Detailed movements of green sea turtles Roberta and Zyanya, from the nesting beach in
Lechuguillas,Mexico to the foraging grounds off the Florida Keys.
Data collected via satellite telemetry using The ARGOS Satellite System.
Roberta
Distance Traveled: 1429.65 km
Mean Travel Speed: 0.362 km/hr
Days in Transit: 61 days
Last signal: April 18, 2001
Zyanya
Distance Traveled: 984.55 km
Mean Travel Speed: 0.631 km/hr
Days in Transit: 73 days
Last signal: March 22, 2001
Estimated home range of the green sea turtle Roberta, as calculated using ArcView’s
Extension, Animal Movement. This view represents home range as compared to land masses
that comprise the Florida Keys and the Marquesas Keys. Total area of habitat utilization of this
feeding ground by Roberta is approximately 2,745.63 sq km.
Estimated home range of Roberta shown in overlay of benthic habitat.
The habitat is primarily seagrass, 72.43% of categorized substrate covered by
patchy or continuous seagrass beds.
Estimated home range of the green sea turtle Zyanya, as calculated using ArcView’s
Extension, Animal Movement. This view represents home range as compared to land masses
that comprise the Florida Keys and the Marquesas Keys. Total area of habitat utilization of this
feeding ground by Roberta is approximately 336.317 sq km.
Estimated home range of Zyanya shown in overlay of benthic habitat.
The habitat is primarily seagrass, 84.55% of categorized substrate covered by
patchy or continuous seagrass beds.
Roberta’s estimated home range utilization distribution, calculated using The Kernel Home Range
Function of ArcView’s Animal Movement. Roberta’s defined home range is the area enclosed
by the 95% polygon and is shaded dark green. The animals core area is located within the
50% utilization distribution and is shaded a lighter green.