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Island-finding ability of marine turtles

Författare:
Publiceringsår: 2003
Språk: Engelska
Sidor: S5-S7
Publikation/Tidskrift/Serie: Proceedings / Royal Society. Biological sciences
Volym: 270
Nummer: Suppl. 1, Aug 7
Dokumenttyp: Artikel
Förlag: The Royal Society

Sammanfattning

Green turtles (Chelonia mydas) swim from foraging grounds along the Brazilian coast to Ascension Island to nest, over 2200 km distant in the middle of the equatorial Atlantic. To test the hypothesis that turtles use wind-borne cues to locate Ascension Island we found turtles that had just completed nesting and then moved three individuals 50 km northwest (downwind) of the island and three individuals 50 km southeast (upwind). Their subsequent movements were tracked by satellite. Turtles released downwind returned to Ascension Island within 1, 2 and 4 days, respectively. By contrast, those released upwind had far more difficulty in relocating Ascension Island, two eventually returning after 10 and 27 days and the third heading back to Brazil after failing to find its way back to the island. These findings strongly support the hypothesis that wind-borne cues are used by turtles to locate Ascension Island.

Disputation

Nyckelord

  • Biology and Life Sciences

Övriga

Published
Yes
  • ISSN: 0962-8452

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