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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ftdoajarticles:oai:doaj.org/article:e3916f90531c41bf9f333ebb8520951d 2023-05-15T16:05:13+02:00 Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone. John van den Hoff Robbie Kilpatrick Dirk Welsford 2017-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0172396 https://doaj.org/article/e3916f90531c41bf9f333ebb8520951d EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC5325274?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0172396 https://doaj.org/article/e3916f90531c41bf9f333ebb8520951d PLoS ONE, Vol 12, Iss 2, p e0172396 (2017) Medicine R Science Q article 2017 ftdoajarticles https://doi.org/10.1371/journal.pone.0172396 2022-12-31T00:32:52Z 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. Article in Journal/Newspaper Elephant Seal Elephant Seals Mirounga leonina Patagonian Toothfish Southern Elephant Seal Southern Elephant Seals Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean PLOS ONE 12 2 e0172396 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q John van den Hoff Robbie Kilpatrick Dirk Welsford Southern elephant seals (Mirounga leonina Linn.) depredate toothfish longlines in the midnight zone. |
topic_facet |
Medicine R Science Q |
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 |
Article in Journal/Newspaper |
author |
John van den Hoff Robbie Kilpatrick Dirk Welsford |
author_facet |
John van den Hoff Robbie Kilpatrick Dirk Welsford |
author_sort |
John van den Hoff |
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 (PLoS) |
publishDate |
2017 |
url |
https://doi.org/10.1371/journal.pone.0172396 https://doaj.org/article/e3916f90531c41bf9f333ebb8520951d |
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_source |
PLoS ONE, Vol 12, Iss 2, p e0172396 (2017) |
op_relation |
http://europepmc.org/articles/PMC5325274?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0172396 https://doaj.org/article/e3916f90531c41bf9f333ebb8520951d |
op_doi |
https://doi.org/10.1371/journal.pone.0172396 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
2 |
container_start_page |
e0172396 |
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1766401117446471680 |