Figure 1. Experimental dosing and behavioural testing set-up.

(A) Isolated and (B) In-view dosing. An Individual fish was netted from the holding tank and placed into one of the two dosing containers. In-view fish had visual access to 12 conspecifics held in the conspecific tank but were not able to see the other fish being dosed. Fish remained in the dosing containers for 30-minutes prior to behavioural testing. (C) The circular arena used was 34 cm in diameter and 16 cm in height. (D) The novel object used was a multi-coloured LEGO figurine. E) The thigmotaxis, transition and inner zones were calibrated to 34, 23 and 12 cm in diameter respectively.