Migration of green turtles (Chelonia mydas) from Australasian feeding grounds inferred from genetic analyses

Dethmers, Kiki E. M., Jensen, Michael P., FitzSimmons, Nancy N., Broderick, Damien, Limpus, Colin J. and Moritz, Craig (2010) Migration of green turtles (Chelonia mydas) from Australasian feeding grounds inferred from genetic analyses. Marine and Freshwater Research, 61 12: 1376-1387. doi:10.1071/MF10084


Author Dethmers, Kiki E. M.
Jensen, Michael P.
FitzSimmons, Nancy N.
Broderick, Damien
Limpus, Colin J.
Moritz, Craig
Title Migration of green turtles (Chelonia mydas) from Australasian feeding grounds inferred from genetic analyses
Formatted title
Migration of green turtles (Chelonia mydas) from Australasian feeding grounds inferred from genetic analyses
Journal name Marine and Freshwater Research   Check publisher's open access policy
ISSN 1323-1650
1448-6059
Publication date 2010-12
Sub-type Article (original research)
DOI 10.1071/MF10084
Volume 61
Issue 12
Start page 1376
End page 1387
Total pages 12
Place of publication Collingwood, Vic., Australia
Publisher CSIRO Publishing
Collection year 2011
Language eng
Formatted abstract
Coastal seagrass habitats in tropical and subtropical regions support aggregations of resident green turtles (Chelonia mydas) from several genetically distinct breeding populations. Migration of individuals to their respective dispersed breeding sites provides a complex pattern of migratory connectivity among nesting and feeding habitats of this species. An understanding of this pattern is important in regions where the persistence of populations is under threat from anthropogenic impacts. The present study uses mitochondrial DNA and mixed-stock analyses to assess the connectivity among seven feeding grounds across the north Australian coast and adjacent areas and 17 genetically distinct breeding populations from the Indo-Pacific region. It was hypothesised that large and geographically proximate breeding populations would dominate at nearby feeding grounds. As expected, each sampled feeding area appears to support multiple breeding populations, with two aggregations dominated by a local breeding population. Geographic distance between breeding and feeding habitat strongly influenced whether a breeding population contributed to a feeding ground (wi≤0.654); however, neither distance nor size of a breeding population was a good predictor of the extent of their contribution. The differential proportional contributions suggest the impact of anthropogenic mortality at feeding grounds should be assessed on a case-by-case basis.
© 2010 CSIRO.
Keyword Dispersal
Indo-Pacific
Migratory connectivity
Mixed-stock analysis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
 
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Created: Sun, 16 Jan 2011, 00:03:02 EST