Item Identification

Title: Comparison of High-frequency Echolocation Clicks (likely Kogia) in Two Simultaneously Collected Passive Acoustic Data Sets Sampled at 200 kHz and 320 kHz
Short Name: Hawaii K 23 HARP NBHF 200/320 Tech Memo
Status: Completed
Publication Date: 2018-09
Abstract:

Several species of odontocetes, including those in the genus Kogia, produce high- frequency (> 100 kHz) echolocation clicks. To compare the detection performance of High-frequency Acoustic Recording Packages (HARPs) for these signals, two instruments were deployed simultaneously on the same mooring off the Kona coast of the Island of Hawai’i. One instrument sampled at 200 kHz, while the other sampled at 320 kHz. The instrument sampling at 320 kHz recorded the full frequency content of high-frequency clicks and formed the basis for a comparison of relative click detection rates in the data sampled at 200 kHz, where clicks were aliased and truncated at the Nyquist frequency of 100 kHz. We compared a variety of detection metrics, including the number of high-frequency clicks, the number of encounters including high-frequency clicks, and the number of days with high-frequency click detections within each data set. This comparison revealed that the 200 kHz sampled data set contained 69% of the high-frequency click encounters relative to the 320 kHz sampled data set, representing 89% of days with high-frequency click detections. The vast majority of long-term passive acoustic data sets collected as part of the Pacific Islands Passive Acoustic Network are sampled at 200 kHz and this comparison suggests that measures of high-frequency click occurrence at the scale of days or longer are likely unbiased. Researchers should be cautious using 200 kHz sampled data to infer fine-scale (e.g. hourly) occurrence, as such measures are more likely to be biased by other factors that may influence high-frequency click detection on a similar scale.

DOI (Digital Object Identifier): https://doi.org/ 10.25923/jjss -er34

Keywords

Theme Keywords

Thesaurus Keyword
None High-frequency, narrow-band
None Kogia
None Passive acoustic monitoring

Spatial Keywords

Thesaurus Keyword
None Hawaii

Physical Location

Organization: Pacific Islands Fisheries Science Center
City: Honolulu
State/Province: HI
Country: USA

Document Information

Document Type: Technical Memorandum (Tech Mem
Format: Microsoft Word
Status Code: Final

Support Roles

Author

CC ID: 716239
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:

email

Data Steward

CC ID: 716242
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:

email

Distributor

CC ID: 716243
Date Effective From: 2016
Date Effective To:
Contact (Organization): Pacific Islands Fisheries Science Center (PIFSC)
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Phone: 808-725-5300
URL: http://www.pifsc.noaa.gov
Business Hours: 8:00 a.m. - 4:30 p.m.

Metadata Contact

CC ID: 716241
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:

email

Point of Contact

CC ID: 716240
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:

email

Extents

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 716237
W° Bound: -156.5
E° Bound: -155.5
N° Bound: 20
S° Bound: 19

Extent Group 1 / Time Frame 1

CC ID: 716236
Time Frame Type: Range
Start: 2016-07
End: 2016-08

Access Information

Security Class: Unclassified
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

Catalog Details

Catalog Item ID: 51517
Metadata Record Created By: Karlina PB Merkens
Metadata Record Created: 2018-02-08 13:22+0000
Metadata Record Last Modified By: Marie C Hill
Metadata Record Last Modified: 2019-07-17 16:25+0000
Metadata Record Published: 2019-07-17
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2020-07-17