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Linking models of animal behaviour and habitat management: Atlantic salmon parr and river discharge

Identifieur interne : 001253 ( Main/Merge ); précédent : 001252; suivant : 001254

Linking models of animal behaviour and habitat management: Atlantic salmon parr and river discharge

Auteurs : J. D. Armstrong [Royaume-Uni] ; C. F. Holm [Royaume-Uni] ; P. S. Kemp [Royaume-Uni] ; D. J. Gilvear [Royaume-Uni]

Source :

Journal of Fish Biology [ 0022-1112 ] ; 2003-12.

RBID : ISTEX:BEE0D3FB4D568FEC3CC27FF11E44E5B30A17DAF2

Abstract

Understanding preferences of animals is of fundamental importance for modelling habitat quality and quantity. Important theoretical developments, for example using ideal free and ideal despotic distributions (IDD), have enabled biologists to build conceptual frameworks for relating habitat preferences of individual animals to distributions and dynamics of populations. At the same time, managers of natural resources have established predictive empirical models as a basis for understanding habitat quality. For example, the Physical Habitat Simulation model (PHABSIM) has been widely applied for managing river flows. The aim of this study was to conduct experiments, using Atlantic salmon parr, to test whether observed population distributions could be predicted using simple behaviour theory and PHABSIM. We show that predictions from PHABSIM depend crucially on population density, discharge and the interaction between density and discharge at the time when the model is parameterized. These findings can, in part, be explained by consideration and application of the IDD. However, the results of the experiments also suggest that models derived from first behavioural principles may need to be unexpectedly complex and species‐specific if they are to capture the population response to variations in water discharge effectively.

Url:

https://api.istex.fr/document/BEE0D3FB4D568FEC3CC27FF11E44E5B30A17DAF2/fulltext/pdf

DOI: 10.1111/j.1095-8649.2003.0216a.x

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<front><div type="abstract" xml:lang="en">Understanding preferences of animals is of fundamental importance for modelling habitat quality and quantity. Important theoretical developments, for example using ideal free and ideal despotic distributions (IDD), have enabled biologists to build conceptual frameworks for relating habitat preferences of individual animals to distributions and dynamics of populations. At the same time, managers of natural resources have established predictive empirical models as a basis for understanding habitat quality. For example, the Physical Habitat Simulation model (PHABSIM) has been widely applied for managing river flows. The aim of this study was to conduct experiments, using Atlantic salmon parr, to test whether observed population distributions could be predicted using simple behaviour theory and PHABSIM. We show that predictions from PHABSIM depend crucially on population density, discharge and the interaction between density and discharge at the time when the model is parameterized. These findings can, in part, be explained by consideration and application of the IDD. However, the results of the experiments also suggest that models derived from first behavioural principles may need to be unexpectedly complex and species‐specific if they are to capture the population response to variations in water discharge effectively.</div>
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Linking models of animal behaviour and habitat management: Atlantic salmon parr and river discharge

Linking models of animal behaviour and habitat management: Atlantic salmon parr and river discharge

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Abstract

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