Intercept (±SE)

Water velocity [m/s] (±SE)

Pebble size [cm] (±SE)

R

Density

(−4.12 ± 0.29)^***

(3.52 ± 0.30)^***

0.81

Total length

(30.3 ± 4.96)^***

(1.88 ± 0.27)^***

0.68