Table 2.

Differences between ACTIVE300⁰ and CONTROL300⁰ at time t₀.

Feature	ACTIVE0		CONTROL0		p-value
	Mean	Std	Mean	Std
Length	1.240	0.286	1.276	0.288	0.416
Head width	0.736	0.070	0.743	0.064	0.762
Max width location	0.592	0.075	0.586	0.071	0.789
Max width	0.844	0.076	0.845	0.062	0.977
Width length ratio	0.702	0.137	0.688	0.132	0.630
Length width ratio	1.898	1.251	1.917	1.231	0.832
Neck width	0.479	0.075	0.505	0.069	0.236
Foot	0.840	0.122	0.855	0.127	0.606
Circumference	4.566	2.329	4.591	2.136	0.834
Area	0.720	0.126	0.748	0.121	0.330
Length area ratio	1.871	0.498	1.837	0.492	0.556

Means and p-values from two-tailed t-tests are shown. Width length ratio and length width ratio are dimensionless, area is in μm² and length area ratio is in μm⁻¹. Other descriptor values are measured in μm. No significant differences between any descriptor values are observed for all geometrical features.