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Finding the ‘lost years’ in green turtles: insights from ocean circulation models and genetic analysis

TitleFinding the ‘lost years’ in green turtles: insights from ocean circulation models and genetic analysis
Publication TypeJournal Article
Year of Publication2013
AuthorsPutman, NF, Naro-Maciel, E
JournalProceedings of the Royal Society B: Biological Sciences
Volume280
Pagination20131468
Date Publishedjul
ISSN0962-8452, 1471-2954
KeywordsChelonia mydas, Dispersal, distribution, marine turtles, ocean currents, population structure
Abstract

Organismal movement is an essential component of ecological processes and connectivity among ecosystems. However, estimating connectivity and identifying corridors of movement are challenging in oceanic organisms such as young turtles that disperse into the open sea and remain largely unobserved during a period known as ‘the lost years’. Using predictions of transport within an ocean circulation model and data from published genetic analysis, we present to our knowledge, the first basin-scale hypothesis of distribution and connectivity among major rookeries and foraging grounds ({FGs}) of green turtles (Chelonia mydas) during their ‘lost years’. Simulations indicate that transatlantic dispersal is likely to be common and that recurrent connectivity between the southwestern Indian Ocean and the South Atlantic is possible. The predicted distribution of pelagic juvenile turtles suggests that many ‘lost years hotspots’ are presently unstudied and located outside protected areas. These models, therefore, provide new information on possible dispersal pathways that link nesting beaches with {FGs}. These pathways may be of exceptional conservation concern owing to their importance for sea turtles during a critical developmental period.

URLhttp://rspb.royalsocietypublishing.org/content/280/1768/20131468
DOI10.1098/rspb.2013.1468