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First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters

Baited remote underwater video cameras were deployed in the Eastern Canadian Arctic, for the purpose of estimating local densities of the long-lived Greenland shark within five deep-water, data-poor regions of interest for fisheries development and marine conservation in Nunavut, Canada. A total of...

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Autores principales: Devine, Brynn M., Wheeland, Laura J., Fisher, Jonathan A. D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5772532/
https://www.ncbi.nlm.nih.gov/pubmed/29343730
http://dx.doi.org/10.1038/s41598-017-19115-x
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author Devine, Brynn M.
Wheeland, Laura J.
Fisher, Jonathan A. D.
author_facet Devine, Brynn M.
Wheeland, Laura J.
Fisher, Jonathan A. D.
author_sort Devine, Brynn M.
collection PubMed
description Baited remote underwater video cameras were deployed in the Eastern Canadian Arctic, for the purpose of estimating local densities of the long-lived Greenland shark within five deep-water, data-poor regions of interest for fisheries development and marine conservation in Nunavut, Canada. A total of 31 camera deployments occurred between July-September in 2015 and 2016 during joint exploratory fishing and scientific cruises. Greenland sharks appeared at 80% of deployments. A total of 142 individuals were identified and no individuals were observed in more than one deployment. Estimates of Greenland shark abundance and biomass were calculated from averaged times of first arrival, video-derived swimming speed and length data, and local current speed estimates. Density estimates varied 1–15 fold among regions; being highest in warmer (>0 °C), deeper areas and lowest in shallow, sub-zero temperature regions. These baited camera results illustrate the ubiquity of this elusive species and suggest that Nunavut’s Lancaster Sound eco-zone may be of particular importance for Greenland shark, a potentially vulnerable Arctic species.
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spelling pubmed-57725322018-01-26 First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters Devine, Brynn M. Wheeland, Laura J. Fisher, Jonathan A. D. Sci Rep Article Baited remote underwater video cameras were deployed in the Eastern Canadian Arctic, for the purpose of estimating local densities of the long-lived Greenland shark within five deep-water, data-poor regions of interest for fisheries development and marine conservation in Nunavut, Canada. A total of 31 camera deployments occurred between July-September in 2015 and 2016 during joint exploratory fishing and scientific cruises. Greenland sharks appeared at 80% of deployments. A total of 142 individuals were identified and no individuals were observed in more than one deployment. Estimates of Greenland shark abundance and biomass were calculated from averaged times of first arrival, video-derived swimming speed and length data, and local current speed estimates. Density estimates varied 1–15 fold among regions; being highest in warmer (>0 °C), deeper areas and lowest in shallow, sub-zero temperature regions. These baited camera results illustrate the ubiquity of this elusive species and suggest that Nunavut’s Lancaster Sound eco-zone may be of particular importance for Greenland shark, a potentially vulnerable Arctic species. Nature Publishing Group UK 2018-01-17 /pmc/articles/PMC5772532/ /pubmed/29343730 http://dx.doi.org/10.1038/s41598-017-19115-x Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Devine, Brynn M.
Wheeland, Laura J.
Fisher, Jonathan A. D.
First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters
title First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters
title_full First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters
title_fullStr First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters
title_full_unstemmed First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters
title_short First estimates of Greenland shark (Somniosus microcephalus) local abundances in Arctic waters
title_sort first estimates of greenland shark (somniosus microcephalus) local abundances in arctic waters
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5772532/
https://www.ncbi.nlm.nih.gov/pubmed/29343730
http://dx.doi.org/10.1038/s41598-017-19115-x
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