Loggerhead satellite tracking data from Rethymno, Crete, Greece

Samir Patel, Drexel University and Coonamessett Farm Foundation

Dataset credit

Samir Patel, Drexel University and Coonamessett Farm Foundation


Primary contact Samir Patel Coonamessett Farm Foundation, Inc.
Data entry Ei Fujioka Duke University



During the 2010 and 2011 nesting seasons in Rethymno, Crete, Greece, 21 satellite tags were deployed on post-reproductive loggerhead turtles, 20 females and 1 male. One tag failed, while the remaining 20 transmitted data during the migration period, with most tags continuing to transmit after the individual had reached a site of residency. The female turtles exhibited three distinct strategies, either migrating north into the Aegean Sea, southwest towards the Libyan or Tunisian coasts or remaining resident within the waters of Crete. Females migrated after completing nesting for the season starting in early July. The male turtle exhibited a different behavior migrating away from the nesting beach in mid-June and traveling into the Western Mediterranean basin.


The purpose of this study was to understand the at-sea behavior of loggerhead turtles in the Mediterranean Sea through the use of satellite telemetry.

Supplemental 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
oidunique ID
fidfeature ID
seriesturtle ID
obs_timeTime of location
obs_dateDate of location
lqLocation quality
latitudeLatitude of location
longitudeLongitude of location
source_namOriginal file source name
error_radiEstimated error radius
sp_tsnspecies ITIS TSN code
obs_countNumber of animals at location
sp_obsSpecies tagged
geomgeometry information (generated by OBIS-SEAMAP)
Marine mammals0
Sea turtles3,484
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2010-08-09
Date, End2012-03-31
Temporal prec.111111
Latitude31.31 - 38.91
Longitude1.40 - 34.57
Coord. prec.6 decimal digits
Data typeTelemetry location
TracklinesYES (ID: 1819)
Traveled (km)42,821
Travel hours62,825
Contr. throughSEAMAP_TO_SWOT
Sharing policy CC-BY-NC (Minimum)
Shared with SWOT
GBIF (via DOI)*
* Aggregated summary
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics