Fig. 6

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Analyse en composante principale des variables hydrologiques des stations hydrométriques du haut bassin de l’Ariège influençant les phases du cycle biologique de la truite. Les deux 1ers axes expliquent 95 % de la variance.
Principal composant analysis of hydrological variables of the gauging stations of high Ariège basin influencing the phases of the biological cycle of trout. The first two axe accounted for 95% of variance.
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