S2. Track lines of harbour porpoises as geographical coordinates from Simulated seal scarer sounds scare porpoises, but not seals: species-specific responses to 12 kHz deterrence sounds

Track lines of harbour porpoises as geographical coordinates relative to the position of the loud speaker (black dot) at position (0,0). Baseline observations (blue), observations made during sound exposure (red) and observations during recovery (green) of harbour porpoises.