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Movement patterns of green turtles in Brazilian coastal waters described by satellite tracking and flipper tagging

Godley, BJ; Lima, EHSM; Åkesson, Susanne LU ; Broderick, AC; Glen, F; Godfrey, MH; Luschi, P and Hays, GC (2003) In Marine Ecology - Progress Series 253. p.279-288
Abstract
The movements of 8 green turtles Chelonia mydas in Brazilian coastal waters were tracked using transmitters linked to the Argos system for periods of between 1 and 197 d. These were the first tracking data gathered on juveniles of this species in this important foraging ground. Information was integrated with that collected over a decade using traditional flipper-tagging methods at the same site. Both satellite telemetry and flipper tagging suggested that turtles undertook 1 of 3 general patterns of behaviour: pronounced long range movements (>100 km), moderate range movements (< 100 km) or extended residence very close to the capture/release site. There seemed to be a general tendency for the turtles recaptured/tracked further... (More)
The movements of 8 green turtles Chelonia mydas in Brazilian coastal waters were tracked using transmitters linked to the Argos system for periods of between 1 and 197 d. These were the first tracking data gathered on juveniles of this species in this important foraging ground. Information was integrated with that collected over a decade using traditional flipper-tagging methods at the same site. Both satellite telemetry and flipper tagging suggested that turtles undertook 1 of 3 general patterns of behaviour: pronounced long range movements (>100 km), moderate range movements (< 100 km) or extended residence very close to the capture/release site. There seemed to be a general tendency for the turtles recaptured/tracked further afield to have been among the larger turtles captured. Satellite tracking of 5 turtles which moved from the release site showed that they moved through coastal waters; a factor which is likely to predispose migrating turtles to incidental capture as a result of the prevailing fishing methods in the region. The movements of the 3 turtles who travelled less than 100 km from the release site challenge previous ideas relating to home range in green turtles feeding in sea grass pastures. We hypothesise that there may be a fundamental difference in the pattern of habitat utilisation by larger green turtles depending on whether they are feeding on seagrass or macroalgae. Extended tracking of 2 small turtles which stayed near the release point showed that small juvenile turtles, whilst in residence in a particular feeding ground, can also exhibit high levels of site-fidelity with home ranges of the order of several square kilometers. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Marine Ecology - Progress Series
volume
253
pages
279 - 288
publisher
Inter-Research
external identifiers
  • wos:000183487200025
  • scopus:0038715906
ISSN
1616-1599
language
English
LU publication?
yes
id
8e08a313-08a0-4aa2-b9cf-ffc07580b315 (old id 137267)
alternative location
http://www.int-res.com/abstracts/meps/v253/p279-288/
date added to LUP
2007-06-25 11:52:10
date last changed
2018-05-29 10:50:24
@article{8e08a313-08a0-4aa2-b9cf-ffc07580b315,
  abstract     = {The movements of 8 green turtles Chelonia mydas in Brazilian coastal waters were tracked using transmitters linked to the Argos system for periods of between 1 and 197 d. These were the first tracking data gathered on juveniles of this species in this important foraging ground. Information was integrated with that collected over a decade using traditional flipper-tagging methods at the same site. Both satellite telemetry and flipper tagging suggested that turtles undertook 1 of 3 general patterns of behaviour: pronounced long range movements (&gt;100 km), moderate range movements (&lt; 100 km) or extended residence very close to the capture/release site. There seemed to be a general tendency for the turtles recaptured/tracked further afield to have been among the larger turtles captured. Satellite tracking of 5 turtles which moved from the release site showed that they moved through coastal waters; a factor which is likely to predispose migrating turtles to incidental capture as a result of the prevailing fishing methods in the region. The movements of the 3 turtles who travelled less than 100 km from the release site challenge previous ideas relating to home range in green turtles feeding in sea grass pastures. We hypothesise that there may be a fundamental difference in the pattern of habitat utilisation by larger green turtles depending on whether they are feeding on seagrass or macroalgae. Extended tracking of 2 small turtles which stayed near the release point showed that small juvenile turtles, whilst in residence in a particular feeding ground, can also exhibit high levels of site-fidelity with home ranges of the order of several square kilometers.},
  author       = {Godley, BJ and Lima, EHSM and Åkesson, Susanne and Broderick, AC and Glen, F and Godfrey, MH and Luschi, P and Hays, GC},
  issn         = {1616-1599},
  language     = {eng},
  pages        = {279--288},
  publisher    = {Inter-Research},
  series       = {Marine Ecology - Progress Series},
  title        = {Movement patterns of green turtles in Brazilian coastal waters described by satellite tracking and flipper tagging},
  volume       = {253},
  year         = {2003},
}