ESM Tables

ESM Table S1. The maximum detection distances of VEMCO V13-1H transmitters estimated from range testing after deployment of the VR2w receivers at Clerke and Imperieuse Reefs, Rowley Shoals, Australia.

Reef / Receiver location / Maximum detection range (m)
Clerke / C1 / 436
Clerke / C2 / 250
Clerke / C3 / 328
Clerke / C4 / 306
Clerke / C5 / 455
Clerke / C6 / 384
Imperieuse / I2 / 410
Imperieuse / I3 / 354
Imperieuse / I4 / 310
Imperieuse / I5 / 256

ESM Table S2. Detection metrics for each of the receivers at Clerke and Imperieuse Reefs over the duration of the deployment.

Receiver / Code detection efficiency / Rejection coefficient / Rejections/Detections
C1 / 0.731 / 0.000 / 0.000
C2 / 0.425 / 0.008 / 0.020
C3 / 0.288 / 0.012 / 0.041
C4 / 0.376 / 0.005 / 0.014
C5 / 0.359 / 0.006 / 0.017
C6 / 0.359 / 0.007 / 0.018
I1 / 0.000 / 0.000 / 0.000
I2 / 0.451 / 0.008 / 0.017
I3 / 0.190 / 0.003 / 0.013
I4 / 0.468 / 0.000 / 0.000
I5 / 0.263 / 0.004 / 0.016

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Clerke / Imperieuse
Attendance metric / All (n=15) / Females (n=10) / Male (n=5) / All (n=11) / Females (n=4) / Males (n=7)
Shark Total length
(cm) / 1.45 ± 0.21
(1 - 1.69) / 1.51 ± 0.21
(1 - 1.69) / 1.33 ± 0.16
(1.19 - 1.52) / 1.25 ± 0.27
(0.79 - 1.6) / 1.33 ± 0.23
(1.12 - 1.55) / 1.2 ± 0.3
(0.79 - 1.6)
Maximum period of detection / 222 ± 87
(51 - 311) / 240 ± 90
(51 - 311) / 186 ± 76
(105 - 311) / 241 ± 86
(104 - 323) / 269 ± 104
(114 - 323) / 225 ± 78
(104 - 323)
Total number of days detected / 114 ± 92
(22 - 285) / 117 ± 94
(25 - 285) / 108 ± 97
(22 - 259) / 129 ± 94
(20 - 312) / 162 ± 105
(69 - 312) / 110 ± 90
(20 - 265)
Daily detection rate / 0.5 ± 0.29
(0.12 - 0.92) / 0.5 ± 0.3
(0.12 - 0.92) / 0.51 ± 0.31
(0.13 - 0.83) / 0.54 ± 0.32
(0.09 - 0.97) / 0.6 ± 0.26
(0.39 - 0.97) / 0.51 ± 0.37
(0.09 - 0.96)
Total number of detections per shark / 970 ± 1138
(48 - 4096) / 1140 ± 1336
(48 - 4096) / 631 ± 551
(265 - 1593) / 1107 ± 1607
(34 - 5366) / 1648 ± 2482
(246 - 5366) / 798 ± 959
(34 - 2414)
Daily number of detections per shark / 3 ± 4
(0 - 13) / 4 ± 4
(0 - 13) / 2 ± 2
(1 - 5) / 3 ± 5
(0 - 17) / 5 ± 8
(1 - 17) / 2 ± 3
(0 - 7)
Proportion of total daily detections by receivers on the outer-slopes / 0.98 ± 0.03
(0.89 - 1) / 0.98 ± 0.04
(0.89 - 1) / 0.98 ± 0.02
(0.96 - 1) / 1 ± 0.01
(0.98 - 1) / 0.99 ± 0.01
(0.98 - 1) / 1 ± 0
(1 - 1)
Mean daily number of receivers visited per shark / 1 ± 0
(1 - 2) / 1 ± 0
(1 - 2) / 1 ± 0
(1 - 2) / 1 ± 0
(1 - 1) / 1 ± 0
(1 - 1) / 1 ± 0
(1 - 1)

Table S3. Attendance metrics for grey reef sharks (Carcharhinus amblyrhynchos) caught and instrumented at Clerke and Imperieuse Reefs, the Rowley Shoals. Mean values are presented with one standard deviation (SD) and the ranges in brackets.

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