Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning?
Specific changes identified in the otolith macrostructure of Northeast Arctic cod as “spawning zones” are presumed to represent spawning events, but recent experimental studies have challenged this relationship. Because these zones are not routinely recorded outside of Norway, otoliths from multiple...
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Online Access: | http://dx.doi.org/10.1371/journal.pone.0257218 https://dx.plos.org/10.1371/journal.pone.0257218 |
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crplos:10.1371/journal.pone.0257218 2024-09-09T19:17:18+00:00 Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? Denechaud, Côme Geffen, Audrey J. Smoliński, Szymon Godiksen, Jane A. Belgrano, Andrea Icelandic Centre for Research 2021 http://dx.doi.org/10.1371/journal.pone.0257218 https://dx.plos.org/10.1371/journal.pone.0257218 en eng Public Library of Science (PLoS) http://creativecommons.org/licenses/by/4.0/ PLOS ONE volume 16, issue 9, page e0257218 ISSN 1932-6203 journal-article 2021 crplos https://doi.org/10.1371/journal.pone.0257218 2024-06-18T04:07:51Z Specific changes identified in the otolith macrostructure of Northeast Arctic cod as “spawning zones” are presumed to represent spawning events, but recent experimental studies have challenged this relationship. Because these zones are not routinely recorded outside of Norway, otoliths from multiple Atlantic cod populations with different life history and environmental traits were first examined to see if spawning zones could be identified as a general characteristic of cod. Then, a large archival collection of cod otoliths was used to investigate temporal changes in the occurrence of spawning zones and test for correlations between maturity at age derived from otolith spawning zones and gonad maturity stages. This study shows that spawning zones likely are a universal trait of Atlantic cod and not limited to certain environments or migratory behaviors as previously proposed. Maturity at age derived from spawning zone data showed trends consistent with those from gonad examinations. However, spawning zones appear to form with a one- or two-year lag with sexual maturity, which is suspected to reflect a stabilizing of energy partitioning after the first spawning events. Our results illustrate the potential for use of spawning zones, for example in species or populations with limited available maturity data, and highlights the need for addressing the physiological processes behind their formation. Article in Journal/Newspaper Arctic cod Arctic atlantic cod Northeast Arctic cod PLOS Arctic Norway PLOS ONE 16 9 e0257218 |
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language |
English |
description |
Specific changes identified in the otolith macrostructure of Northeast Arctic cod as “spawning zones” are presumed to represent spawning events, but recent experimental studies have challenged this relationship. Because these zones are not routinely recorded outside of Norway, otoliths from multiple Atlantic cod populations with different life history and environmental traits were first examined to see if spawning zones could be identified as a general characteristic of cod. Then, a large archival collection of cod otoliths was used to investigate temporal changes in the occurrence of spawning zones and test for correlations between maturity at age derived from otolith spawning zones and gonad maturity stages. This study shows that spawning zones likely are a universal trait of Atlantic cod and not limited to certain environments or migratory behaviors as previously proposed. Maturity at age derived from spawning zone data showed trends consistent with those from gonad examinations. However, spawning zones appear to form with a one- or two-year lag with sexual maturity, which is suspected to reflect a stabilizing of energy partitioning after the first spawning events. Our results illustrate the potential for use of spawning zones, for example in species or populations with limited available maturity data, and highlights the need for addressing the physiological processes behind their formation. |
author2 |
Belgrano, Andrea Icelandic Centre for Research |
format |
Article in Journal/Newspaper |
author |
Denechaud, Côme Geffen, Audrey J. Smoliński, Szymon Godiksen, Jane A. |
spellingShingle |
Denechaud, Côme Geffen, Audrey J. Smoliński, Szymon Godiksen, Jane A. Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? |
author_facet |
Denechaud, Côme Geffen, Audrey J. Smoliński, Szymon Godiksen, Jane A. |
author_sort |
Denechaud, Côme |
title |
Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? |
title_short |
Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? |
title_full |
Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? |
title_fullStr |
Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? |
title_full_unstemmed |
Otolith “spawning zones” across multiple Atlantic cod populations: Do they accurately record maturity and spawning? |
title_sort |
otolith “spawning zones” across multiple atlantic cod populations: do they accurately record maturity and spawning? |
publisher |
Public Library of Science (PLoS) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1371/journal.pone.0257218 https://dx.plos.org/10.1371/journal.pone.0257218 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic cod Arctic atlantic cod Northeast Arctic cod |
genre_facet |
Arctic cod Arctic atlantic cod Northeast Arctic cod |
op_source |
PLOS ONE volume 16, issue 9, page e0257218 ISSN 1932-6203 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1371/journal.pone.0257218 |
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PLOS ONE |
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16 |
container_issue |
9 |
container_start_page |
e0257218 |
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1809757307622391808 |