DOI 10.17882/81079 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.
Biological oceanography
harbour seal, Phoca vitulina, grey seal, Halichoerus grypus, telemetry, GPS, dive, behaviour, movement, marine mammal
57.2N, 54.7S, 0.5E, -8.3W
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
| File | Size | Format | Processing | Access | |
|---|---|---|---|---|---|
Dive data from grey/harbour seals tracked with GPS/GSM tags in Scotland in 2008-2014 - metadata | 2 Ko | CSV | Quality controlled data | ||
Dive data from grey seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008 | 83 Mo | CSV | Quality controlled data | ||
Dive data from harbour seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008-2011 | 52 Mo | CSV | Quality controlled data | ||
Dive data from harbour seals tracked with GPS/GSM tags from Islay (Scotland) in 2011-2014 | 48 Mo | CSV | Quality controlled data | ||
GPS locations of grey seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008 | 1 Mo | CSV | Quality controlled data | ||
GPS locations of grey/harbour seals tracked with GPS/GSM tags in Scotland in 2008-2014 - metadata | 787 octets | CSV | Quality controlled data | ||
GPS locations of harbour seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008-2011 | 3 Mo | CSV | Quality controlled data | ||
GPS locations of harbour seals tracked with GPS/GSM tags from Islay (Scotland) in 2011-2014 | 4 Mo | CSV | Quality controlled data | ||
Haulout data from grey/harbour seals tracked with GPS/GSM tags in Scotland in 2008-2014 - metadata | 946 octets | CSV | Quality controlled data | ||
Haulout data from grey seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008 | 107 Ko | CSV | Quality controlled data | ||
Haulout data from harbour seals tracked with GPS/GSM tags from the Firth of Tay (Scotland) in 2008-2011 | 111 Ko | CSV | Quality controlled data | ||
Haulout data from harbour seals tracked with GPS/GSM tags from Islay (Scotland) in 2011-2014 | 115 Ko | CSV | Quality controlled data | ||
Summary of individual seals captured and fitted with GPS/GSM tags (Scotland, 2008-2014): metadata | 640 octets | CSV | Quality controlled data | ||
Summary of individual seals captured and fitted with GPS/GSM tags (Scotland, 2008-2014) | 640 octets | CSV | Quality controlled data |
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