Table 1.

Results of ANCOVAs Testing the Effect of A) Ecological and Temporal Context (Modern with Sea Otters, Modern Without Sea Otters, and Ancient Mussels) and B) Occupation Time (Years) on the Relationship Between California Mussel Length (mm) and the Log-Transformed Proportion of California Mussels on the South Coast and Central Coast

Model Region	Interaction Term	F	P
(A) Modern-Ancient
Log10(Proportion) of mussels ~ Length + Context + Length*Context
South Coast	Length*Context	6.17	0.005*
Central Coast	Length*Context	8.02	0.001*
(B) Modern
Log10(Proportion) of mussels ~ Length + Occupation time + Length*Occupation time
South Coast	Length*Occupation time	2.23	0.098
Central Coast	Length*Occupation time	13.57	1.78e–07*

Significant effects are starred.