Table S1.

Comparison of transmitter type specifications of transmitter types used in the study

Transmitter type	Weight, g	Length, mm	Mean ping frequency, s	Ping frequency range, s	Mean burst duration, s	Burst duration range, s	Minimum ping frequency, s
V16P-1L	12.6	80.0	40.5	15–64	2.80	2.00–4.60	17.00
V13P-1L	6.00	33.0	210.0	120–300	3.54	2.22–4.02	122.22

Ping frequency is how often a transmitter emits a signal with the transmitter identification number and the associated depth of the fish encoded for receivers to detect. Burst duration is how long the encoded pings take to emit. Minimum ping frequency therefore is the shortest possible ping frequency plus the minimum burst frequency.