Table 1. Observer error for each landmark in the defended and undefended morphs.
Intra-observer error Intra-observer error
Landmark
Defended, standard error (unitless) Undefended, standard error (unitless)
1 – eye 0.74 x 10-3 0.70 x 10-3
2 – neckteeth defence (or corresponding area) 0.61 x 10-3 0.64 x 10-3
3 – base of the tail 0.81 x 10-3 0.69 x 10-3
4 – dorsal midpoint 0.59 x 10-3 0.61 x 10-3
5 – ventral midpoint 0.77 x 10-3 0.76 x 10-3
6 – rostrum 0.92 x 10-3 0.92 x 10-3
Mean 0.74 x 10-3 0.72 x 10-3
Maximum 0.92 x 10-3 0.92 x 10-3
Minimum 0.59 x 10-3 0.61 x 10-3