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• W2065321502 abstract "In Piedmont (Italy) the environmental changes due to human impact have had profound effects on rivers and their inhabitants. Thus, it is necessary to develop practical tools providing accurate ecological assessments of river and species conditions. We focus our attention on Salmo marmoratus, an endangered salmonid which is characteristic of the Po river system in Italy. In order to contribute to the management of the species, four different approaches were used to assess its presence: discriminant function analysis, logistic regression, decision tree models and artificial neural networks. Either all the 20 environmental variables measured in the field or the 7 coming from feature selection were used to classify sites as positive or negative for S. marmoratus. The performances of the different models were compared. Discriminant function analysis, logistic regression, and decision tree models (unpruned and pruned) had relatively high percentages of correctly classified instances. Although neither tree-pruning technique improved the reliability of the models significantly, they did reduce the tree complexity and hence increased the clarity of the models. The artificial neural network (ANN) approach, especially the model built with the 7 inputs coming from feature selection, showed better performance than all the others. The relative contribution of each independent variable to this model was determined by using the sensitivity analysis technique. Our findings proved that the ANNs were more effective than the other classification techniques. Moreover, ANNs achieved their high potentials when they were applied in models used to make decisions regarding river and conservation management." @default.
• W2065321502 created "2016-06-24" @default.
• W2065321502 creator A5030967120 @default.
• W2065321502 creator A5043131316 @default.
• W2065321502 creator A5066810088 @default.
• W2065321502 date "2009-09-01" @default.
• W2065321502 modified "2023-09-27" @default.
• W2065321502 title "Use of different approaches to model presence/absence of Salmo marmoratus in Piedmont (Northwestern Italy)" @default.
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• W2065321502 doi "https://doi.org/10.1016/j.ecoinf.2009.07.003" @default.
• W2065321502 hasPublicationYear "2009" @default.
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