Behavioral response of delphinids to sonar - supporting acoustic data

Oceanic delphinids around naval operations are regularly exposed to intense military sonar broadcast within the frequency range of their hearing. However, empirically measuring the impact of sonar on the behavior of highly social, free-ranging dolphins is challenging. Additionally, baseline variability or the frequency of vocal state-switching among social oceanic dolphins during undisturbed conditions is lacking, making it difficult to attribute changes in vocal behavior to anthropogenic disturbance. Using a network of drifting acoustic buoys in controlled exposure experiments, we investigated the effects of mid-frequency (3-4 kHz) active sonar (MFAS) on whistle production in short-beaked (Delphinus delphis delphis) and long-beaked common dolphins (Delphinus delphis bairdii) in southern California. Given the complexity of acoustic behavior exhibited by these group-living animals, we conducted our response analysis over varying temporal windows (10 min – 5 s) to describe both longer-ter..., , , # Behavioral response of delphinids to sonar - Supporting acoustic data

This data set contains information on detected whistle counts from acoustic recordings collected as part of a research project investigating the potential responses of two dolphin subspecies to simulated mid-frequency active sonar sounds. Whistles were detected using the Whistle and Moan Detector in the program Pamguard.

The associated zip file contains a single .csv for each CEE, with the filename indicating the CEE year and number (e.g., CEE2021_01_closestBuoyWhistles_1sec_20k.csv).

**Column headers:**

dateTime = date and time in local timezone (PST or PDT)

period = experimental period, either 'pre' for pre-exposure, 'exp' for exposure, and 'post' for post-exposure period

numWhistles = number of detected whistles that start within the 1 second specified in the dateTime column. NaNs indicate periods where no buoys were within the 1600 m distance threshold

durWhistles = sum of durations of the detected whis...