Fig. 4

P/B ratios obtained with the weight-specific growth rate method plotted against the instantaneous mortality rate (Z) (dashed line) obtained for males (filled circles) and females (open circles) of Excirolana armata (Souza 1998; this study), and for males (filled square), females (open square) and populations (triangle) of E. braziliensis (Zuñiga et al. 1985; Fonseca et al. 2000; Veloso et al. 2003; Caetano et al. 2006); Allen’s relationship: P/B = Z (full line)