Turn Angle φ as a Function of Determinism Ratio Ψ (a) and as a Function of Contact Angle θ
(b). The turn angle φ is plotted (a) as a function of the determinism ratio Ψ, and (b) as a function of the contact angle θc. As demonstrated in both (a) and (b), when τ << 1 s, φ is always ~-180°. In contrast, when τ >>1 s, φ is always ~0°. Only at τ~10 s is guided migration possible through modulation of cue geometry and strength.