:
Laboratoire de Biométrie et Biologie Evolutive, UMR 5558 CNRS University Lyon 1, 69622, Villeurbanne, France
J.-P. Mallet
Affiliation:
ASCONIT Consultants, Espace Scientifique Tony Garnier, 69366 Lyon, France
H. Persat
Affiliation:
Ecologie des Hydrosystèmes Fluviaux, UMR 5023, CNRS University Lyon 1, 69622, Villeurbanne, France
*
[email protected]
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Abstract

We propose a matrix population modellingapproach in order to describe the dynamics of a grayling(Thymallus thymallus, L. 1758) population living in the Ainriver (France). We built a Leslie like model, which integrates theclimate changes in terms of temperature and discharge. First, weshow how temperature and discharge can be related to life historytraits like survival and reproduction. Second, we show how to usethe population model to precisely examine the life cycle ofgrayling : estimated numbers of individuals at the beginning ofthe reproduction season, estimated number of individuals insummer, comparison between observed and simulated numbers ofindividuals. Finally, we discuss our results in the framework ofthe assessment of impact of possible climate changes on graylingpopulations.

Keywords

matrix population modellingriverinefishThymallustemperaturedischargeclimate change
Type
Research Article
Information
Mathematical Modelling of Natural Phenomena , Volume 1 , Issue 1: Population dynamics , 2006 , pp. 31 - 48
Copyright
© EDP Sciences, 2006

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