Telemetry data obtained from Fastloc GPS/GSM tracking of 15 harbour seals (Phoca vitulina) and 12 grey seals (Halichoerus grypus), captured in Baie de Somme in 2019

Date 2022-08-04
Temporal extent 2019-05-23 -2020-03-24
Author(s) Vincent CecileORCID1
Affiliation(s) 1 : La Rochelle Université/CNRS, CEBC
DOI 10.17882/89715
Publisher SEANOE
Keyword(s) harbour seal, grey seal, phoca vitulina, halichoerus grypus, movement, GPS, tracking, at-sea distribution, marine mammal
Abstract

Tracking data of 15 harbour seals and 12 grey seals were obtained from the deployment of Fastloc GPS/GSM tags developed by the Sea Mammal Research Unit (UK). Full tag description is available at: http://www.smru.st-andrews.ac.uk/Instrumentation/GPSPhoneTag/. The tags include a wet-dry sensor from which haulout events are recorded, a pressure sensor providing detailed dive data, as well as a Fastloc GPS recording irregular locations when the seal is not underwater. Data is stored onboard and transmitted via the GSM network when the seal is in the reception range. The data provided here are the individual GPS locations of the seals fitted with these tags for an average duration of 106 days.

Licence CC-BY-NC-ND
Acknowledgements We thank the fieldwork participants for their work capturing seals for telemetry studies. These include participants from La Rochelle Université (CEBC, Pelagis), Picardie Nature, the Office Français de la Biodiversité (OFB) and ADN. All procedures performed in studies involving harbour and grey seals were in accordance with the ethical standards of the French Ministry of the Environment as seals were caught and instrumented under licenses delivered to Cecile Vincent by this Ministry. The project was funded by the OFB as part of the MSFD framework.
Sensor metadata

Data_type: Type of data provided (either GPS, Dive or Haulout)

Species: Seal species: Pv=Phoca vitulina (harbour seal), Hg = Halichoerus grypus (grey seal)

Capture_site: Location of the seal capture

Tag_number: Individual number of the seal fitted with a tag. One individual could be "numbered" differently on two consecutive field work if fitted with a new tag.

Seal_ID: Telemetry tag number

D_DATE: Date and time (UTC 0) of the recorded Fastloc GPS location

LAT: Latitude of the Fastloc GPS location (in decimal degrees)

LON: Longitude of the Fastloc GPS location (in decimal degrees)

V_MASK: SMRU filter of the locations. V_Mask=0 is plausible, V_Mask=20 is rejected due to unrealistic swimming speed (but may still be true when the seal swims in fast tidal currents!), V_Mask=-1 could not be tested due to the lack of previous/next location

Data
File Size Format Processing Access
Summary of individual seals captured and fitted with GPS/GSM tags (Baie de Somme, 2019) 3 KB CSV Quality controlled data Open access
Summary of individual seals captured and fitted with GPS/GSM tags (Baie de Somme, 2019) - Metadata 789 bytes CSV Quality controlled data Open access
GPS locations of grey and harbour seals tracked with GPS/GSM tags from Baie de Somme (France) in 2019-2020 14 MB CSV Quality controlled data Open access
GPS locations of grey and harbour seals tracked with GPS/GSM tags from Baie de Somme (France) in 2019-2020 - Metadata 778 bytes CSV Quality controlled data Open access
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How to cite 

Vincent Cecile (2022). Telemetry data obtained from Fastloc GPS/GSM tracking of 15 harbour seals (Phoca vitulina) and 12 grey seals (Halichoerus grypus), captured in Baie de Somme in 2019. SEANOE. https://doi.org/10.17882/89715