Brosse S., Guégan Jean-François, Tourenq J.N., Lek S. (1999). The use of artificial neural networks to access fish abundance and spatial occupancy in the littoral zone of a mesotrophic lake. In :
Lek S. (ed.), Guégan Jean-François (ed.). Application of artificial neural networks in ecological modelling. Ecological Modelling, 120 (2-3), p. 299-311. Applications of ANNs to Ecological Modelling : International Workshop, Toulouse (FRA), 1998/12. ISSN 0304-3800.
Titre du document
The use of artificial neural networks to access fish abundance and spatial occupancy in the littoral zone of a mesotrophic lake
Année de publication
1999
Auteurs
Brosse S., Guégan Jean-François, Tourenq J.N., Lek S.
In
Lek S. (ed.), Guégan Jean-François (ed.), Application of artificial neural networks in ecological modelling
Source
Ecological Modelling, 1999,
120 (2-3), p. 299-311 ISSN 0304-3800
Colloque
Applications of ANNs to Ecological Modelling : International Workshop, Toulouse (FRA), 1998/12
The present work describes a comparison of the ability of multiple linear regression (MLR) and artifical neural networks (ANN) to predict fish spatial occupancy and abundance in a mesotrophic reservoir. Models were run and tested with 306 observations obtained by the sampling point abundance method using electrofishing. For each of the 306 samples, the relationships between physical parameters and the abundance and spatial occupancy of various fish species were studied. For the 15 fish species occurring in the lake, six main fish populations were retained to perform comparisons between ANN and MLR models. Each of the six MLR and ANN models had eight independent environmental variables (i.e. depth, distance from the bank, slope of the bottom, flooded vegetation cover, percentage of boulders, percentage of pebbles, percentage of gravel and percentage of mud) and one dependent variable (fish density for the considered population). To determine the population assemblage, principal component analysis (PCA) was performed on the partial coefficients of the MLR and on the relative contribution of each independent variable of ANN models (determined using Garson's algorithm). The results stress that ANN are more suitable for predicting fish abundance at the population scale than MLR. In the same way, a higher level of ecological complexity, i.e. community scale, was reliably obtained by ANN whereas MLR presented serious shortcomings. These results show that ANN are an appropriate tool for predicting population assemblage in ecology. (Résumé d'auteur)
Plan de classement
Dynamique de populations / modélisation [036EAUCON01]
;
Intelligence artificielle [122INTAR]
Descripteurs
POISSON D'EAU DOUCE ; MILIEU LACUSTRE ; LITTORAL ; DISTRIBUTION SPATIALE ; ABONDANCE ; STRUCTURE DE POPULATION ; METHODE D'ANALYSE ; MODELISATION ; ANALYSE EN COMPOSANTES PRINCIPALES ; INTELLIGENCE ARTIFICIELLE ; ANALYSE DE REGRESSION ; ETUDE COMPARATIVE
Description Géographique
FRANCE
Localisation
Fonds IRD [F A010020706]
Identifiant IRD
fdi:010020708
