The relationship between abundance and genetic effective population size in elasmobranchs: an example from the globally threatened zebra shark Stegostoma fasciatum within its protected range

Dudgeon, C. L. and Ovenden, J. R. (2015) The relationship between abundance and genetic effective population size in elasmobranchs: an example from the globally threatened zebra shark Stegostoma fasciatum within its protected range. Conservation Genetics, 16 6: 1443-1454. doi:10.1007/s10592-015-0752-y


 
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Author Dudgeon, C. L.
Ovenden, J. R.
Title The relationship between abundance and genetic effective population size in elasmobranchs: an example from the globally threatened zebra shark Stegostoma fasciatum within its protected range
Formatted title
The relationship between abundance and genetic effective population size in elasmobranchs: an example from the globally threatened zebra shark Stegostoma fasciatum within its protected range
Journal name Conservation Genetics   Check publisher's open access policy
ISSN 1572-9737
1566-0621
Publication date 2015-12-01
Sub-type Article (original research)
DOI 10.1007/s10592-015-0752-y
Open Access Status Not Open Access
Volume 16
Issue 6
Start page 1443
End page 1454
Total pages 12
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2016
Language eng
Formatted abstract
Genetic effective population size (Ne) estimators are useful as applied conservation tools. Many elasmobranch (shark and ray) species are threatened at local and global scales, and tools to monitor these populations are greatly needed. This study investigates contemporary Ne and its relationship with census size (Nc) in a population of zebra sharks (Stegostoma fasciatum). Our Ne using the linkage disequilibrium method, 377 (95 % CI 274–584) was found to closely approximate the mark-recapture Nc for this population of mature sharks (458, 95 % CI 298–618), with an Ne/Nc ratio of 0.82 (SE = 0.33). Furthermore, we conducted a series of sensitivity analyses to examine how the numbers of samples and loci affect the precision and accuracy of the estimators. We demonstrate that for this species robust and precise estimates are obtainable with a minimum of 91 samples (approximately 20 % of the census population) and 10 microsatellite loci. These findings contribute important information to the greater body of Ne and Ne/Nc relationships in elasmobranchs and wildlife populations as well as provide important guidelines for implementing genetic monitoring in elasmobranch conservation efforts.
Keyword Leopard shark
Linkage disequilibrium
Microsatellites
Ne/Nc
Stegostoma fasciatum
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biomedical Sciences Publications
School of Veterinary Science Publications
 
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