Detecting female precise natal philopatry in green turtles using assignment methods

Lee, Patricia L.M., Luschi, Paolo and Hays, Graeme C. 2007, Detecting female precise natal philopatry in green turtles using assignment methods, Molecular ecology, vol. 16, no. 1, pp. 61-74, doi: 10.1111/j.1365-294X.2006.03115.x.

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Title Detecting female precise natal philopatry in green turtles using assignment methods
Author(s) Lee, Patricia L.M.ORCID iD for Lee, Patricia L.M. orcid.org/0000-0002-8489-9206
Luschi, Paolo
Hays, Graeme C.ORCID iD for Hays, Graeme C. orcid.org/0000-0002-3314-8189
Journal name Molecular ecology
Volume number 16
Issue number 1
Start page 61
End page 74
Total pages 14
Publisher Wiley
Place of publication London, England
Publication date 2007-01
ISSN 0962-1083
1365-294X
Keyword(s) Aic
Chelonia mydas
FST
microsatellites
nest site fidelity
sex-biased gene flow
Summary It is well established that sea turtles return to natal rookeries to mate and lay their eggs, and that individual females are faithful to particular nesting sites within the rookery. Less certain is whether females are precisely returning to their natal beach. Attempts to demonstrate such precise natal philopatry with genetic data have had mixed success. Here we focused on the green turtles of three nesting sites in the Ascension Island rookery, separated by 5–15 km. Our approach differed from previous work in two key areas. First, we used male microsatellite data (five loci) reconstructed from samples collected from their offspring (N = 17) in addition to data for samples taken directly from females (N = 139). Second, we employed assignment methods in addition to the more traditional F-statistics. No significant genetic structure could be demonstrated with FST. However, when average assignment probabilities of females were examined, those for nesting populations in which they were sampled were indeed significantly higher than their probabilities for other populations (Mann–Whitney U-test: P < 0.001). Further evidence was provided by a significant result for the mAIC test (P < 0.001), supporting greater natal philopatry for females compared with males. The results suggest that female natal site fidelity was not sufficient for significant genetic differentiation among the nesting populations within the rookery, but detectable with assignment tests.
Language eng
DOI 10.1111/j.1365-294X.2006.03115.x
Field of Research 070499 Fisheries Sciences not elsewhere classified
060411 Population, Ecological and Evolutionary Genetics
060201 Behavioural Ecology
Socio Economic Objective 960808 Marine Flora, Fauna and Biodiversity
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30056218

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