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Inferring contemporary and historical genetic connectivity from juveniles

Citation

Feutry, P and Berry, O and Kyne, PM and Pillans, RD and Hillary, RM and Grewe, PM and Marthick, JR and Johnson, G and Gunasekera, RM and Bax, NJ and Bravington, M, Inferring contemporary and historical genetic connectivity from juveniles, Molecular Ecology, 26, (2) pp. 444-456. ISSN 0962-1083 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 John Wiley & Sons Ltd.

DOI: doi:10.1111/mec.13929

Abstract

Measuring population connectivity is a critical task in conservation biology. While genetic markers can provide reliable long-term historical estimates of population connectivity, scientists are still limited in their ability to determine contemporary patterns of gene flow, the most practical time frame for management. Here, we tackled this issue by developing a new approach that only requires juvenile sampling at a single time period. To demonstrate the usefulness of our method, we used the Speartooth shark (Glyphis glyphis), a critically endangered species of river shark found only in tropical northern Australia and southern Papua New Guinea. Contemporary adult and juvenile shark movements, estimated with the spatial distribution of kin pairs across and within three river systems, was contrasted with historical long-term connectivity patterns, estimated from mitogenomes and genome-wide SNP data. We found strong support for river fidelity in juveniles with the within-cohort relationship analysis. Male breeding movements were highlighted with the cross-cohort relationship analysis, and female reproductive philopatry to the river systems was revealed by the mitogenomic analysis. We show that accounting for juvenile river fidelity and female philopatry is important in population structure analysis and that targeted sampling in nurseries and juvenile aggregations should be included in the genomic toolbox of threatened species management.

Item Details

Item Type:Refereed Article
Keywords:glyphis glyphis, conservation biology, kinship, marine dispersal, philopatry, population structure, threatened species
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Population Ecology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
Author:Marthick, JR (Mr James Marthick)
ID Code:113651
Year Published:2016
Deposited By:Menzies Institute for Medical Research
Deposited On:2017-01-11
Last Modified:2017-05-17
Downloads:0

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