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Argos GPS Satellite Tracking Data for Three Large-Bodied Gull Species and Hybrids (Larus spp.) - Processed Data

Data Download [8.9MB] | Metadata | AK Science Portal | Project Site | Date Range: 06/09/2016 - 09/28/2018


This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 6 satellite transmitters attached to Glaucous-winged gulls on Middleton Island and 42 Argos-linked GPS satellite transmitters attached to three species of large-bodied gulls (genus Larus) and hybrids thereof, captured at landfills in southcentral, western and northern Alaska. The transmitters carried GPS receivers, so GPS tracking data represent the backbone of this data release. However, because the GPS locations were communicated through the Argos System, a time series of Argos (Doppler) tracking data also exists and is included. Four Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "GPS_filteredLocations" table contains one record for every GPS location obtained, accompanied by a binary flag that denotes an algorithm's plausibility check (based on a speed threshold of 35 m/s); 2) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record in both the GPS and Argos filtered-location tables also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 3) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 4) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

Author(s): Ramey, A. M.; Hatch, S. A.; Ahlstrom, C. A.; van Toor, M. L.; Woksepp, H.; Chandler, J. C.; Reed, J. A.; Reeves, A. B.; Waldenström, J.; Franklin, A. B.; Bonnedahl, J.; Gill, V. A.; Mulcahy, D. M.; Douglas, D. C.

Suggested Citation:
Ramey, A. M., Hatch, S. A., Ahlstrom, C. A., van Toor, M. L., Woksepp, H., Chandler, J. C., Reed, J. A., Reeves, A. B., Waldenström, J., Franklin, A. B., Bonnedahl, J., Gill, V. A., Mulcahy, D. M. and Douglas, D. C., 2020, Tracking data for three large-bodied gull species and hybrids (Larus spp.) (ver. 2.0, March 2021): U.S. Geological Survey data release, https://doi.org/10.5066/P9FZ4OJW.

Version History:
First release: June 2020
Revised: March 2021 (ver. 2.0)

Referenced Publication(s):

Ahlstrom, C. A., J. Bonnedahl, H. Woksepp, J. Hernandez, J. A. Reed, T. L. Tibbitts, B. Olsen, D. C. Douglas, and A. M. Ramey. 2019. Satellite tracking of gulls and genomic characterization of faecal bacteria reveals environmentally mediated acquisition and dispersal of antimicrobial resistant Escherichia coli on the Kenai Peninsula, Alaska. Molecular Ecology 28(10):2531-2545. doi:10.1111/mec.15101

Ahlstrom, C. A., M. L. van Toor, H. Woksepp, J. C. Chandler, J. A. Reed, A. B. Reeves, J. Waldenström, A. B. Franklin, D. C. Douglas, J. Bonnedahl, and A. M. Ramey. 2021. Evidence for continental-scale dispersal of antimicrobial resistant bacteria by landfill-foraging gulls. Science of the Total Environment 764(144551). doi:10.1016/j.scitotenv.2020.144551


DataID: 303 | doi:10.5066/P9FZ4OJW | Date Posted Online: 2020-06-26 | Last Updated: 2021-03-05 14:19:17

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