Table 1.

Field mensurative experiment.

	Scaled disc area				Maximum disc tenacity				Scaled stem breaking force
	Num DF	Den DF	F	P	Num DF	Den DF	F	P	Num DF	Den DF	F	P
Population	2	74	17.30	<0.001	2	74	12.06	<0.001	2	61	0.32	0.73
Body location	2	74	44.23	<0.001	2	74	0.77	0.47	2	61	11.79	<0.0001
Population: Body location	4	74	0.19	0.94	4	74	0.56	0.69	4	61	0.12	0.98

Analysis of variance table of the linear mixed model assessing sea urchin scaled tube foot disc area (mm² mL⁻¹), maximum disc tenacity (MPa), and scaled stem breaking force (mm² mL⁻¹) of sea urchins from three different populations. Fixed factors include population (native to mudstone [Palomarin Beach], native to granite [Bodega Bay], and native to sandstone [Bean Hollow Beach]) and body location (oral, ambital, and aboral). Sea urchin ID was included as a random factor to account for multiple measurements on the same individual. Num and den DF refer to the degrees of freedom associated with the model and model error, respectively.