Environmental characteristics of lakes showing significant relationships (Spearman p-value< 0.05) with the rate of change in catches computed over the period 2000-2019 (Baikal not included). The color of the circles indicates the level of significance of the long-term trend in catches (p-value<0.05: dark blue; not significant: light blue). Environmental characteristics include logarithm of the lake area (Lake area) and logarithm average volume (Lake volume), total phosphorus concentration according to lake trophic state at the end of the studied period (Reference TP value for trophic status).