Length-weight relationship and condition factors of white bream (Blicca bjoerkna (Linnaeus, 1758)) from the Kyiv Reservoir

This study was conducted to determine length-weight relationship (LWR), condition factor (K), and relative condition factor (Kn) of white bream Blicca bjoerkna (Linnaeus, 1758), inhabiting the Kyiv Reservoir (Upper Dnieper, Ukraine). Fishes aged 0+ to 19+ were analysed. Length-weight relationships were found to be W = 0.0439 x SL2.8442 (R2 = 0.9845), W = 0.0320 x SL2.9284 (R2 = 0.9736) and W = 0.0332 x SL2.9267 (R2 = 0.9794) for females, males and combined sexes, respectively. A negative allometric growth (b < 3) was observed for all samples. Calculation of average K resulted as 2.74±0.11 for females, 2.60±0.11 for males and 2.68±0.12 for all specimens. Average Kn of these groups were found to be 1.03±0.04, 0.97±0.04 and 1.00±0.04, respectively. This study is the first reference on LWR equation parameters and Kn of B. bjoerkna in the Dnieper River.