Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean
The population structure of walleye pollock (Theragra chalcogramma) in the northeastern Pacific Ocean remains unknown. We examined elemental signatures in the otoliths of larval and juvenile pollock from locations in the Bering Sea and Gulf of Alaska to determine if there were significant geographic...
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ftaquaticcommons:oai:generic.eprints.org:15087 2023-05-15T15:43:54+02:00 Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean FitzGerald, Jennifer L. Thorrold, Simon R. Bailey, Kevin M. Brown, Annette L. Severin, Kenneth P. 2004 application/pdf http://aquaticcommons.org/15087/ http://fishbull.noaa.gov/1024/fitzg.pdf http://aquaticcommons.org/15087/1/fitzg.pdf en eng http://aquaticcommons.org/15087/1/fitzg.pdf FitzGerald, Jennifer L. and Thorrold, Simon R. and Bailey, Kevin M. and Brown, Annette L. and Severin, Kenneth P. (2004) Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean. Fishery Bulletin, 102(4), pp. 604-616. Chemistry Fisheries Article PeerReviewed 2004 ftaquaticcommons 2020-02-27T09:26:46Z The population structure of walleye pollock (Theragra chalcogramma) in the northeastern Pacific Ocean remains unknown. We examined elemental signatures in the otoliths of larval and juvenile pollock from locations in the Bering Sea and Gulf of Alaska to determine if there were significant geographic variations in otolith composition that may be used as natural tags of population affinities. Otoliths were assayed by using both electron probe microanalysis (EPMA) and laser ablation inductively coupled plasma mass spectrometry (ICP-MS). Elements measured at the nucleus of otoliths by EPMA and laser ablation ICP-MS differed significantly among locations. However, geographic groupings identified by a multivariate statistical approach from EPMA and ICP-MS were dissimilar, indicating that the elements assayed by each technique were controlled by separate depositional processes within the endolymph. Elemental profiles across the pollock otoliths were generally consistent at distances up to 100 μm from the nucleus. At distances beyond 100 μm, profiles varied significantly but were remarkably consistent among individuals collected at each location. These data may indicate that larvae from various spawning locations are encountering water masses with differing physicochemical properties through their larval lives, and at approximately the same time. Although our results are promising, we require a better understanding of the mechanisms controlling otolith chemistry before it will be possible to reconstruct dispersal pathways of larval pollock based on probe-based analyses of otolith geochemistry. Elemental signatures in otoliths of pollock may allow for the delineation of fine-scale population structure in pollock that has yet to be consistently revealed by using population genetic approaches. Article in Journal/Newspaper Bering Sea Theragra chalcogramma Alaska International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons Bering Sea Gulf of Alaska Pacific |
institution |
Open Polar |
collection |
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
op_collection_id |
ftaquaticcommons |
language |
English |
topic |
Chemistry Fisheries |
spellingShingle |
Chemistry Fisheries FitzGerald, Jennifer L. Thorrold, Simon R. Bailey, Kevin M. Brown, Annette L. Severin, Kenneth P. Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean |
topic_facet |
Chemistry Fisheries |
description |
The population structure of walleye pollock (Theragra chalcogramma) in the northeastern Pacific Ocean remains unknown. We examined elemental signatures in the otoliths of larval and juvenile pollock from locations in the Bering Sea and Gulf of Alaska to determine if there were significant geographic variations in otolith composition that may be used as natural tags of population affinities. Otoliths were assayed by using both electron probe microanalysis (EPMA) and laser ablation inductively coupled plasma mass spectrometry (ICP-MS). Elements measured at the nucleus of otoliths by EPMA and laser ablation ICP-MS differed significantly among locations. However, geographic groupings identified by a multivariate statistical approach from EPMA and ICP-MS were dissimilar, indicating that the elements assayed by each technique were controlled by separate depositional processes within the endolymph. Elemental profiles across the pollock otoliths were generally consistent at distances up to 100 μm from the nucleus. At distances beyond 100 μm, profiles varied significantly but were remarkably consistent among individuals collected at each location. These data may indicate that larvae from various spawning locations are encountering water masses with differing physicochemical properties through their larval lives, and at approximately the same time. Although our results are promising, we require a better understanding of the mechanisms controlling otolith chemistry before it will be possible to reconstruct dispersal pathways of larval pollock based on probe-based analyses of otolith geochemistry. Elemental signatures in otoliths of pollock may allow for the delineation of fine-scale population structure in pollock that has yet to be consistently revealed by using population genetic approaches. |
format |
Article in Journal/Newspaper |
author |
FitzGerald, Jennifer L. Thorrold, Simon R. Bailey, Kevin M. Brown, Annette L. Severin, Kenneth P. |
author_facet |
FitzGerald, Jennifer L. Thorrold, Simon R. Bailey, Kevin M. Brown, Annette L. Severin, Kenneth P. |
author_sort |
FitzGerald, Jennifer L. |
title |
Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean |
title_short |
Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean |
title_full |
Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean |
title_fullStr |
Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean |
title_full_unstemmed |
Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean |
title_sort |
elemental signatures in otoliths of larval walleye pollock (theragra chalcogramma) from the northeast pacific ocean |
publishDate |
2004 |
url |
http://aquaticcommons.org/15087/ http://fishbull.noaa.gov/1024/fitzg.pdf http://aquaticcommons.org/15087/1/fitzg.pdf |
geographic |
Bering Sea Gulf of Alaska Pacific |
geographic_facet |
Bering Sea Gulf of Alaska Pacific |
genre |
Bering Sea Theragra chalcogramma Alaska |
genre_facet |
Bering Sea Theragra chalcogramma Alaska |
op_relation |
http://aquaticcommons.org/15087/1/fitzg.pdf FitzGerald, Jennifer L. and Thorrold, Simon R. and Bailey, Kevin M. and Brown, Annette L. and Severin, Kenneth P. (2004) Elemental signatures in otoliths of larval walleye pollock (Theragra chalcogramma) from the northeast Pacific Ocean. Fishery Bulletin, 102(4), pp. 604-616. |
_version_ |
1766378106772258816 |