This paper presents the information about morphological variability and sexual dimorphism of the stone
crayfish (Austropotamobius torrentium) in the area of Korana River in Mrkonjic Grad. The crayfish were caught by
hand made baited traps from October 2018 to May 2019. A total of 46 crayfish were caught, of which 33 males and 13
females. The dimensions of eight morphometric characteristics: body weight (W), body length (TBL), rostrum length
(ROL), rostrum width (ROW), claw length (CLL), carapace length (CPL), carapace width (CPW) and abdomen length
(ABL), were analyzed, both in males and females. Also, the body condition was determined for all individuales. The
measurements results of morphometric characteristics partially matched into the alredy known range of variations.
These data presens first ones for the observed area. By using Mann-Whitey U-test, it was noted that there are signifi-
cant differences between the sexes for W, TBL, CLL, CPL, CPW and ABL. These resuls could be explained by sexual
dimorphism of the stone crayfish.
