Table 1. Summary of the sensory cue(s) removed for each treatment, with the respective control treatment used for comparisons set out on the same line.

Treatments	N	Description	Controls	N	Description
C	119	Control	CC	42	Control—CO2 anaesthesia
CNR	123	Control (no rival)	CCNR	40	Control (no rival)—CO2 anaesthesia
A	83	Auditory removal	CNR	123	Control (no rival)
O	76	Olfactory removal	ONR	81	Olfactory removal (no rival)
T	76	Tactile removal	TNR	81	Tactile removal (no rival)
V	82	Vision removal	VNR	82	Vision removal (no rival)
AO	72	Auditory + Olfactory removal	CNR	123	Control (no rival)
AV	80	Auditory + Vision removal	CNR	123	Control (no rival)
AT	80	Auditory + Tactile removal	CNR	123	Control (no rival)
OV	77	Olfactory + Vision removal	OVNR	72	Olfactory + Vision removal (no rival)
OT	39	Olfactory + Tactile removal	OTNR	42	Olfactory + Tactile removal (no rival)
TV	78	Tactile + Vision removal	TVNR	77	Tactile + Vision removal (no rival)
AOV	82	Auditory + olfactory + vision removal	CNR	123	Control (no rival)
ATV	74	Auditory + tactile + vision removal	CNR	123	Control (no rival)
AOT	38	Auditory + Olfactory removal	CNR	123	Control (no rival)
OTV	39	Olfactory + Tactile + Vision removal	OTVNR	44	Olfactory + Tactile + Vision removal (no rival)
AOTV	42	Auditory + Olfactory + Tactile + Vision removal	CNR	123	Control (no rival)

Note that some control treatments are listed more than once in the table as they act as controls for more than one experimental treatment.