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Hawksbill_green turtles Chagos Archipelago Western Indian Ocean
Hawksbill_green turtles Chagos Archipelago Western Indian Ocean
Citation
Hays GC, Mortimer JA, Rattray A, Shimada T, Esteban N. 2021. Hawksbill_green turtles Chagos Archipelago Western Indian Ocean. Movebank Data Repository. https://doi.org/10.5441/001/1.r72ph75f/1Abstract
Space use estimates can inform conservation management but relaying high-accuracy locations is often not straightforward. We used Fastloc-GPS Argos satellite tags with the innovation of additional data relay via a ground station (termed a “Mote”) to record high volumes (typically > 20 locations per individual per day) of high accuracy tracking data. Tags were attached in the Chagos Archipelago (Indian Ocean) in 2018-2019 to 23 immature turtles of two species for which there have been long-standing conservation concerns: 21 hawksbill turtles (Eretmochelys imbricata) and two green turtles (Chelonia mydas). Over long tracking durations (mean 227.6 days per individual), most turtles moved very little. For example, 17 of 21 hawksbill turtles remained continuously in the lagoon where they were equipped, with 95% and 50% Utilisation Distributions (UDs) averaging only 1.03 and 0.18 km2 respectively. Many individuals, and both species, could use the same small spaces, i.e., individuals did not maintain unique home ranges. However, three hawksbill turtles travelled 100s of km from the tagging site. Our results show that for some large marine vertebrates, even small protected areas of only a few km2 can encompass the movements of a large proportion of individuals over long periods. High accuracy tracking may likewise reveal the details of space use for many other animals that move little and/or use important focal areas and where previous low-accuracy tracking techniques have tended to overestimate space use.
Keywords
animal movement, animal tracking, Argos, Chelonia mydas, conservation biology, Eretmochelys imbricata, green sea turtle, hawksbill sea turtle, Indian ocean, marine protected areas, satellite telemetry, sea turtles
DOIs of related Publications
BibTex
@misc{001/1_r72ph75f/1, title = {Hawksbill_green turtles Chagos Archipelago Western Indian Ocean}, author = {Hays, GC and Mortimer, JA and Rattray, A and Shimada, T and Esteban, N}, year = {2021}, URL = {http://dx.doi.org/10.5441/001/1.r72ph75f/1}, doi = {doi:10.5441/001/1.r72ph75f/1}, publisher = {Movebank data repository} }
RIS
TY - DATA ID - doi:10.5441/001/1.r72ph75f/1 T1 - Hawksbill_green turtles Chagos Archipelago Western Indian Ocean AU - Hays, Graeme C. AU - Mortimer, Jeanne A. AU - Rattray, Alex AU - Shimada, Takahiro AU - Esteban, Nicole Y1 - 2021/07/21 KW - animal movement KW - animal tracking KW - Argos KW - Chelonia mydas KW - conservation biology KW - Eretmochelys imbricata KW - green sea turtle KW - hawksbill sea turtle KW - Indian ocean KW - marine protected areas KW - satellite telemetry KW - sea turtles KW - Chelonia mydas KW - Eretmochelys imbricata PB - Movebank data repository UR - http://dx.doi.org/10.5441/001/1.r72ph75f/1 DO - doi:10.5441/001/1.r72ph75f/1 ER -