Show simple item record

dc.contributor.authorFregosi, Selene
dc.contributor.authorHarris, Danielle
dc.contributor.authorMatsumoto, Haruyoshi
dc.contributor.authorMellinger, David K
dc.contributor.authorBarlow, Jay
dc.contributor.authorBaumann-Pickering, Simone
dc.contributor.authorKlinck, Holger
dc.coverage.spatialNorth Pacific Oceanen_US
dc.identifier.citationFregosi, S., Harris, D.V., Matsumoto, H., Mellinger, D.K., Barlow, J., Baumann-Pickering, S. and Klinck, H. (2020) Detections of Whale Vocalizations by Simultaneously Deployed Bottom-Moored and Deep-Water Mobile Autonomous Hydrophones. Frontiers in Marine Science, 7:721. DOI: 10.3389/fmars.2020.00721en_US
dc.description.abstractAdvances 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 bottom-moored 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 1-min (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. The spatiotemporal scale over which these single hydrophone systems record sounds is highly dependent on acoustic features of the sound source. Additionally, these mobile platforms provide improved spatial coverage which may be critical for species that produce calls that propagate only over short distances such as beaked whales.en_US
dc.rightsAttribution 4.0 International*
dc.subject.otherDeep-water floaten_US
dc.subject.otherMobile autonomous platformen_US
dc.subject.otherPassive acoustic monitoringen_US
dc.subject.otherBeaked whalesen_US
dc.subject.otherMinke whalesen_US
dc.titleDetections of whale vocalizations by simultaneously deployed bottom-moored and deep-water mobile autonomous hydrophones.en_US
dc.typeJournal Contributionen_US
dc.subject.instrumentTypepassive acoustic recordersen_US
dc.subject.dmProcessesData visualizationen_US
dc.subject.dmProcessesData acquisitionen_US
dc.subject.dmProcessesData analysisen_US
dc.subject.dmProcessesData deliveryen_US
dc.subject.dmProcessesData processingen_US
dc.bibliographicCitation.titleFrontiers in Marine Scienceen_US
dc.bibliographicCitation.issueArticle 721en_US
dc.description.eovMarine turtles, birds, mammals abundance and distributionen_US
dc.description.eovOcean sounden_US
dc.description.ebvSpecies distributionsen_US
dc.description.ebvSpecies abundancesen_US
dc.description.ecvmarine habitatsen_US
dc.description.sensorsWideband Intelligent Signal Processor and Recorder (WISPR)en_US
dc.description.sensorsHigh-frequency Acoustic Recording Packageen_US
dc.description.sensorspassive acoustic recordersen_US
dc.description.methodologyTypeReports with methodological relevanceen_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International