Telemetry data obtained from Fastloc GPS/GSM tracking of 18 harbour seals (Phoca vitulina) and 9 grey seals (Halichoerus grypus), captured in St Andrews (Firth of Tay) and Islay (Scotland), from 2008 to 2014

Date 2021
Temporal extent 2008 -2014
Author(s) Russell DebbieORCID1
Affiliation(s) 1 : Sea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Fife, KY16 8LB
DOI 10.17882/81079
Publisher SEANOE
Note The dataset consists of: (1) a table summarizing the individual characteristics of captured seals (2) a metadata table for the above parameters (3) three datasets of all individual seal dives recorded by the Fastloc GPS/GSM tags developed at the Sea Mammal Research Unit (SMRU, UK). Each dataset is provided for a separate species (harbour seals Pv or grey seals Hg) and one study site (Firth of Tay = FoT and Islay) (4) three metadata files describing the dive parameters for each study site and species (5) three datasets of all individual seal GPS locations recorded by SMRU’s Fastloc GPS/GSM tags. Each dataset is provided for a separate species and one study site (6) three metadata files describing the GPS location parameters or each study site and species (7) three datasets of all individual seal haulouts recorded by SMRU’s Fastloc GPS/GSM tags. Each dataset is provided for a separate species and one study site (8) three metadata files describing the haulout parameters or each study site and species
Keyword(s) harbour seal, Phoca vitulina, grey seal, Halichoerus grypus, telemetry, GPS, dive, behaviour, movement, marine mammal
Abstract

Tracking data of 18 harbour seals and 9 grey seals were obtained from the deployment of Fastloc GPS/GSM tags developed by the Sea Mammal Research Unit Instrumentation Group (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, dive parameters and haulouts of the seals fitted with these tags.

Licence CC-BY-NC-ND
Acknowledgements Tags and their deployment were funded by the Natural Environment Research Council, Marine Scotland and NatureScot (previously known as Scottish Natural Heritage). All capture and handling protocols were carried out under UK Home Office licenses #60/2589, #60/3303 and #60/4009 in accordance with the Animals Scientific Procedures Act 1986, and under licence from Marine Scotland. All appropriate permissions with regard to designated sites, with any necessary mitigation measures in place, were obtained from the relevant authority.
Sensor metadata

GPS location data:

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, V_Mask=-1 could not be tested due to the lack of previous/next location

 

Dive data:

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

Seal_ID: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.

Tag_number:Telemetry tag number

DE_DATE:Date and time of the Dive End

SURF_DUR:Post-dive surface duration (seconds)

DIVE_DUR:Dive duration (seconds)

PERCENT_AREA:Maximum depth (meters)

MAX_DEP:Percentage of the "maximum dive trapezoid" covered by the dive, used for the calculation of the Time Allocation at Depth index (TAD; cf. Fedak et al., 2001; https://doi.org/10.1111/j.1748-7692.2001.tb00982.x).

D1:Intermediate depth point 1 (metres) in the dive, at time = 10% of the total dive duration

D2:Intermediate depth point 2 (metres) in the dive, at time = 20% of the total dive duration

D3:Intermediate depth point 3 (metres) in the dive, at time = 30% of the total dive duration

D4:Intermediate depth point 4 (metres) in the dive, at time = 40% of the total dive duration

D5:Intermediate depth point 5 (metres) in the dive, at time = 50% of the total dive duration

D6:Intermediate depth point 6 (metres) in the dive, at time = 60% of the total dive duration

D7:Intermediate depth point 7 (metres) in the dive, at time = 70% of the total dive duration

D8:Intermediate depth point 8 (metres) in the dive, at time = 80% of the total dive duration

D9:Intermediate depth point 9 (metres) in the dive, at time = 90% of the total dive duration

LAT:Estimated latitude of the end of the dive (interpolated between previous and next "real" Fastloc GPS location recorded by the tag)

LON:Estimated longitude of the end of the dive (interpolated between previous and next "real" Fastloc GPS location recorded by the tag)

 

Haulout data:

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, V_Mask=-1 could not be tested due to the lack of previous/next location

Data
File Size Format Processing Access
Dive data from grey/harbour seals tracked with GPS/GSM tags in Scotland in 2008-2014 - metadata 2 KB CSV Quality controlled data Open access
Dive data from grey seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008 83 MB CSV Quality controlled data Open access
Dive data from harbour seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008-2011 52 MB CSV Quality controlled data Open access
Dive data from harbour seals tracked with GPS/GSM tags from Islay (Scotland) in 2011-2014 48 MB CSV Quality controlled data Open access
GPS locations of grey seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008 1 MB CSV Quality controlled data Open access
GPS locations of grey/harbour seals tracked with GPS/GSM tags in Scotland in 2008-2014 - metadata 787 bytes CSV Quality controlled data Open access
GPS locations of harbour seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008-2011 3 MB CSV Quality controlled data Open access
GPS locations of harbour seals tracked with GPS/GSM tags from Islay (Scotland) in 2011-2014 4 MB CSV Quality controlled data Open access
Haulout data from grey/harbour seals tracked with GPS/GSM tags in Scotland in 2008-2014 - metadata 946 bytes CSV Quality controlled data Open access
Haulout data from grey seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008 107 KB CSV Quality controlled data Open access
Haulout data from harbour seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008-2011 111 KB CSV Quality controlled data Open access
Haulout data from harbour seals tracked with GPS/GSM tags from Islay (Scotland) in 2011-2014 115 KB CSV Quality controlled data Open access
Summary of individual seals captured and fitted with GPS/GSM tags (Scotland, 2008-2014): metadata 640 bytes CSV Quality controlled data Open access
Summary of individual seals captured and fitted with GPS/GSM tags (Scotland, 2008-2014) 640 bytes CSV Quality controlled data Open access
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How to cite 

Russell Debbie (2021). Telemetry data obtained from Fastloc GPS/GSM tracking of 18 harbour seals (Phoca vitulina) and 9 grey seals (Halichoerus grypus), captured in St Andrews (Firth of Tay) and Islay (Scotland), from 2008 to 2014. SEANOE. https://doi.org/10.17882/81079