155000 - Circumpolar sampling reveals high genetic connectivity of Antarctic toothfish.pdf (2.24 MB)
Circumpolar sampling reveals high genetic connectivity of Antarctic toothfish across their spatial distribution
journal contribution
posted on 2023-05-21, 15:56 authored by Dale MaschetteDale Maschette, Wotherspoon, S, Polanowski, A, Deagle, B, Welsford, D, Ziegler, PAntarctic Toothfish are a circumpolar species which are targeted in multiple fisheries around Antarctica covering nine statistical areas within the Convention for the Conservation of Antarctic Marine Living Resources. Despite this, it is still unclear whether the species forms a single stock across its circumpolar distribution, shows a pattern of isolation by distance, or exhibits discrete stock structure between different regions. Recent genetics studies of Antarctic toothfish have shown connectivity between two areas (Ross Sea and Antarctic Peninsula), but earlier studies with smaller number of markers produced inconsistent results with regards to genetic connectivity between other geographic locations. Here we present a range-wide population genetic study of Antarctic toothfish using > 11,000 nuclear single nucleotide polymorphisms from 715 fish collected. Our results indicate that genetic diversity of the Antarctic toothfish is very low, with only 0.1% of genetic variability associated with geographic location. Multiple clustering methods, both supervised and unsupervised, indicated no distinct breeding populations. These results are consistent with current theories of egg and larval dispersal by the predominant Antarctic currents.
History
Publication title
Reviews in Fish Biology and FisheriesVolume
33Pagination
295-310ISSN
0960-3166Department/School
Institute for Marine and Antarctic StudiesPublisher
Kluwer Academic PublPlace of publication
Van Godewijckstraat 30, Dordrecht, Netherlands, 3311 GzRights statement
© 2023 The Author(s) Open Access - This article is licensed under a Creative Commons Attribution 4.0 International License,(CC BY 4.0) https://creativecommons.org/licenses/by/4.0/Repository Status
- Open