Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/103640
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Type: Journal article
Title: Analysis of vertebral chemistry to assess stock structure in a deep-sea shark, Etmopterus spinax
Author: McMillan, M.
Izzo, C.
Junge, C.
Albert, O.
Jung, A.
Gillanders, B.
Citation: ICES Journal of Marine Science: journal du conseil, 2017; 74(3):793-803
Publisher: Oxford University Press (OUP)
Issue Date: 2017
ISSN: 1095-9289
1095-9289
Statement of
Responsibility: 
Matthew N. McMillan, Christopher Izzo, Claudia Junge, Ole Thomas Albert, Armelle Jung and Bronwyn M. Gillanders
Abstract: Deep-sea sharks play a valuable ecological role helping maintain food web balance, yet they are vulnerable to commercial fishing because of slow growth rates and low reproductive capacity. Overfishing of sharks can heavily impact marine ecosystems and the fisheries these support. Knowledge of stock structure is integral to sustainable management of fisheries. The present study analysed vertebral chemistry using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to assay concentrations of 7Li, 23Na, 24Mg, 55Mn, 59Co, 60Ni, 63Cu, 66Zn, 85Rb, 88Sr, 138Ba and 208Pb to assess stock structure in a deep-sea shark, Etmopterus spinax, in Norwegian and French waters. Few studies have applied this technique to elasmobranch vertebrae and the present study represents its first application to a deep-sea shark. Three stocks were identified at the regional scale off western Norway, southern Norway, and France. At finer spatial scales there was evidence of strong population mixing. Overall, the general pattern of stock structure outlined herein provides some indication of the spatial scales at which stocks should be viewed as distinct fisheries management units. The identification of an effective multi-element signature for distinguishing E. spinax stocks utilizing Sr, Ba, Mg, Zn and Pb and the methodological groundwork laid in the present study could also expedite future research into stock structure for E. spinax and deep-sea elasmobranchs more generally.
Keywords: deep-sea; LA-ICP-MS; shark; stock structure; vertebral chemistry
Description: First published online: October 27, 2016
Rights: © International Council for the Exploration of the Sea 2016. All rights reserved. For Permissions, please email: journals.permissions@oup.com
RMID: 0030059141
DOI: 10.1093/icesjms/fsw176
Grant ID: http://purl.org/au-research/grants/arc/LP120100652
Appears in Collections:Earth and Environmental Sciences publications

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