An acoustic survey in the main Hawaiian Islands using drifting recorders

McCullough, Jennifer L. K.; Oleson, Erin M.; Barlow, Jay; Allen, Ann N.; Merkens, Karlina

doi:10.25923/rzzz-0v38

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An acoustic survey in the main Hawaiian Islands using drifting recorders

2021
By McCullough, Jennifer L. K. ; Oleson, Erin M. ; Barlow, Jay ; ...
Series: Pacific Islands Fisheries Science Center administrative report H ; 21-04

[PDF-1.56 MB]

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Personal Author:

McCullough, Jennifer L. K. ; Oleson, Erin M. ; Barlow, Jay ; Allen, Ann N. ; Merkens, Karlina

McCullough, Jennifer L. K. ; Oleson, Erin M. ; Barlow, Jay ; Allen, Ann N. ; Merkens, Karlina Less -
Corporate Authors:

United States. National Marine Fisheries Service. ; Southwest Region ; Pacific Islands Fisheries Science Center (U.S.)

United States. National Marine Fisheries Service. ; Southwest Region ; Pacific Islands Fisheries Science Center (U.S.) Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; PIFSC (Pacific Islands Fisheries Science Center) ; SWFSC (Southwest Fisheries Science Center) ; JIMAR (Joint Institute for Marine and Atmospheric Research)

NMFS (National Marine Fisheries Service) ; PIFSC (Pacific Islands Fisheries Science Center) ; SWFSC (Southwest Fisheries Science Center) ; JIMAR (Joint Institute for Marine and Atmospheric Research) Less -
Description:

During the 2017 Hawaiian Islands Cetacean and Ecosystem Assessment Survey (HICEAS), 19 drifting hydrophone recorders were deployed around the main Hawaiian Islands with the goal of improving detection of beaked whales and Kogia. These Drifting Acoustic Spar Buoy Recorders (DASBRs) contained a two-element vertical hydrophone array at 150 m depth, sampling at 288 kHz for 2 of every 10 min. Deployment locations were planned to cover a 50 nmi minimum convex polygon around the main Hawaiian Islands (MHI Stratum). In actuality, DASBRs drifted significantly within the MHI Stratum and up to 200 nmi beyond. Overall, the DASBRs collected data over a 96-day period and over 6,354 km of drifting track. Using the Click Detector Module within PAMGuard (version 2.00.11), cetacean echolocation pulses within 2-min periods were classified to species based on peak frequency and other pulse characteristics. We found frequency modulated (FM) pulses characteristic of Longman’s, Cuvier’s, Blainville’s, and Cross Seamount beaked whales (BWC) in 928 of the 2-min files, spread along the drift track of each DASBR. Additionally, two types of Kogia spp. echolocation clicks were detected with peak frequencies of 116 kHz and 123 kHz. To further improve detections of Kogia spp. echolocation clicks, custom MATLAB subroutines were used to re-analyze the recordings in greater detail resulting in 60 2-min detections versus the original 13 detected with these PAMGuard classifiers. Detections of sperm whales (in 2,809 2-min files) and echolocation from unidentified odontocetes (in 3,939 2-min files) were also identified. Acoustic detections of beaked whales and Kogia spp. were much more numerous than those from the towed array efforts during HICEAS 2017 and will enhance understanding of the distribution of these species in the main Hawaiian Islands.
Keywords:

[+]

Cetacea Hydrophone Marine Ecosystem Management Underwater Acoustics
Series:

Pacific Islands Fisheries Science Center administrative report H ; 21-04
DOI:

https://doi.org/10.25923/rzzz-0v38
Document Type:

Administrative Report
Place as Subject:

Hawaii ; North Pacific Ocean

Hawaii ; North Pacific Ocean Less -
Rights Information:

Public Domain
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:a28c5d24048318b09bee7608e8d92004b2d1d76cf1c97a755e62ea3ce796a121
Download URL:

https://repository.library.noaa.gov/view/noaa/29490/noaa_29490_DS1.pdf
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An acoustic survey in the main Hawaiian Islands using drifting recorders

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