Western Australian Loggerheads - Gnaraloo Bay and Gnaraloo Cape Farquhar 2015-2018
Gnaraloo Wilderness Foundation

Dataset credit

Data provider
Aubrey Strydom
Originating data center
Satellite Tracking and Analysis Tool (STAT)
Project partner
Gnaraloo Station Trust via the Gnaraloo Turtle Conservation Program 2008/18 and the Gnaraloo Feral Animal Control Program (GFACP)2008/15: Monitoring of the Gnaraloo sea turtle rookeries and feral animal control to protect the turtle rookeries: www.gnaraloo.org and Gnaraloo Turtle Conservation Program on Facebook.

Animal Pest Management Services, feral animal control at Gnaraloo for the GFACP 2008/15 to protect the turtle rookeries: www.animalpest.com.au

The Australian Government provided part of the cost of the Gnaraloo satellite turtle tracking project 2015/16 for the 10 trackers deployed that season through a Caring for Our Country grant: https://fieldcapture.ala.org.au/project/index/bcb6f263-8527-4093-ae59-7d80f6b79990#details

Brains Design: Creators of the Turtle Tracking App for smartphones: www.brainsdesign.com

Aub Strydom provided the two trackers deployed in the 2017-18 season.

Western Australian Department of Parks and Wildlife: Permits, advice, training, turtle tags, the turtle restraining box.


Primary contact Aub Strydom and Karen Hattingh Aubrey Strydom
Data entry Michael Coyne seaturtle.org


Aub Strydom and Karen Hattingh . 2019. Western Australian Loggerheads - Gnaraloo Bay and Gnaraloo Cape Farquhar 2015-2018. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/1344) on yyyy-mm-dd and originated from Satellite Tracking and Analysis Tool (STAT; http://www.seaturtle.org/tracking/index.shtml?project_id=1149).


Gnaraloo Loggerhead Turtle Satellite Tagging

Gnaraloo Station is a working pastoral station and wilderness tourism business located in a remote part of mainland Western Australia approximately 1,100 km north of Perth. The station abuts 65 km of pristine coastline at the southern end of the Ningaloo Reef and Ningaloo Marine Park.
The beaches at Gnaraloo Station provide nesting habitat for predominantly loggerhead (Caretta caretta), some green (Chelonia mydas) and possibly hawksbill (Eretmochelys imbricata) turtles generally from November to March each year. The Gnaraloo Turtle Conservation Program (GTCP) (www.gnaraloo.com/conservation www.gnaraloo.org Facebook) has conducted scientific monitoring of turtle activity at rookeries on the Gnaraloo coastline since 2008.
The nesting range of loggerhead turtles in Western Australia extends from Dirk Hartog Island in the south to the Muiron Islands in the north, with important rookeries in-between including Gnaraloo Bay, Gnaraloo Cape Farquhar, Janes Bay and Bungelup in the Ningaloo Marine Park.
With loggerhead turtles also being satellite tagged at Dirk Hartog Island and South Muiron Island during the season 2015/16 (1 July 2015 – 30 June 2016), the satellite tagging at Gnaraloo by the GTCP forms part of a broader co-ordinated program to understand inter-nesting movements, post-nesting migrations, and identify foraging grounds and potential threats across the turtles' entire nesting range in Western Australia.



Supplemental information

Visit STAT's project page for additional information.




Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downlodable online. Other attributes may be obtained upon provider's permission unless otherwise noted below.

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 in dataset provided

Attribute (table column)Description
project_idSTAT Project ID
prognumProgram number
tag_idPTT ID
datetime_utcDate and time in UTC
lcLocation class
iqQuality indicator
latitudeLatitude 1
longitudeLongitude 1
dir1Dir 1
nb_mesNumber of messages received
big_nb_mesdefinition not provided
best_levelBest signal strength in dB
pass_durationPass duration in seconds
nopcNumber Of Plausibility Checks successful (from 0-4)
calcul_freqCalculated frequency
altitudeAltitude used for location calculation
speciesSpecies name
sp_tsnITIS Taxonomic Serial Number
lc_filterParameters to location filtering
speed_filterParameters to speed filtering
distance_filterParameters to distance filtering
topo_filterParameters to topo filtering
time_filterParameters to time filtering
angle_filterParameters to angle filtering
life_stageLife stage of the animal
genderGender of the animal
wetdryWet or dry
wetdry_filterParameters to Wet or dry filterint
obs_datetimeDate and time (local time zone)
timezone_hTime difference from UTC
obs_countAnimal count (always 1)
Marine mammals0
Sea turtles23,193
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2015-12-06
Date, End2018-12-27
Temporal prec.111111
Latitude-26.51 - -10.70
Longitude111.92 - 141.72
Coord. prec.3 decimal digits
Data typeTelemetry location
TracklinesYES (ID: 1345)
Contr. throughSatellite Tracking and Analysis Tool
Sharing policy Permission required
Also availalbe from None
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics