Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod?
There is increasing recognition of intraspecific diversity and population structure within marine fish species, yet there is little direct evidence of the isolating mechanisms that maintain it or documentation of its ecological extent. We analyzed depth and temperature histories collected by electro...
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ftpubmed:oai:pubmedcentral.nih.gov:3049785 2023-05-15T15:27:31+02:00 Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? Grabowski, Timothy B. Thorsteinsson, Vilhjálmur McAdam, Bruce J. Marteinsdóttir, Guđrún 2011-03-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049785 http://www.ncbi.nlm.nih.gov/pubmed/21408180 https://doi.org/10.1371/journal.pone.0017528 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049785 http://www.ncbi.nlm.nih.gov/pubmed/21408180 http://dx.doi.org/10.1371/journal.pone.0017528 This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. PDM Research Article Text 2011 ftpubmed https://doi.org/10.1371/journal.pone.0017528 2013-09-03T11:45:33Z There is increasing recognition of intraspecific diversity and population structure within marine fish species, yet there is little direct evidence of the isolating mechanisms that maintain it or documentation of its ecological extent. We analyzed depth and temperature histories collected by electronic data storage tags retrieved from 104 Atlantic cod at liberty ≥1 year to evaluate a possible isolating mechanisms maintaining population structure within the Icelandic cod stock. This stock consists of two distinct behavioral types, resident coastal cod and migratory frontal cod, each occurring within two geographically distinct populations. Despite being captured together on the same spawning grounds, we show the behavioral types seem reproductively isolated by fine-scale differences in spawning habitat selection, primarily depth. Additionally, the different groups occupied distinct seasonal thermal and bathymetric niches that generally demonstrated low levels of overlap throughout the year. Our results indicate that isolating mechanisms, such as differential habitat selection during spawning, might contribute to maintaining diversity and fine-scale population structure in broadcast-spawning marine fishes. Text atlantic cod PubMed Central (PMC) PLoS ONE 6 3 e17528 |
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Research Article Grabowski, Timothy B. Thorsteinsson, Vilhjálmur McAdam, Bruce J. Marteinsdóttir, Guđrún Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? |
topic_facet |
Research Article |
description |
There is increasing recognition of intraspecific diversity and population structure within marine fish species, yet there is little direct evidence of the isolating mechanisms that maintain it or documentation of its ecological extent. We analyzed depth and temperature histories collected by electronic data storage tags retrieved from 104 Atlantic cod at liberty ≥1 year to evaluate a possible isolating mechanisms maintaining population structure within the Icelandic cod stock. This stock consists of two distinct behavioral types, resident coastal cod and migratory frontal cod, each occurring within two geographically distinct populations. Despite being captured together on the same spawning grounds, we show the behavioral types seem reproductively isolated by fine-scale differences in spawning habitat selection, primarily depth. Additionally, the different groups occupied distinct seasonal thermal and bathymetric niches that generally demonstrated low levels of overlap throughout the year. Our results indicate that isolating mechanisms, such as differential habitat selection during spawning, might contribute to maintaining diversity and fine-scale population structure in broadcast-spawning marine fishes. |
format |
Text |
author |
Grabowski, Timothy B. Thorsteinsson, Vilhjálmur McAdam, Bruce J. Marteinsdóttir, Guđrún |
author_facet |
Grabowski, Timothy B. Thorsteinsson, Vilhjálmur McAdam, Bruce J. Marteinsdóttir, Guđrún |
author_sort |
Grabowski, Timothy B. |
title |
Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? |
title_short |
Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? |
title_full |
Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? |
title_fullStr |
Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? |
title_full_unstemmed |
Evidence of Segregated Spawning in a Single Marine Fish Stock: Sympatric Divergence of Ecotypes in Icelandic Cod? |
title_sort |
evidence of segregated spawning in a single marine fish stock: sympatric divergence of ecotypes in icelandic cod? |
publisher |
Public Library of Science |
publishDate |
2011 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049785 http://www.ncbi.nlm.nih.gov/pubmed/21408180 https://doi.org/10.1371/journal.pone.0017528 |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049785 http://www.ncbi.nlm.nih.gov/pubmed/21408180 http://dx.doi.org/10.1371/journal.pone.0017528 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. |
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PDM |
op_doi |
https://doi.org/10.1371/journal.pone.0017528 |
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PLoS ONE |
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6 |
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3 |
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e17528 |
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1766357950548410368 |