Age and growth rate of 99 rudd individuals caught in September 1993 with a fishing rod in the River San backwater near Hurko were determined. Growth rate was estimated with the back calculation technique utilising the linear relationship between the caudal scale radius and body length. Growth rate of the rudd was described with the equation: l.c.(t) = 30.0(1-e-0.0737(t+1.9)) Compared to data from other areas of Poland, the rudd studied showed a very fast growth rate in the first year of life, the growth becoming very slow thereafter.

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