Bonaire Turtle Tracking 2012

Sea Turtle Conservation Bonaire

Dataset credit

Data provider
Originating data center
Satellite Tracking and Analysis Tool (STAT)
Project sponsor or sponsor description
Valley Foundation


Primary contact Mabel Nava Sea Turtle Conservation Bonaire
Data entry Michael Coyne



Anneke Nests at Playa Chikitu, Leaves with Transmitter

Just after sunset on Sunday night, a massive sea turtle weighing approximately 150 kilograms slowly emerged from the sea and crawled up the beach at Playa Chikitu, Washington Slagbaai National Park. This sea turtle, a Green species, took several hours to find her spot, dig a nest, and lay her fourth clutch of the season.

Before returning to the water, Sea Turtle Conservation Bonaire (STCB) staff and volunteers intercepted the turtle, named Anneke, and constrained her in a special wooden box where flipper tags and a satellite transmitter were successfully attached following standard protocols. Anneke was released at midnight and smoothly departed into the sea.

Throughout their adult lives sea turtles migrate between two homes: their foraging grounds and breeding grounds. This navigational acheivement is extraordinary considering the large distance between many turtles “two homesâ€. For female turtles this often means returning and crawling the same beach where they themselves hatched decades earlier.

Anneke’s home foraging grounds are currently unknown, but should soon be discovered by tracking her migration route. Identifying these routes and Bonaire’s turtles home foraging grounds provides valuable information to help protect these endangered species.

This year STCB invites everyone on Bonaire to follow Anneke on her journey and have launched the Great Migration Game. Make one of the closest predictions of where Anneke is going and win a Blackberry with a year of service along with other cool prizes. To participate go to, click on the Great Migration Game link and follow the instructions.

While sea turtles have a fairly regular nesting schedule, just like people, each turtle acts differently and with every turtle there are opportunities to learn the different nesting behaviors of these incredible animals.

Anneke, measuring an impressive one meter straight carapace length was unusual. She showed up on Thursday, Friday and Saturday night to check out the beach from the surf, but without crawling or nesting. Finally, Sunday, to the delight of the STCB team who had expected her on Friday based on her pattern of previous nests, Anneke crawled the beach and after four or five attempts to make her body pit she found the right spot to successfully deposit her clutch of approximately 100 eggs.

Because this was Anneke’s fourth nest of this season, she may soon leave for her home foraging grounds, but it is possible that she will return to lay a fifth nest before departing from her nesting area.

Anneke is the first and only turtle to be tracked from Bonaire during the 2012 nesting season and the fourth Green sea turtle ever fitted with a transmitter on Bonaire.

Tracking of this Green sea turtle is made possible by a full sponsorship provided by the Valley Foundation.

Sea Turtle Conservation Bonaire is a non-governmental research and conservation organization that has been protecting sea turtles since 1991, member of the Wider Caribbean Sea Turtle Conservation Network (WIDECAST) and a project partner of the Dutch Caribbean Nature Alliance (DCNA).
‘Our mission is to ensure the protection and recovery of the sea turtle populations throughout their range’



Supplemental information

Visit STAT's project page for additional information.




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

Attributes in dataset

Attribute (table column)Description
prognumProgram number
tag_idPTT ID
lcLocation class
iqQuality indicator
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
project_idSTAT Project ID
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
Marine mammals0
Sea turtles316
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2012-10-10
Date, End2012-11-11
Temporal prec.111111
Latitude14.53 - 21.28
Longitude-78.79 - -68.90
Coord. prec.3 decimal digits
Data typeTelemetry location
TracklinesYES (ID: 943)
Traveled (km)2,032
Travel hours774
Contr. throughSatellite Tracking and Analysis Tool
Sharing policy Permission required
Shared with SWOT
GBIF (via DOI)*
* Aggregated summary
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics