Age group

Intercept (±SE)

Water velocity [m/s] (±SE)

Pebble size [cm] (±SE)

R

Class 0

(−3.15 ± 0.27)^**

(−1.42 ± 0.30)^**

0.76

Class 1

(65.86 ± 3.41)^**

(0.10 ± 0.03)^**

0.57

Class 2

(71.39 ± 4.43)^**

(0.48 ± 0.21)^*

0.66

Class 3

(52.3 ± 4.36)^**

(0.87 ± 0.26)^*

0.59