Length-Weight Relationship And Condition Factor Of The Cactus Roach (Rutilus Virgo) In The Perućac Reservoir (Serbia)

Abstract

The length-weight relationship and condition of 35 individuals of the cactus roach, caught in June 2017 in the Perućac reservoir, were analysed. The average length (± SD) of the sampled individuals was 29.8 ± 6.1cm and the average weight (± SD) was 334 ± 215 g. Age ranged from 2+ to 5+ years, and almost half of individuals were aged 2+. The regres-sion coefficient of the length-weight relationship was b > 3, which indicates a positive allometric growth. The Fulton’s condition factor ranged from 0.94 to 1.27, with the mean value (± SD) of 1.09 ± 0.09. Allometric condition factor ranged from 0.49 to 0.62, with the mean value (± SD) of 0.56 ± 0.04.