Supplementary materials; Figure S1 from Ocean warming and acidification may challenge the riverward migration of glass eels.

Detailed Methodology; Simplified view of the binary-choice device used in the behavioural trials to assess locomotor response and cue preference. Two header flasks containing a test cue and sham-water fed to the ‘eel traps’ placed on one end of the choice-chamber. Openings on the opposite side of the traps ensured that the water was kept at a stable height of 6 cm, and two peristaltic pumps (P) delivered water from the header flasks at a constant flow (45 mL min-1), creating the currents to stimulate eel upward movement.