Olive ridley sea turtle tracking near Ghana 2009

Phil Allman, Florida Gulf Coast University

Dataset credit

Phil Allman, Florida Gulf Coast University


Primary contact Phil Allman Florida Gulf Coast University
Secondary contact Andrew Agyekumhene Wildlife Division of Forestry Commission
Data entry Ei Fujioka Duke University



Marine turtles have complex life cycles that include long-distance movements across coastal and pelagic habitats to access juvenile nurseries, foraging grounds, and eventually breeding grounds. Understanding these movement patterns is important for knowing habitat requirements and potential mortality risks for populations on a local, regional, and global scale. This knowledge is critically needed to inform resource managers and adopt best management practices for all populations. Although we are starting to understand the migration patterns for some species, there is a paucity of information regarding movement patterns of sea turtles that utilize nesting grounds in West Africa. We installed satellite tags on four female olive ridley sea turtles near the end of nesting season in Ghana. The purpose of this study was to determine their movement away from the nesting grounds. Two individuals remained in coastal waters within the Gulf of Guinea, whereas two individuals swam southerly and entered pelagic habitats of the eastern Atlantic Ocean. Even with the small sample size, these data suggest individuals disperse to different habitats near the end of nesting season.


The purpose of this study was to describe the dispersal pattern of adult female olive ridley sea turtles at the end of nesting season in Ghana, West Africa.

Supplemental information



Allman, P., M. Coyne and A. K. Amah. 2010. Personal communication. SWOT Report—The State of the World’s Sea Turtles, vol. 5.



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 number (generated by OBIS-SEAMAP)
seriesTag ID
obs_dateDate of the location
obs_timeTime of the location
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
sp_obsSpecies name recorded
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
obs_countNumber of animal. Always 1
geomGeometry field added by OBIS-SEAMAP
Marine mammals0
Sea turtles371
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2009-12-23
Date, End2010-01-23
Temporal prec.111110
Latitude-0.95 - 6.04
Longitude-0.14 - 3.63
Coord. prec.3 decimal digits
Data typeTelemetry location
TracklinesYES (ID: 1814)
Traveled (km)4,823
Travel hours1,371
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