1. Kinematic measurements recorded as squid approached shrimp and fish.
Kinematic measurements recorded as squid approached shrimp and fish. (A) Mean squid approach velocity increased with increased mean shrimp velocity (linear regression: y=0.6x+4.8, R2=0.3, P=0.001) and mean fish velocity (linear regression: y=0.4x+7.9, R2=0.3, P=0.04). (B) Squid maximum and (C) mean angular velocity (ωmax and ωmean, respectively) increased with greater ventral angles (θva) at the start of approach (squid ωmax for shrimp interactions: linear regression, y=2.9x+135.6, R2=0.4, P<0.001; squid ωmax for fish interactions: linear regression, y=3.5x+155.8, R2=0.4, P=0.009; squid ωmean for shrimp interactions: linear regression, y=0.3x+17.9, R2=0.5, P<0.001; squid ωmean for fish interactions: linear regression, y=0.8x+17.3, R2=0.3, P=0.02).
Rachel A. Jastrebsky et al. J Exp Biol 2017;220:
© Published by The Company of Biologists Ltd