Data from: First indications that northern bottlenose whales are sensitive to behavioural disturbance from anthropogenic noise

• Main Authors: Miller, P. J. O., Kvadsheim, P. H., Lam, F. P. A., Tyack, P. L., Curé, C., DeRuiter, S. L., Kleivane, L., Sivle, L. D., van IJsselmuide, S. P., Visser, F., Wensveen, P. J., von Benda-Beckmann, A. M., Martín López, L. M., Narazaki, T., Hooker, S. K.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2015
• Subjects: behavioural response; bottlenose whale; naval sonar; Hyperoodon ampullatus; hyperoodon ampullatus; North Atlantic; Northern bottlenose whale
• Online Access: https://doi.org/10.5061/dryad.v13m6

Although northern bottlenose whales were the most heavily hunted beaked whale, we have little information about this species in its remote habitat of the North Atlantic Ocean. Underwater anthropogenic noise and disruption of their natural habitat may be major threats, given the sensitivity of other beaked whales to such noise disturbance. We attached dataloggers to 13 northern bottlenose whales and compared their natural sounds and movements to those of one individual exposed to escalating levels of 1–2 kHz upsweep naval sonar signals. At a received sound pressure level (SPL) of 98 dB re 1 μPa, the whale turned to approach the sound source, but at a received SPL of 107 dB re 1 μPa, the whale began moving in an unusually straight course and then made a near 180° turn away from the source, and performed the longest and deepest dive (94 min, 2339 m) recorded for this species. Animal movement parameters differed significantly from baseline for more than 7 h until the tag fell off 33–36 km away. No clicks were emitted during the response period, indicating cessation of normal echolocation-based foraging. A sharp decline in both acoustic and visual detections of conspecifics after exposure suggests other whales in the area responded similarly. Though more data are needed, our results indicate high sensitivity of this species to acoustic disturbance, with consequent risk from marine industrialization and naval activity. ha13_176a_FineScaleTagData Time-series data of northern bottlenose whale subject in the study. ha13_176a_FineScaleMahalanobisDistance Mahalanobis distance time series from the whale subject. DiveParameters Measured dive parameters from tagged northern bottlenose whales NBW_visual_and_acoustic_detections Visual and acoustic detection of northern bottlenose whales before and after the experiment splData Modelled sound pressure levels of by distance and azimuth of the source location vesselTrack_Sverdrup2 GPRMC string of navigation data of the research vessel before and after the experiment