Fig. 3
From: Naval sonar induces an anaerobic swimming gait in beaked whales
B-strokes are more likely to occur in the ascent phase during sonar exposure, especially in shorter dives, and to increase in frequency as sonar sound pressure level rises. (A) Predicted probability of B-stroke presence during ascent as a function of dive duration during pre-exposure baseline (pink) and sonar exposure (blue), based on Model 27 (Table S3). Shaded areas show 95% normal prediction intervals. X-axis rug plot shows data coverage, including both pre-exposure baseline and sonar exposure data. Predictions are provided given a median value for fluke stroke rate during descent and ascent. (B) Expected proportion of B-strokes per-ping interval at different sonar sound pressure levels (SPL) based on the selected model (M1 model from Table S4). Points refer to the mean estimate and bars represent the 95 credible intervals. Plotted estimates refer to the actual data, thus darker areas with denser lines represent received SPLs with more data. The point at 60 dB represents the expected proportion of B-strokes during pre-exposure baseline.
