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Journal of Applied Ichthyology, vol.23, no.5, pp.616-620, 2007 (SCI-Expanded)
Summary Length-weight (TL vs WWT) and chelae length-width (ChL vs ChW) relationships were described for juveniles, males and females, and for form I and form II males of Procambarus acutus acutus. The length-weight relationships for juveniles, form I, form II males, and females could be described as: WWT = 5 × 10-3 TL3.09, WWT = 6 × 10-3 TL3.61, WWT = 6 × 10-9 TL3.26, and WWT = 6 × 10-4 TL3.5, 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 I 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 I and form II males, the slopes and intercepts of regressions of females were significantly different from form I 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 I and form II males (P < 0.05) and form I and females (P < 0.05). Form I males had longer ChL than form II males and females. The same trend was observed in mean ChW for form I 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. © 2007 Blackwell Verlag.