Elevated CO2 does not alter behavioural lateralization in free‐swimming juvenile European sea bass ( Dicentrarchus labrax) tested in groups

This data was collected by observing N=260 free-swimming juvenile European sea bass (Dicentrarchus labrax) (reared in either: ambient conditions; OA conditions; or reared in ambient conditions but tested in OA water) in groups of 10 individuals in a circular tank. Fish positions were recorded over a 1 hour period via an overhead Panasonic HDC-SD60 HD camera, with fish positions then quantified using idTracker and processed in Matlab as x-y cartesian co-ordinates relative to the circular tank (Collected by M Duteil in a previous experiment https://doi.org/10.5061/dryad.2dc8k) Such coordinates were then converted into angles to reflect turning preference (Sea_Bass_ALL_Angles - paper). This was accomplished by taking a mean standard deviation in turn angle (76°) for all fish in all experiments when moving at speeds greater than 0.7 cm/s.