Description of a new beaked whale echolocation pulse type in the California Current

Griffiths, Emily T.; Keating, Jennifer Lyn; Barlow, Jay; Moore, Jeffrey E.

doi:10.1111/mms.12560

Cited by 10 publications

(19 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, three unknown beaked whale click types, BW37V, BW40, and BW43 have been recorded in Southern California. These signals may be attributed to Hubbs' (Mesoplodon carlhubbsi, BW37V and BW40) and Perrin's (Mesoplodon perrini, BW43) beaked whales (Baumann-Pickering et al, 2014;Griffiths et al, 2018). Inter-click-interval and mean click spectra were used as the primary discriminating features for species identification of each event.…”

Section: Beaked Whalesmentioning

confidence: 99%

Detections of Whale Vocalizations by Simultaneously Deployed Bottom-Moored and Deep-Water Mobile Autonomous Hydrophones

et al. 2020

Self Cite

View full text Add to dashboard Cite

Advances in mobile autonomous platforms for oceanographic sensing, including gliders and deep-water profiling floats, have provided new opportunities for passive acoustic monitoring (PAM) of cetaceans. However, there are few direct comparisons of these mobile autonomous systems to more traditional methods, such as stationary bottommoored recorders. Cross-platform comparisons are necessary to enable interpretation of results across historical and contemporary surveys that use different recorder types, and to identify potential biases introduced by the platform. Understanding tradeoffs across recording platforms informs best practices for future cetacean monitoring efforts. This study directly compares the PAM capabilities of a glider (Seaglider) and a deep-water profiling float (QUEphone) to a stationary seafloor system (High-frequency Acoustic Recording Package, or HARP) deployed simultaneously over a 2 week period in the Catalina Basin, California, United States. Two HARPs were deployed 4 km apart while a glider and deep-water float surveyed within 20 km of the HARPs. Acoustic recordings were analyzed for the presence of multiple cetacean species, including beaked whales, delphinids, and minke whales. Variation in acoustic occurrence at 1min (beaked whales only), hourly, and daily scales were examined. The number of minutes, hours, and days with beaked whale echolocation clicks were variable across recorders, likely due to differences in the noise floor of each recording system, the spatial distribution of the recorders, and the short detection radius of such a highfrequency, directional signal type. Delphinid whistles and clicks were prevalent across all recorders, and at levels that may have masked beaked whale vocalizations. The number and timing of hours and days with minke whale boing sounds were nearly identical across recorder types, as was expected given the relatively long propagation distance of boings. This comparison provides evidence that gliders and deep-water floats record cetaceans at similar detection rates to traditional stationary recorders at a single point.

show abstract

Section: Beaked Whalesmentioning

confidence: 99%

Detections of Whale Vocalizations by Simultaneously Deployed Bottom-Moored and Deep-Water Mobile Autonomous Hydrophones

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since we did not have a site farther offshore than Canyon, we may not have successfully captured the distribution of Cuvier's beaked whales offshore of Washington, possibly explaining the low level of Cuvier's beaked whale manually validated detections. This may also be true for the possible Hubbs' beaked whale (BW37V) click type since it was detected in even lower numbers offshore of Washington and previous detections of this click type along the U.S. west coast occurred in deeper water than site Canyon (Griffiths et al 2018;Simonis et al 2020, Table S1).…”

Section: Beaked Whalesmentioning

confidence: 82%

“…GAMs were not run for minke whales due to detections occurring on only two days no acoustic detections of Stejneger's beaked whales with concurrent visual confirmation. This is also true for the BW37V click type, which is hypothesized to be produced by Hubbs' beaked whale (Griffiths et al 2018), but for which there have been no concurrent visual confirmations to date. Therefore, our results for these species should be interpreted with caution.…”

Section: Discussionmentioning

confidence: 92%

“…Cuvier's and Stejneger's beaked whale FM pulses, as well as the BW37V signal type (presumed to be produced by Hubbs' beaked whale, Griffiths et al 2018), were detected automatically by running a Teager-Kaiser energy detector to identify all echolocation signals (Soldevilla et al 2008, Roch et al 2011) and then using an expert system to discriminate between delphinid clicks and beaked whale FM pulses (Roch et al 2011, Baumann-Pickering et al 2013a). Discrimination was based on detections within a 75 s segment and only segments with more than seven detections were used in further analysis.…”

Section: Call Detectionmentioning

confidence: 99%

“…Beaked whale echolocation signals are unique in their polycyclic structure and FM pulse upsweep. The peak frequency, spectral peaks, and inter-pulse interval of these signals vary among species and can be used for species discrimination (Johnson et al 2004, Zimmer et al 2005, Baumann-Pickering et al 2013a, 2013b, Griffiths et al 2018.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cetacean occurrence offshore of Washington from long-term passive acoustic monitoring

et al. 2021

View full text Add to dashboard Cite

A variety of cetacean species inhabit the productive waters offshore of Washington State, USA. Although the general presence of many of these species has been documented in this region, our understanding of fine-scale habitat use is limited. Here, passive acoustic monitoring was used to investigate the spatial and temporal distributions of ten cetacean species at three locations offshore of Washington. Between 2004 and 2013, a total of 2845 days of recordings were collected from sites on the continental shelf and slope, and in a submarine canyon. Acoustic presence was higher for all species at sites farther offshore. Detections were highest during the fall and winter for blue (Balaenoptera musculus), fin (B. physalus), and humpback whales (Megaptera novaeangliae), likely related to reproductive behavior, while minke whales (B. acutorostrata) were only detected on two days. Odontocetes showed temporal separation, with sperm whale (Physeter macrocephalus) detections highest in spring, Risso’s (Grampus griseus) and Pacific white-sided dolphins (Lagenorhynchus obliquidens) highest in summer, and Stejneger’s beaked whales (Mesoplodon stejnegeri), Cuvier’s beaked whales (Ziphius cavirostris), and the BW37V signal type highest in winter or spring. There was interannual variation in detections for most mysticete species, which may be linked to oceanographic conditions: blue and fin whale detections increased during 2007 and 2008, and fin and humpback whale detections increased in 2011. These results inform our understanding of cetacean behavior and habitat use in this region and may aid in the development of conservation strategies suited to the dynamic conditions that drive cetacean distribution.

show abstract

Beaked Whale Behavioral Responses to Navy Mid-Frequency Active Sonar

Henderson

2023

The Effects of Noise on Aquatic Life

View full text Add to dashboard Cite

Description of a new beaked whale echolocation pulse type in the California Current

Cited by 10 publications

References 23 publications

Detections of Whale Vocalizations by Simultaneously Deployed Bottom-Moored and Deep-Water Mobile Autonomous Hydrophones

Detections of Whale Vocalizations by Simultaneously Deployed Bottom-Moored and Deep-Water Mobile Autonomous Hydrophones

Cetacean occurrence offshore of Washington from long-term passive acoustic monitoring

Beaked Whale Behavioral Responses to Navy Mid-Frequency Active Sonar

Contact Info

Product

Resources

About