Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use
Coexistence of fish populations (= stocks) of the same species is a common phenomenon. In the Baltic Sea, two genetically divergent stocks of Atlantic cod (Gadus morhua), Western Baltic cod (WBC) and Eastern Baltic cod (EBC), coexist in the Arkona Sea. Although the relative proportions of WBC and EB...
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ftopenagrar:oai:www.openagrar.de:openagrar_mods_00082649 2024-09-15T17:55:34+00:00 Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use Schade, Franziska Maria Weist, Peggy Dierking, Jan Krumme, Uwe 2022 https://doi.org/10.1371/journal.pone.0274476 https://www.openagrar.de/receive/openagrar_mods_00082649 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00049062/dn065429.pdf eng eng PLOS ONE -- PLoS One -- PLoS one -- PLoS ONE -- 1932-6203 -- 2267670-3 -- http://journals.plos.org/plosone/ -- https://www.ncbi.nlm.nih.gov/pmc/journals/440/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2267670 https://doi.org/10.1371/journal.pone.0274476 https://www.openagrar.de/receive/openagrar_mods_00082649 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00049062/dn065429.pdf public https://open-access.net/ info:eu-repo/semantics/openAccess Text article ddc:570 article Text doc-type:article 2022 ftopenagrar https://doi.org/10.1371/journal.pone.0274476 2024-07-08T23:56:24Z Coexistence of fish populations (= stocks) of the same species is a common phenomenon. In the Baltic Sea, two genetically divergent stocks of Atlantic cod (Gadus morhua), Western Baltic cod (WBC) and Eastern Baltic cod (EBC), coexist in the Arkona Sea. Although the relative proportions of WBC and EBC in this area are considered in the current stock assessments, the mixing dynamics and ecological mechanisms underlying coexistence are not well understood. In this study, a genetically validated otolith shape analysis was used to develop the most comprehensive time series of annual stock mixing data (1977-2019) for WBC and EBC. Spatio-temporal mixing analysis confirmed that the two stocks coexist in the Arkona Sea, albeit with fluctuating mixing proportions over the 43-year observation period. Depth-stratified analysis revealed a strong correlation between capture depth and stock mixing patterns, with high proportions of WBC in shallower waters (48-61% in <20m) and increasing proportions of EBC in deeper waters (50-86% in 40-70m). Consistent depth-specific mixing patterns indicate stable differences in depth distribution and habitat use of WBC and EBC that may thus underlie the long-term coexistence of the two stocks in the Arkona Sea. These differences were also reflected in significantly different proportions of WBC and EBC in fisheries applying passive gears in shallower waters (more WBC) and active gears in deeper waters (more EBC). This highlights the potential for fishing gear-specific exploitation of different stocks, and calls for stronger consideration of capture depth and gear type in stock assessments. This novel evidence provides the basis for improved approaches to research, monitoring and management of Baltic cod stocks. Article in Journal/Newspaper atlantic cod Gadus morhua OpenAgrar (OA) PLOS ONE 17 9 e0274476 |
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Text article ddc:570 Schade, Franziska Maria Weist, Peggy Dierking, Jan Krumme, Uwe Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use |
topic_facet |
Text article ddc:570 |
description |
Coexistence of fish populations (= stocks) of the same species is a common phenomenon. In the Baltic Sea, two genetically divergent stocks of Atlantic cod (Gadus morhua), Western Baltic cod (WBC) and Eastern Baltic cod (EBC), coexist in the Arkona Sea. Although the relative proportions of WBC and EBC in this area are considered in the current stock assessments, the mixing dynamics and ecological mechanisms underlying coexistence are not well understood. In this study, a genetically validated otolith shape analysis was used to develop the most comprehensive time series of annual stock mixing data (1977-2019) for WBC and EBC. Spatio-temporal mixing analysis confirmed that the two stocks coexist in the Arkona Sea, albeit with fluctuating mixing proportions over the 43-year observation period. Depth-stratified analysis revealed a strong correlation between capture depth and stock mixing patterns, with high proportions of WBC in shallower waters (48-61% in <20m) and increasing proportions of EBC in deeper waters (50-86% in 40-70m). Consistent depth-specific mixing patterns indicate stable differences in depth distribution and habitat use of WBC and EBC that may thus underlie the long-term coexistence of the two stocks in the Arkona Sea. These differences were also reflected in significantly different proportions of WBC and EBC in fisheries applying passive gears in shallower waters (more WBC) and active gears in deeper waters (more EBC). This highlights the potential for fishing gear-specific exploitation of different stocks, and calls for stronger consideration of capture depth and gear type in stock assessments. This novel evidence provides the basis for improved approaches to research, monitoring and management of Baltic cod stocks. |
format |
Article in Journal/Newspaper |
author |
Schade, Franziska Maria Weist, Peggy Dierking, Jan Krumme, Uwe |
author_facet |
Schade, Franziska Maria Weist, Peggy Dierking, Jan Krumme, Uwe |
author_sort |
Schade, Franziska Maria |
title |
Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use |
title_short |
Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use |
title_full |
Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use |
title_fullStr |
Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use |
title_full_unstemmed |
Living apart together : long-term coexistence of Baltic cod stocks associated with depth-specific habitat use |
title_sort |
living apart together : long-term coexistence of baltic cod stocks associated with depth-specific habitat use |
publishDate |
2022 |
url |
https://doi.org/10.1371/journal.pone.0274476 https://www.openagrar.de/receive/openagrar_mods_00082649 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00049062/dn065429.pdf |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
PLOS ONE -- PLoS One -- PLoS one -- PLoS ONE -- 1932-6203 -- 2267670-3 -- http://journals.plos.org/plosone/ -- https://www.ncbi.nlm.nih.gov/pmc/journals/440/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2267670 https://doi.org/10.1371/journal.pone.0274476 https://www.openagrar.de/receive/openagrar_mods_00082649 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00049062/dn065429.pdf |
op_rights |
public https://open-access.net/ info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0274476 |
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PLOS ONE |
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17 |
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