Geographic and temporal patterns in the acoustic detection of sperm whales Physeter macrocephalus in the central and western North Pacific Ocean
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Summary
DOI: https://doi.org/10.3354/esr00960
DescriptionThe easily identifiable, high-amplitude echolocation signals produced by sperm whales Physeter macrocephalus make the species ideal for long-term passive acoustic monitoring. Sperm whale signals were manually identified in the recordings from high-frequency acoustic recording packages monitoring 13 deep-water locations across the central and western North Pacific Ocean from 2005 to 2013, constituting the longest passive acoustic study of sperm whales to date. The species was detected at all of the sites, with the highest detection rate at Ladd Sea- mount (>18% of analyzed periods) and the lowest rates at equatorial sites (<1% of analyzed peri- ods). Generalized additive models and generalized estimating equations were used to produce explanatory models to assess temporal and geographic patterns. The model variables included diel phase, lunar day, day of the year, year, and site. The site-specific variability in detection rates was high across the North Pacific, but there were also common patterns, including a seasonal trend, with decreased detections during the summer or fall, and a diel trend, with increased detections at night. There appeared to be a seasonal movement pattern, with minimum detection rates occurring later in the year at more northerly sites. The nocturnal pattern was seen across all data sets but was not strong at equatorial locations. Although lunar cycles were important at many sites, there was no consistent trend at any spatial scale. Overall, this analysis confirms the broad distribution of sperm whales across the North Pacific and highlights the subtle temporal patterns in their acoustic activity, which may be related to shifts in animal behavior or movement.
Document Information
Document Type
Journal article
Document Format
Acrobat Portable Document Format
Publication Date
2019-06-27
Contact Information
Point of Contact
Karlina PB Merkens
karlina.merkens@noaa.gov
(808)725-5749
Metadata Contact
Karlina PB Merkens
karlina.merkens@noaa.gov
(808)725-5749
Extents
145.45° W,
-156° E,
28.6° N,
0.43333333333° S
2005 - 2013
Item Identification
Title: | Geographic and temporal patterns in the acoustic detection of sperm whales Physeter macrocephalus in the central and western North Pacific Ocean |
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Status: | Completed |
Publication Date: | 2019-06-27 |
Abstract: |
The easily identifiable, high-amplitude echolocation signals produced by sperm whales Physeter macrocephalus make the species ideal for long-term passive acoustic monitoring. Sperm whale signals were manually identified in the recordings from high-frequency acoustic recording packages monitoring 13 deep-water locations across the central and western North Pacific Ocean from 2005 to 2013, constituting the longest passive acoustic study of sperm whales to date. The species was detected at all of the sites, with the highest detection rate at Ladd Sea- mount (>18% of analyzed periods) and the lowest rates at equatorial sites (<1% of analyzed peri- ods). Generalized additive models and generalized estimating equations were used to produce explanatory models to assess temporal and geographic patterns. The model variables included diel phase, lunar day, day of the year, year, and site. The site-specific variability in detection rates was high across the North Pacific, but there were also common patterns, including a seasonal trend, with decreased detections during the summer or fall, and a diel trend, with increased detections at night. There appeared to be a seasonal movement pattern, with minimum detection rates occurring later in the year at more northerly sites. The nocturnal pattern was seen across all data sets but was not strong at equatorial locations. Although lunar cycles were important at many sites, there was no consistent trend at any spatial scale. Overall, this analysis confirms the broad distribution of sperm whales across the North Pacific and highlights the subtle temporal patterns in their acoustic activity, which may be related to shifts in animal behavior or movement. |
Other Citation Details: |
Merkens KP, Simonis AE, Oleson EM (2019) Geographic and temporal patterns in the acoustic detection of sperm whales Physeter macrocephalus in the central and western North Pacific Ocean. Endang Species Res 39:115-133. https://doi.org/10.3354/esr00960 |
DOI (Digital Object Identifier): | https://doi.org/10.3354/esr00960 |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
UNCONTROLLED | |
None | GAM |
None | GEE |
None | Generalized Additive Model |
None | Generalized Estimating Equation |
None | PAM |
None | Passive Acoustic Monitoring |
None | Physeter macrocephalus |
None | Sperm whale |
Spatial Keywords
Thesaurus | Keyword |
---|---|
UNCONTROLLED | |
None | Western North Pacific Ocean |
Physical Location
Organization: | Pacific Islands Fisheries Science Center |
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City: | Honolulu |
State/Province: | HI |
Country: | USA |
Document Information
Document Type: | Journal article |
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Format: | Acrobat Portable Document Format |
Status Code: | Published |
Support Roles
Author
Date Effective From: | 2016 |
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Date Effective To: | |
Contact (Person): | Merkens, Karlina PB |
Address: |
1845 Wasp Blvd. Honolulu, HI 96818 USA |
Email Address: | karlina.merkens@noaa.gov |
Phone: | (808)725-5749 |
Contact Instructions: |
|
Data Steward
Date Effective From: | 2016 |
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Date Effective To: | |
Contact (Person): | Merkens, Karlina PB |
Address: |
1845 Wasp Blvd. Honolulu, HI 96818 USA |
Email Address: | karlina.merkens@noaa.gov |
Phone: | (808)725-5749 |
Contact Instructions: |
|
Distributor
Date Effective From: | 2016 |
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Date Effective To: | |
Contact (Organization): | Pacific Islands Fisheries Science Center (PIFSC) |
Address: |
1845 Wasp Blvd. Honolulu, HI 96818 USA |
Email Address: | pifsc.info@noaa.gov |
Phone: | 808-725-5360 |
URL: | https://www.pifsc.noaa.gov |
Business Hours: | 8:00 a.m. - 4:30 p.m. |
Metadata Contact
Date Effective From: | 2016 |
---|---|
Date Effective To: | |
Contact (Person): | Merkens, Karlina PB |
Address: |
1845 Wasp Blvd. Honolulu, HI 96818 USA |
Email Address: | karlina.merkens@noaa.gov |
Phone: | (808)725-5749 |
Contact Instructions: |
|
Point of Contact
Date Effective From: | 2016 |
---|---|
Date Effective To: | |
Contact (Person): | Merkens, Karlina PB |
Address: |
1845 Wasp Blvd. Honolulu, HI 96818 USA |
Email Address: | karlina.merkens@noaa.gov |
Phone: | (808)725-5749 |
Contact Instructions: |
|
Extents
Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | 145.45 | |
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E° Bound: | -156 | |
N° Bound: | 28.6 | |
S° Bound: | 0.43333333333 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 2005 |
End: | 2013 |
Access Information
Security Class: | Unclassified |
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Data Access Policy: |
Requester will be asked to submit a request by email to Erin Oleson (erin.oleson@noaa.gov) or Karlina Merkens (karlina.merkens@noaa.gov) |
Data Access Procedure: |
Requester will be asked to submit a request by email to Erin Oleson (erin.oleson@noaa.gov) or Karlina Merkens (karlina.merkens@noaa.gov) |
Data Access Constraints: |
Requester will be asked to submit a request by email to Erin Oleson (erin.oleson@noaa.gov) or Karlina Merkens (karlina.merkens@noaa.gov) |
Data Use Constraints: |
Requester will be asked to submit a request by email to Erin Oleson (erin.oleson@noaa.gov) or Karlina Merkens (karlina.merkens@noaa.gov) |
Metadata Access Constraints: |
none |
Metadata Use Constraints: |
none |
URLs
URL 1
URL: | https://www.int-res.com/abstracts/esr/v39/p115-133/ |
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Data Quality
Quality Control Procedures Employed: |
Raw data (.hrp) are checked when initially copied from the drives to determine the total recording duration and assess errors in recording. Raw data are converted to .wav files that are checked during analyses of datasets. |
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HARP PRIA- Palmyra Atoll |
Data Set (DS) | Cross Reference |
HARP PRIA- Wake |
Data Set (DS) | Cross Reference |
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Data Set (DS) | Cross Reference |
HARP WPac- Tinian |
Catalog Details
Catalog Item ID: | 34921 |
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GUID: | gov.noaa.nmfs.inport:34921 |
Metadata Record Created By: | Karlina PB Merkens |
Metadata Record Created: | 2016-09-19 16:36+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2022-10-20 02:17+0000 |
Metadata Record Published: | 2019-07-17 |
Owner Org: | PIFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2019-07-17 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2020-07-17 |