Lmk Morphometric relationship of length-weight and chelae lenght-width of eastern white river crayfish (Procambarus acutus acutus, Girard, 1852) under culture conditions

Length-weight (TL vs WWT) and chelae length-width (ChL vs ChW) relationships were described for juveniles, males and females, and for form 1 and form II males of Procmnbarus acutus acutus. The length-weight relationships for juveniles, form 1, form 11 males, and females could be described as: WWT = 5 x 10 super(-3) TL super(3,09). WWT = 6 x 10 super(-3) TI super(3,61) WWT = 6 x 10 super(-9) TI super(3,26) , and WWT = 6 x 10 super(-4) TL super(3,5), respectively. In all forms, growth was allometric (P < 0.05). The ANCOVA test indicated that slopes and intercepts of the length-weight regressions were significantly different between sex and sexual stages. The regressions for chelae length-width relationships for form 1 and form II males, and females were: ChW = -0.81 + 0.27CL, ChW = -0.33 + 0.25CL, and ChW = -0.82 + 0.32CL, respectively. Although the slope and intercepts of regressions for ChL and ChW were similar for those of form 1 and form II males, the slopes and intercepts of regressions of females were significantly different from form 1 and form II males. No statistical difference was observed in mean ChL between form II males and females (P > 0.05), but a significant difference was detected in mean ChL between form 1 and form II males (P < 0.05) and form 1 and females (P < 0.05). Form 1 males had Tonger ChL than form II males and females. The same trend was observed in mean ChW for form 1 and form II males, but a significant difference was detected between form II males and females (P < 0.05). In addition, results indicated that chelae lengths and widths increased allometrically with total length (TL) for both sex and sexual stages.