Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean?
Otolith chemistry has been successfully used to reconstruct the environmental history experienced by estuarine-dependent teleost fish, including movement between estuaries and coastal areas. However, application has been more limited in species exposed exclusively to oceanic waters, where gradients...
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ftolddominionuni:oai:digitalcommons.odu.edu:ccpo_pubs-1097 2023-05-15T13:38:02+02:00 Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? Ashford, J. R. Jones, C. M. Hofmann, E. Everson, I. Moreno, C. Duhamel, G. Williams, R. 2005-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/ccpo_pubs/86 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1097&context=ccpo_pubs unknown ODU Digital Commons https://digitalcommons.odu.edu/ccpo_pubs/86 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1097&context=ccpo_pubs CCPO Publications Antarctic Circumpolar Current Water column Stock identification Population structure Export production Weddell sea Strontium Atlantic Pacific Barium Aquaculture and Fisheries Marine Biology Oceanography article 2005 ftolddominionuni 2021-03-02T18:08:52Z Otolith chemistry has been successfully used to reconstruct the environmental history experienced by estuarine-dependent teleost fish, including movement between estuaries and coastal areas. However, application has been more limited in species exposed exclusively to oceanic waters, where gradients in physical and chemical properties are less extreme. To test whether otolith elemental signatures record spatial information in an oceanic species, we sampled otoliths from Patagonian toothfish (Dissostichus eleginoides) and used an inductively coupled plasma mass spectrometer (ICP-MS) coupled to a laser ablation system to target the outer otolith edges corresponding to the period immediately before capture. Using multivariate analysis of variance and multivariate discriminant analysis, we found that edge signatures discriminated toothfish by geographic region with near complete success: only 5% of fish caught off South America and in the Antarctic were misclassified to sampling areas in the other region. Moreover, edge signatures showed strong differences between sampling areas within each region: fish captured off South America classified to sampling areas therein with 79%-84% success, and Antarctic fish classified to sampling areas therein with 50%-67% success. These results compare favourably with rates of classification for estuarine-dependent fish, demonstrating that otolith elemental signatures can discriminate the geographic provenance of oceanic and estuarine-dependent fish. Article in Journal/Newspaper Antarc* Antarctic Patagonian Toothfish Southern Ocean Weddell Sea Old Dominion University: ODU Digital Commons Antarctic Pacific Southern Ocean The Antarctic Weddell Weddell Sea |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Antarctic Circumpolar Current Water column Stock identification Population structure Export production Weddell sea Strontium Atlantic Pacific Barium Aquaculture and Fisheries Marine Biology Oceanography |
spellingShingle |
Antarctic Circumpolar Current Water column Stock identification Population structure Export production Weddell sea Strontium Atlantic Pacific Barium Aquaculture and Fisheries Marine Biology Oceanography Ashford, J. R. Jones, C. M. Hofmann, E. Everson, I. Moreno, C. Duhamel, G. Williams, R. Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? |
topic_facet |
Antarctic Circumpolar Current Water column Stock identification Population structure Export production Weddell sea Strontium Atlantic Pacific Barium Aquaculture and Fisheries Marine Biology Oceanography |
description |
Otolith chemistry has been successfully used to reconstruct the environmental history experienced by estuarine-dependent teleost fish, including movement between estuaries and coastal areas. However, application has been more limited in species exposed exclusively to oceanic waters, where gradients in physical and chemical properties are less extreme. To test whether otolith elemental signatures record spatial information in an oceanic species, we sampled otoliths from Patagonian toothfish (Dissostichus eleginoides) and used an inductively coupled plasma mass spectrometer (ICP-MS) coupled to a laser ablation system to target the outer otolith edges corresponding to the period immediately before capture. Using multivariate analysis of variance and multivariate discriminant analysis, we found that edge signatures discriminated toothfish by geographic region with near complete success: only 5% of fish caught off South America and in the Antarctic were misclassified to sampling areas in the other region. Moreover, edge signatures showed strong differences between sampling areas within each region: fish captured off South America classified to sampling areas therein with 79%-84% success, and Antarctic fish classified to sampling areas therein with 50%-67% success. These results compare favourably with rates of classification for estuarine-dependent fish, demonstrating that otolith elemental signatures can discriminate the geographic provenance of oceanic and estuarine-dependent fish. |
format |
Article in Journal/Newspaper |
author |
Ashford, J. R. Jones, C. M. Hofmann, E. Everson, I. Moreno, C. Duhamel, G. Williams, R. |
author_facet |
Ashford, J. R. Jones, C. M. Hofmann, E. Everson, I. Moreno, C. Duhamel, G. Williams, R. |
author_sort |
Ashford, J. R. |
title |
Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? |
title_short |
Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? |
title_full |
Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? |
title_fullStr |
Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? |
title_full_unstemmed |
Can Otolith Elemental Signatures Record The Capture Site of Patagonian toothfish (Dissostichus eleginoides), a Fully Marine Fish in the Southern Ocean? |
title_sort |
can otolith elemental signatures record the capture site of patagonian toothfish (dissostichus eleginoides), a fully marine fish in the southern ocean? |
publisher |
ODU Digital Commons |
publishDate |
2005 |
url |
https://digitalcommons.odu.edu/ccpo_pubs/86 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1097&context=ccpo_pubs |
geographic |
Antarctic Pacific Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Pacific Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Patagonian Toothfish Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Patagonian Toothfish Southern Ocean Weddell Sea |
op_source |
CCPO Publications |
op_relation |
https://digitalcommons.odu.edu/ccpo_pubs/86 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1097&context=ccpo_pubs |
_version_ |
1766100850234621952 |