Skip to main content

Research Repository

Advanced Search

Genetic Connectivity of Seamount Populations of Bluenose Warehou (Hyperoglyphe antarctica)

Heyworth, Stephanie M.; Bell, James B.; Wade, Christopher M.; Cavalcante, Geórgenes; Robinson, Nicholas; Young, Emma; Glass, James; Feary, David A.

Genetic Connectivity of Seamount Populations of Bluenose Warehou (Hyperoglyphe antarctica) Thumbnail


Authors

Stephanie M. Heyworth

James B. Bell

Geórgenes Cavalcante

Nicholas Robinson

Emma Young

James Glass

David A. Feary



Abstract

Quantifying the level of population connectivity within and between geographically separated single-species deep-water fisheries stocks will be vital for designing effective management plans to preserve such populations. Despite this, stock structure in many fisheries is still poorly described and, at best, subject to precautionary management. Here we use rapidly evolving mitochondrial genes and microsatellite markers to investigate population connectivity patterns in commercially targeted Hyperoglyphe antarctica populations between four seamounts within the Tristan da Cunha Exclusive Economic Zone (EEZ). We find little evidence of population genetic structure between fished populations, with both mtDNA and microsatellite markers showing that there is low genetic population diversity (reflecting substantial gene flow) across the four seamounts. We also find little genetic differentiation between H. antarctica across the wider Southern Hemisphere. Such results support the role for coordinated management of all four populations across the seamounts, and potentially including stocks associated with Australia and New Zealand, with expansion of the fishery clearly having the potential to substantially impact the source of recruits and therefore wider population sustainability.

Citation

Heyworth, S. M., Bell, J. B., Wade, C. M., Cavalcante, G., Robinson, N., Young, E., Glass, J., & Feary, D. A. (2021). Genetic Connectivity of Seamount Populations of Bluenose Warehou (Hyperoglyphe antarctica). Frontiers in Marine Science, 8, Article 640504. https://doi.org/10.3389/fmars.2021.640504

Journal Article Type Article
Acceptance Date Jul 27, 2021
Online Publication Date Sep 9, 2021
Publication Date Sep 9, 2021
Deposit Date Aug 8, 2022
Publicly Available Date Aug 9, 2022
Journal Frontiers in Marine Science
Electronic ISSN 2296-7745
Publisher Frontiers Media
Peer Reviewed Peer Reviewed
Volume 8
Article Number 640504
DOI https://doi.org/10.3389/fmars.2021.640504
Keywords Ocean Engineering; Water Science and Technology; Aquatic Science; Global and Planetary Change; Oceanography
Public URL https://nottingham-repository.worktribe.com/output/6350504
Publisher URL https://www.frontiersin.org/articles/10.3389/fmars.2021.640504/full

Files





You might also like



Downloadable Citations