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Testing the navigational abilities of ocean migrants: displacement experiments on green sea turtles (Chelonia mydas)

Luschi, P; Åkesson, Susanne LU ; Broderick, A C; Glen, F; Godley, B J; Papi, F and Hays, G C (2001) In Behavioral Ecology and Sociobiology 50(6). p.528-534
Abstract
Like many animals migrating through the oceans, sea turtles face difficult navigational tasks when they have to reach distant, specific sites. The paradigmatic case of Brazilian green turtles (Chelonia mydas), which nest on the tiny Ascension Island in the middle of the Atlantic Ocean, has often been the subject of hypotheses concerning their navigational mechanisms. To investigate their nature, we displaced 18 females from Ascension and tracked them by satellite after release from eight different points in the ocean, 60-450 km away from the island. Four turtles moved to Brazil soon after the release, 4 moved in various directions before heading to Brazil, and 10 reached the island. All the successful trips, bar 1, were winding but ended... (More)
Like many animals migrating through the oceans, sea turtles face difficult navigational tasks when they have to reach distant, specific sites. The paradigmatic case of Brazilian green turtles (Chelonia mydas), which nest on the tiny Ascension Island in the middle of the Atlantic Ocean, has often been the subject of hypotheses concerning their navigational mechanisms. To investigate their nature, we displaced 18 females from Ascension and tracked them by satellite after release from eight different points in the ocean, 60-450 km away from the island. Four turtles moved to Brazil soon after the release, 4 moved in various directions before heading to Brazil, and 10 reached the island. All the successful trips, bar 1, were winding but ended with a final straight segment of variable length, as if the turtles were searching for a sensory contact with the island which they obtained at various distances. The approach to Ascension mostly occurred from the direction opposite to the trade wind, suggesting a navigational role of wind-borne information originating from the island. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Behavioral Ecology and Sociobiology
volume
50
issue
6
pages
528 - 534
publisher
Springer
external identifiers
  • scopus:0035185581
ISSN
1432-0762
DOI
10.1007/s002650100396
language
English
LU publication?
yes
id
25e2db03-1411-4e5f-883e-767081874ba3 (old id 145678)
date added to LUP
2007-06-26 09:52:18
date last changed
2018-06-03 03:29:10
@article{25e2db03-1411-4e5f-883e-767081874ba3,
  abstract     = {Like many animals migrating through the oceans, sea turtles face difficult navigational tasks when they have to reach distant, specific sites. The paradigmatic case of Brazilian green turtles (Chelonia mydas), which nest on the tiny Ascension Island in the middle of the Atlantic Ocean, has often been the subject of hypotheses concerning their navigational mechanisms. To investigate their nature, we displaced 18 females from Ascension and tracked them by satellite after release from eight different points in the ocean, 60-450 km away from the island. Four turtles moved to Brazil soon after the release, 4 moved in various directions before heading to Brazil, and 10 reached the island. All the successful trips, bar 1, were winding but ended with a final straight segment of variable length, as if the turtles were searching for a sensory contact with the island which they obtained at various distances. The approach to Ascension mostly occurred from the direction opposite to the trade wind, suggesting a navigational role of wind-borne information originating from the island.},
  author       = {Luschi, P and Åkesson, Susanne and Broderick, A C and Glen, F and Godley, B J and Papi, F and Hays, G C},
  issn         = {1432-0762},
  language     = {eng},
  number       = {6},
  pages        = {528--534},
  publisher    = {Springer},
  series       = {Behavioral Ecology and Sociobiology},
  title        = {Testing the navigational abilities of ocean migrants: displacement experiments on green sea turtles (Chelonia mydas)},
  url          = {http://dx.doi.org/10.1007/s002650100396},
  volume       = {50},
  year         = {2001},
}