Age and growth of the perch inhabiting the Solina and Roznow dam reservoirs were studied on 124 and 206 perch individuals, respectively. Age of the fish collected in the Solina was found to range from 3 to 10 years (uncertainty coefficient of 17%), the Roznow perch age varying from 2 to 12 years (uncertainty coefficient of 10%). In the Solina dam reservoir, the perch aged 4+ and 5+ were the most numerous groups, the age groups most numerous in the Roznow encompassed the 5+ to 9+ interval. The highest annual body length gains in the Solina reservoir were observed in the perch aged 4+, 6+, 8+, and 9+, the respective gains amounting to 43.2; 44.4; 44.3, and 48.4 g. In the Roznow reservoir, the highest length gains (55 g) were typical of the perch aged 10+ and 12+. Coefficients of condition were found to range within 1.23-1.55 and 1.27-1.62 in the Solina and Roznow reservoirs, respectively.

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