Roach spawners 305 were collected during fishing carried out in the Solina dam reservoir and 256 roach spawners in the Tresna dam reservoir within 1997-2001.The individual body length and body weight of the fish were measured, additionally scales were collected for the age estimation. The growth of fish were determined by empirical measurements. Coefficients of condition were estimated using the Fulton formula. The results showed that roach from the Solina reservoir was at age 3-8, with the predominated age-classes of 4+ (33.3% of the whole sample) and 5+ (39%). The roach from the Tresna reservoir was at age 2-11, and the participation of fish in the particular age-classes ranged from 6% (2+) to 13.8% (4+). The highest value of the mean annual body length increment was observed at age 4+ (3.3 cm) and the lowest at age 8+ (0.6 cm) in the Solina reservoir. Similar results were obtained in case of the roach from Tresna reservoir, which showed the highest mean annual body length increment at age 4+ and the lowest at age 8+. The highest annual body weight increment of roach in Solina was recorded at age 4+ (53.9 g) and 7+ (49 g), whereas the lowest one at age 5+ (24.5 g), 6+ (26.8 g) and 8+ (8.5 g). In the case of roach from Tresna the highest annual body weight increments were noted at age 9+, 6+ and 7+ : 95.0, 57.3 g and 51.2 g, respectively. The values of condition coefficient were similar in both reservoires. No significant differences were observed between values of the annual body length and weight increments of the particular age-classes from the Solina and Tresna dam reservoires.

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