Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change
Abstract The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ considerably across the species' geographical distribution. He...
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Online Access: | http://dx.doi.org/10.1111/faf.12728 https://onlinelibrary.wiley.com/doi/pdf/10.1111/faf.12728 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/faf.12728 |
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crwiley:10.1111/faf.12728 2024-09-15T17:55:28+00:00 Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change Kjesbu, Olav Sigurd Alix, Maud Sandø, Anne Britt Strand, Espen Wright, Peter J. Johns, David G. Thorsen, Anders Marshall, C. Tara Bakkeplass, Kjell Gunnar Vikebø, Frode B. Skuggedal Myksvoll, Mari Ottersen, Geir Allan, Bridie J. M. Fossheim, Maria Stiansen, Jan Erik Huse, Geir Sundby, Svein Havforskningsinstituttet Norges Forskningsråd Scottish Government Trond Mohn stiftelse Continuous Plankton Recorder Survey 2023 http://dx.doi.org/10.1111/faf.12728 https://onlinelibrary.wiley.com/doi/pdf/10.1111/faf.12728 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/faf.12728 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Fish and Fisheries volume 24, issue 2, page 297-320 ISSN 1467-2960 1467-2979 journal-article 2023 crwiley https://doi.org/10.1111/faf.12728 2024-08-22T04:16:06Z Abstract The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ considerably across the species' geographical distribution. Here we investigated the life history, focusing on reproductive ecology, of three spatially distant populations (stocks) of Atlantic cod ( Gadus morhua , Gadidae) (50–80° N), in the Irish/Celtic Seas‐English Channel Complex, North and Barents Seas, under past and projected climate. First, experimental tracking of spawning behaviour evidenced that the ovulation cycle is highly distressed at ≥9.6 (±0.25)°C ( T up ). This knife‐edge threshold resulted in erratic spawning frequencies, whereas vitellogenin sequestration remained unaffected, indicating endocrine rather than aerobic scope constraints. Cod in the Celtic Sea‐English Channel are, therefore, expected to show critical stock depensation over the next decades as spawning grounds warm above T up , with Irish Sea cod subsequently at risk. Second, in the relatively cooler North Sea, the northward retraction of Calanus finmarchicus (Calanidae) and Para‐Pseudocalanus spp. (Clausocalanidae) (1958–2017) limit cod larvae feeding opportunities, particularly in the southernmost subarea. However, the contrasting increase in Calanus helgolandicus (Calanidae) does not counteract this negative effect, likely because cod larvae hatch ahead of its abundance peaks. Overfishing again comes as a twin effect. Third, in the still relatively cold Barents Sea, the sustainably harvested cod benefit from improved food conditions in the recent ice‐free polar region but at the energetic cost of lengthier and faster spawning migrations. Consequently, under climate change local stocks are stressed by different mechanistic factors of varying management severity. Article in Journal/Newspaper atlantic cod Barents Sea Calanus finmarchicus Gadus morhua Wiley Online Library Fish and Fisheries 24 2 297 320 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ considerably across the species' geographical distribution. Here we investigated the life history, focusing on reproductive ecology, of three spatially distant populations (stocks) of Atlantic cod ( Gadus morhua , Gadidae) (50–80° N), in the Irish/Celtic Seas‐English Channel Complex, North and Barents Seas, under past and projected climate. First, experimental tracking of spawning behaviour evidenced that the ovulation cycle is highly distressed at ≥9.6 (±0.25)°C ( T up ). This knife‐edge threshold resulted in erratic spawning frequencies, whereas vitellogenin sequestration remained unaffected, indicating endocrine rather than aerobic scope constraints. Cod in the Celtic Sea‐English Channel are, therefore, expected to show critical stock depensation over the next decades as spawning grounds warm above T up , with Irish Sea cod subsequently at risk. Second, in the relatively cooler North Sea, the northward retraction of Calanus finmarchicus (Calanidae) and Para‐Pseudocalanus spp. (Clausocalanidae) (1958–2017) limit cod larvae feeding opportunities, particularly in the southernmost subarea. However, the contrasting increase in Calanus helgolandicus (Calanidae) does not counteract this negative effect, likely because cod larvae hatch ahead of its abundance peaks. Overfishing again comes as a twin effect. Third, in the still relatively cold Barents Sea, the sustainably harvested cod benefit from improved food conditions in the recent ice‐free polar region but at the energetic cost of lengthier and faster spawning migrations. Consequently, under climate change local stocks are stressed by different mechanistic factors of varying management severity. |
author2 |
Havforskningsinstituttet Norges Forskningsråd Scottish Government Trond Mohn stiftelse Continuous Plankton Recorder Survey |
format |
Article in Journal/Newspaper |
author |
Kjesbu, Olav Sigurd Alix, Maud Sandø, Anne Britt Strand, Espen Wright, Peter J. Johns, David G. Thorsen, Anders Marshall, C. Tara Bakkeplass, Kjell Gunnar Vikebø, Frode B. Skuggedal Myksvoll, Mari Ottersen, Geir Allan, Bridie J. M. Fossheim, Maria Stiansen, Jan Erik Huse, Geir Sundby, Svein |
spellingShingle |
Kjesbu, Olav Sigurd Alix, Maud Sandø, Anne Britt Strand, Espen Wright, Peter J. Johns, David G. Thorsen, Anders Marshall, C. Tara Bakkeplass, Kjell Gunnar Vikebø, Frode B. Skuggedal Myksvoll, Mari Ottersen, Geir Allan, Bridie J. M. Fossheim, Maria Stiansen, Jan Erik Huse, Geir Sundby, Svein Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
author_facet |
Kjesbu, Olav Sigurd Alix, Maud Sandø, Anne Britt Strand, Espen Wright, Peter J. Johns, David G. Thorsen, Anders Marshall, C. Tara Bakkeplass, Kjell Gunnar Vikebø, Frode B. Skuggedal Myksvoll, Mari Ottersen, Geir Allan, Bridie J. M. Fossheim, Maria Stiansen, Jan Erik Huse, Geir Sundby, Svein |
author_sort |
Kjesbu, Olav Sigurd |
title |
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
title_short |
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
title_full |
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
title_fullStr |
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
title_full_unstemmed |
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
title_sort |
latitudinally distinct stocks of atlantic cod face fundamentally different biophysical challenges under on‐going climate change |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/faf.12728 https://onlinelibrary.wiley.com/doi/pdf/10.1111/faf.12728 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/faf.12728 |
genre |
atlantic cod Barents Sea Calanus finmarchicus Gadus morhua |
genre_facet |
atlantic cod Barents Sea Calanus finmarchicus Gadus morhua |
op_source |
Fish and Fisheries volume 24, issue 2, page 297-320 ISSN 1467-2960 1467-2979 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/faf.12728 |
container_title |
Fish and Fisheries |
container_volume |
24 |
container_issue |
2 |
container_start_page |
297 |
op_container_end_page |
320 |
_version_ |
1810431754562961408 |