Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone
Humans have devised fishing technologies that compete with marine predators for fish resources world-wide. One such fishery for the Patagonian toothfish (Dissostichus eleginoides) has developed interactions with a range of predators, some of which are marine mammals capable of diving to extreme dept...
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ftpubmed:oai:pubmedcentral.nih.gov:5325274 2023-05-15T16:05:13+02:00 Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone van den Hoff, John Kilpatrick, Robbie Welsford, Dirk 2017-02-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5325274/ http://www.ncbi.nlm.nih.gov/pubmed/28234988 https://doi.org/10.1371/journal.pone.0172396 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5325274/ http://www.ncbi.nlm.nih.gov/pubmed/28234988 http://dx.doi.org/10.1371/journal.pone.0172396 © 2017 van den Hoff et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2017 ftpubmed https://doi.org/10.1371/journal.pone.0172396 2017-03-12T01:07:22Z Humans have devised fishing technologies that compete with marine predators for fish resources world-wide. One such fishery for the Patagonian toothfish (Dissostichus eleginoides) has developed interactions with a range of predators, some of which are marine mammals capable of diving to extreme depths for extended periods. A deep-sea camera system deployed within a toothfish fishery operating in the Southern Ocean acquired the first-ever video footage of an extreme-diver, the southern elephant seal (Mirounga leonina), depredating catch from longlines set at depths in excess of 1000m. The interactions recorded were non-lethal, however independent fisheries observer reports confirm elephant seal-longline interactions can be lethal. The seals behaviour of depredating catch at depth during the line soak-period differs to other surface-breathing species and thus presents a unique challenge to mitigate their by-catch. Deployments of deep-sea cameras on exploratory fishing gear prior to licencing and permit approvals would gather valuable information regarding the nature of interactions between deep diving/dwelling marine species and longline fisheries operating at bathypelagic depths. Furthermore, the positive identification by sex and age class of species interacting with commercial fisheries would assist in formulating management plans and mitigation strategies founded on species-specific life-history strategies. Text Elephant Seal Elephant Seals Mirounga leonina Patagonian Toothfish Southern Elephant Seal Southern Elephant Seals Southern Ocean PubMed Central (PMC) Southern Ocean PLOS ONE 12 2 e0172396 |
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Research Article van den Hoff, John Kilpatrick, Robbie Welsford, Dirk Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone |
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Research Article |
description |
Humans have devised fishing technologies that compete with marine predators for fish resources world-wide. One such fishery for the Patagonian toothfish (Dissostichus eleginoides) has developed interactions with a range of predators, some of which are marine mammals capable of diving to extreme depths for extended periods. A deep-sea camera system deployed within a toothfish fishery operating in the Southern Ocean acquired the first-ever video footage of an extreme-diver, the southern elephant seal (Mirounga leonina), depredating catch from longlines set at depths in excess of 1000m. The interactions recorded were non-lethal, however independent fisheries observer reports confirm elephant seal-longline interactions can be lethal. The seals behaviour of depredating catch at depth during the line soak-period differs to other surface-breathing species and thus presents a unique challenge to mitigate their by-catch. Deployments of deep-sea cameras on exploratory fishing gear prior to licencing and permit approvals would gather valuable information regarding the nature of interactions between deep diving/dwelling marine species and longline fisheries operating at bathypelagic depths. Furthermore, the positive identification by sex and age class of species interacting with commercial fisheries would assist in formulating management plans and mitigation strategies founded on species-specific life-history strategies. |
format |
Text |
author |
van den Hoff, John Kilpatrick, Robbie Welsford, Dirk |
author_facet |
van den Hoff, John Kilpatrick, Robbie Welsford, Dirk |
author_sort |
van den Hoff, John |
title |
Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone |
title_short |
Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone |
title_full |
Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone |
title_fullStr |
Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone |
title_full_unstemmed |
Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone |
title_sort |
southern elephant seals (mirounga leonina linn.) depredate toothfish longlines in the midnight zone |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5325274/ http://www.ncbi.nlm.nih.gov/pubmed/28234988 https://doi.org/10.1371/journal.pone.0172396 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Elephant Seal Elephant Seals Mirounga leonina Patagonian Toothfish Southern Elephant Seal Southern Elephant Seals Southern Ocean |
genre_facet |
Elephant Seal Elephant Seals Mirounga leonina Patagonian Toothfish Southern Elephant Seal Southern Elephant Seals Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5325274/ http://www.ncbi.nlm.nih.gov/pubmed/28234988 http://dx.doi.org/10.1371/journal.pone.0172396 |
op_rights |
© 2017 van den Hoff et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0172396 |
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PLOS ONE |
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12 |
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2 |
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e0172396 |
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