Fig. 7.

Comparison of body size and fecundity between marbled crayfish and P. fallax. (A) Largest marbled crayfish from our laboratory having a total length of 10.3 cm. (B) Clutch of same specimen consisting of 731 eggs. (C) Differences in carapace length between populations of ovigerous marbled crayfish (mc) and P. fallax females (PF) from comparable climatic regions. Data for marbled crayfish (n=57) was obtained in Madagascar (Jones et al., 2009) and data for P. fallax (n=27) was obtained in Florida (Hendrix et al., 2000). Horizontal bars indicate ranges and vertical lines indicate mean values (m) and lower and upper range limits. The difference between marbled crayfish and P. fallax females is highly significant as indicated by the P-value. (D) Differences in clutch size between the same populations as in (C). The difference is highly significant as indicated by the P-value. For statistical calculations, the s.d. was taken as half the range, and a Bonferroni adjustment for multiplicity was applied.