Change in skull height Change in skull height Change in skull height
Juveniles (July) to subadults n=221 Juveniles (August) to subadults n=122 Subadults to adults n=144
Year
F1,216=14.8 P=0.0002 F1,117=31.3 P<0.0001
F1,139=10.8 P=0.0013
Age
F1,216=10.9 P=0.0011 F1,117=0.83a P=0.364 F1,139=10.1 P=0.0019
Skull length
F1,216=28.8 P<0.0001 F1,117=7.09 P=0.0089 F1,139=20.7 P<0.0001
Year×age
F1,216=11.7 P=0.0008 F1,117=0.72 P=0.398 F1,139=10.4 P=0.0016