Disparities in the average total body length among the three strains were not statistically different (F6: 92.8 mm, F5: 90.5 mm, unimproved: 88.9 mm, p = 0.572) ( Table 1). AFCR differed significantly (p = 0.044, Table 1) among the strains and was lowest for F6, intermediate in F5 and highest in the unimproved strain.