Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current
Large-scale transport of seawater in ocean currents may generate spatially complex population structure through the advection of life stages of marine fish species. To test this, we compared the chemistry of otolith nuclei from Patagonian toothfish (Dissostichus eleginoides), presently managed as sp...
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ftolddominionuni:oai:digitalcommons.odu.edu:ccpo_pubs-1099 2023-05-15T13:38:02+02:00 Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current Ashford, Julian R. Jones, Cynthia M. Hofmann, Eileen E. Everson, Inigo Moreno, Carlos A. Duhamel, Guy Williams, Richard 2008-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/ccpo_pubs/81 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1099&context=ccpo_pubs unknown ODU Digital Commons https://digitalcommons.odu.edu/ccpo_pubs/81 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1099&context=ccpo_pubs CCPO Publications Toothfish Dissostichus eleginoides Trace element analysis Patagonian Southern Ocean Indian Ocean Water masses Stock Identification Genetic structure Drake Passage Aquaculture and Fisheries Marine Biology Oceanography article 2008 ftolddominionuni 2021-03-02T18:08:05Z Large-scale transport of seawater in ocean currents may generate spatially complex population structure through the advection of life stages of marine fish species. To test this, we compared the chemistry of otolith nuclei from Patagonian toothfish (Dissostichus eleginoides), presently managed as spatially discrete Populations corresponding to fishing management areas along the Antarctic Circumpolar Current (ACC), which transports water eastward around the Southern Ocean. The chemistry of otolith nuclei, laid down during early life, differed significantly between fishing areas Off South America and the Antarctic and between some Antarctic areas. However, we found significant discrepancies from expectation for a population structure corresponding to fishing areas. We also found evidence of four groups of fish with different early life chemistry: one associated with South America and three Antarctic groups showing mixing consistent with advective transport along the ACC. These results suggest that toothfish Populations are structured by their physical environment; Population abundance and persistence may rely on a restricted number of breeding members with access to spawning grounds, whereas fisheries may rely substantially on nonbreeding vagrants transported from fishing areas upstream. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Patagonian Toothfish Southern Ocean Old Dominion University: ODU Digital Commons Antarctic Drake Passage Indian Southern Ocean The Antarctic |
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Open Polar |
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Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Toothfish Dissostichus eleginoides Trace element analysis Patagonian Southern Ocean Indian Ocean Water masses Stock Identification Genetic structure Drake Passage Aquaculture and Fisheries Marine Biology Oceanography |
spellingShingle |
Toothfish Dissostichus eleginoides Trace element analysis Patagonian Southern Ocean Indian Ocean Water masses Stock Identification Genetic structure Drake Passage Aquaculture and Fisheries Marine Biology Oceanography Ashford, Julian R. Jones, Cynthia M. Hofmann, Eileen E. Everson, Inigo Moreno, Carlos A. Duhamel, Guy Williams, Richard Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current |
topic_facet |
Toothfish Dissostichus eleginoides Trace element analysis Patagonian Southern Ocean Indian Ocean Water masses Stock Identification Genetic structure Drake Passage Aquaculture and Fisheries Marine Biology Oceanography |
description |
Large-scale transport of seawater in ocean currents may generate spatially complex population structure through the advection of life stages of marine fish species. To test this, we compared the chemistry of otolith nuclei from Patagonian toothfish (Dissostichus eleginoides), presently managed as spatially discrete Populations corresponding to fishing management areas along the Antarctic Circumpolar Current (ACC), which transports water eastward around the Southern Ocean. The chemistry of otolith nuclei, laid down during early life, differed significantly between fishing areas Off South America and the Antarctic and between some Antarctic areas. However, we found significant discrepancies from expectation for a population structure corresponding to fishing areas. We also found evidence of four groups of fish with different early life chemistry: one associated with South America and three Antarctic groups showing mixing consistent with advective transport along the ACC. These results suggest that toothfish Populations are structured by their physical environment; Population abundance and persistence may rely on a restricted number of breeding members with access to spawning grounds, whereas fisheries may rely substantially on nonbreeding vagrants transported from fishing areas upstream. |
format |
Article in Journal/Newspaper |
author |
Ashford, Julian R. Jones, Cynthia M. Hofmann, Eileen E. Everson, Inigo Moreno, Carlos A. Duhamel, Guy Williams, Richard |
author_facet |
Ashford, Julian R. Jones, Cynthia M. Hofmann, Eileen E. Everson, Inigo Moreno, Carlos A. Duhamel, Guy Williams, Richard |
author_sort |
Ashford, Julian R. |
title |
Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current |
title_short |
Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current |
title_full |
Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current |
title_fullStr |
Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current |
title_full_unstemmed |
Otolith Chemistry Indicates Population Structuring By The Antarctic Circumpolar Current |
title_sort |
otolith chemistry indicates population structuring by the antarctic circumpolar current |
publisher |
ODU Digital Commons |
publishDate |
2008 |
url |
https://digitalcommons.odu.edu/ccpo_pubs/81 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1099&context=ccpo_pubs |
geographic |
Antarctic Drake Passage Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Drake Passage Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage Patagonian Toothfish Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Patagonian Toothfish Southern Ocean |
op_source |
CCPO Publications |
op_relation |
https://digitalcommons.odu.edu/ccpo_pubs/81 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1099&context=ccpo_pubs |
_version_ |
1766100803041361920 |