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. 2024 Oct 23;11(10):240650. doi: 10.1098/rsos.240650

Table 2.

Short-beaked common dolphin response probability to MFAS. Behavioural metric summaries 2 for short-beaked common dolphins for modelled response variables (whistle counts, subgroup counts, UAS group speed) for pre-exposure, exposure and post-exposure phases. Estimates are presented as posterior means (posterior standard deviation). Bolded cells indicate CEEs for which there was a high degree of support (pā€‰>ā€‰0.9) of a difference in the phase-specific probabilities of being in an enhanced state. In some instances where total counts were relatively low overall, high probability changes occurred and are reflected with shading though differences were smaller than the number of significant digits reflected in the table.

CEE # CEE type group whistle counts (s.d.) subgroup counts (s.d.) group speed (km hāˆ’1) (s.d.)
pre-exposure exposure post-exposure pre-exposure exposure post-exposure pre-exposure exposure post-exposure
2017_03 MFAS 0.0 (0.1) 1.9 (3.7) 4.0 (4.7) n/a n/a n/a 17.1 (14.7) 21.6 (14.6) 17.3 (13.8)
2017_04 MFAS 16.2 (2.6) 19.6 (2.3) 19.4 (2.4) 1.7 (0.1) 1.7 (0.1) 1.1 (0.1) 14.3 (9.7) 12.6 (11.5) 12.5 (11.3)
2017_07 MFAS 40.9 (2.6) 34.7 (6.6) 28.2 (3.0) 2.0 (0.1) 2.0 (0.1) 2.0 (0.1) n/a n/a n/a
2019_05 MFASa 47.0 (11.7) 7.9 (5.2) 8.0 (5.4) 4.9 (0.3) 4.2 (0.2) 4.0 (0.2) 10.2 (10.1) 9.1 (5.2) 12.9 (12.0)
2019_10 MFAS 0.0 (0.0) 0.0 (0.0) 0.0 (0.0) 1.3 (0.1) 1.3 (0.1) 1.3 (0.1) 15.5 (16.0) 11.3 (12.4) 13.1 (15.3)
2019_11 MFASaa 0.0 (0.1) 0.1 (0.2) 0.0 (0.1) 1.9 (0.1) 1.9 (0.1) 1.9 (0.1) 6.7 (3.3) 11.3 (9.2) 10.2 (7.3)
2021_12 MFAS 0.0 (0.0) 1.8 (3.2) 0.0 (0.0) 1.3 (0.1) 1.3 (0.1) 1.4 (0.1) 10.5 (6.8) 13.8 (10.0) 11.2 (7.0)
2021_13 MFAS 0.0 (0.0) 0.0 (0.0) 0.6 (0.5) 3.7 (0.1) 3.7 (0.1) 1.9 (0.1) 9.4 (9.4) 13.0 (13.4) 12.6 (12.2)
2017_06 control 1.7 (2.1) 26.4 (8.5) 26.5 (8.4) 2.3 (0.1) 1.0 (0.1) 1.0 (0.1) 11.0 (9.9) 10.8 (11.1) 10.9 (10.4)
2017_08 control 0.1 (0.1) 0.0 (0.1) 0.0 (0.0) 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 8.3 (8.5) 8.6 (7.6) 10.6 (9.5)
2019_02 control 0.8 (0.9) 0.1 (0.2) 0.0 (0.1) 4.7 (0.2) 5.7 (0.3) 4.7 (0.2) 8.1 (3.4) 6.6 (3.6) 8.0 (6.7)
2019_09 control 0.0 (0.1) 0.5 (0.7) 0.0 (0.0) 1.0 (0.1) 1.0 (0.2) 1.0 (0.1) 20.7 (19.5) 17.8 (18.0) 11.5 (13.9)
2021_03 control 0.0 (0.0) 0.0 (0.0) 0.0 (0.0) 3.0 (0.2) 3.1 (0.1) 3.1 (0.2) 8.6 (4.5) 8.6 (4.0) 11.0 (11.1)
2021_05 control 0.0 (0.0) 0.0 (0.0) 0.0 (0.0) 1.1 (0.1) 1.3 (0.1) 1.1 (0.1) 13.6 (12.8) 12.3 (11.5) 16.2 (12.9)
no. changes/total MFAS CEEs n/a 5/8 (62.5%) 6/8 (75%) n/a 1/7 (14.3%) 3/7 (42.9%) n/a 5/8 (62.5%) 2/8 (25%)
no. changes/total control CEEs n/a 5/6 (83.3%) 6/6 (100%) n/a 2/6 (33.3%) 1/6 (16.7%) n/a 0/6 (0%) 2/6 (33.3%)
a

Denotes CEE conducted with operational US Navy dipping MFAS source.

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