Bryde's whale localized acoustic detections off Kauai 2013-2022
Regina A. Guazzo, Naval Information Warfare Center Pacific
Dataset credit
Naval Information Warfare Center Pacific
|
Contacts
Role | Name | Organization | |
Primary contact |
Regina Guazzo |
Naval Information Warfare Center Pacific |
 |
Data entry |
Ei Fujioka |
Duke University |
 |
|
Citation
Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography. 22(2):104-115.
|
Abstract
A unique acoustic call was identified and attributed to the Bryde’s whale in the central North Pacific in 2015, but little is known about the distribution, calling behavior, or swimming behavior of Bryde’s whales in the region. Acoustic detections attributed to Bryde’s whales were used to localize and track individual whales on the U.S. Pacific Missile Range Facility (PMRF) in Kaua‘i, Hawai‘i. This study included 150 acoustically derived tracks from recordings spanning the years 2011–2022 with recording effort in nearly every month. Bryde’s whale movement was examined relative to calendar year, day of year, hour of day, wind speed, and acoustic calling rate. Hidden Markov models were used to identify two kinematic states (slower, less directional movement and faster, more directional movement). The findings indicate that Bryde’s whales were more likely to travel in a faster and more directional state during the daytime than at night and between May and August when compared to other times of year. The along-track acoustic cue rate was examined for 118 tracks, and the findings indicate a possible lengthening of the median inter-call interval over the duration of the study period. These results are an important first step in understanding more about behavior in Bryde’s whales, a relatively understudied species.
|
Purpose
N/A
|
Supplemental information
47 stationary hydrophones were used to detect. The monitoring effort for the 47 hydrophones were same. The locations of the hydrophones are rounded and approximate.
|
References
|
Attributes
Overview
This section explains attributes included in the original dataset.
OBIS-SEAMAP restricts the attributes available to the public to
date/time, lat/lon and species names/counts only.
Should you need other attributes described here, you are encouraged
to contact the data provider.
Attributes described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".
Attributes in dataset
Attribute (table column) | Description |
oid | Unique ID number (generated by OBIS-SEAMAP) |
species | Species name |
sp_tsn | Taxonomic Serial Number added by OBIS-SEAMAP |
obs_count | Number of animals (always 1) |
latitude | Latitude in decimal degrees |
longitude | Longitude in decimal degrees |
juliantimeofemission | Date/time of emission in Julian time, Matlab format UTC |
datestringtimeofemission | String format of date/time of emission UTC |
tracknum | Track number |
datetimeofemission | Date/time of emission UTC |
geom | Geometry field added by OBIS-SEAMAP |
|
|
OBIS-SEAMAP ID | 2284 |
Seabirds | 0 |
Marine mammals | 5,974 |
Sea turtles | 0 |
Rays and sharks | 0 |
Other species | 0 |
Non spatial | 0 |
Non species | 0 |
Total | 5,974 |
Date, Begin | 2013-08-06 |
Date, End | 2022-06-07 |
Temporal prec. | 111111 |
Latitude | 22.28 - 22.80 |
Longitude | -160.05 - -159.85 |
Coord. prec. | 6 decimal digits |
Platform | Station |
Data type | Acoustic - presence |
Effort | YES (ID: 2285) |
if ($show_effort_stat) {
?>
Traveled (km) | 0 |
Travel hours | 1,652,884 |
}
if ($sources != null and $sources != "" and $dataset_id != 427) { // Do not show ESAS
?>
Contr. through | |
}
?>
Registered | 2024-03-06 |
Updated | 2024-04-03 |
Status | Published |
Sharing policy |
CC-BY-NC (All) |
Shared with |
OBIS
GBIF (via DOI) |
See metadata in static HTML |
See metadata in FGDC XML |
See download history / statistics |
|