Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints
The Northeast Atlantic mackerel is an income breeder with indeterminate fecundity, spawning in multiple batches at optimal temperatures around 11°C in the upper water column during February–July along the continental shelf from 36–62°N. Based on macroscopic staging of gonads (N ∼62000) collected in...
Published in: | ICES Journal of Marine Science |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2024
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Online Access: | https://orbit.dtu.dk/en/publications/5a3f4381-3b5b-42da-87ec-0d3080e0f37f https://doi.org/10.1093/icesjms/fsad098 https://backend.orbit.dtu.dk/ws/files/359164728/fsad098.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/5a3f4381-3b5b-42da-87ec-0d3080e0f37f 2024-06-23T07:55:27+00:00 Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints Schmidt, T. C. dos Santos Slotte, A. Olafsdottir, A. H. Nøttestad, L. Jansen, T. Jacobsen, J. A. Bjarnason, S. Lusseau, S. M. Ono, K. Holleland, S. Thorsen, A. Sando, A. B. Kjesbu, O. S. 2024 application/pdf https://orbit.dtu.dk/en/publications/5a3f4381-3b5b-42da-87ec-0d3080e0f37f https://doi.org/10.1093/icesjms/fsad098 https://backend.orbit.dtu.dk/ws/files/359164728/fsad098.pdf eng eng https://orbit.dtu.dk/en/publications/5a3f4381-3b5b-42da-87ec-0d3080e0f37f info:eu-repo/semantics/openAccess Schmidt , T C D S , Slotte , A , Olafsdottir , A H , Nøttestad , L , Jansen , T , Jacobsen , J A , Bjarnason , S , Lusseau , S M , Ono , K , Holleland , S , Thorsen , A , Sando , A B & Kjesbu , O S 2024 , ' Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints ' , ICES Journal of Marine Science , vol. 81 , no. 3 , fsad098 , pp. 600-615 . https://doi.org/10.1093/icesjms/fsad098 Conditioning factor Global warming Histology Macroscopic maturity Northeast Atlantic mackerel Spawning extension Stock size article 2024 ftdtupubl https://doi.org/10.1093/icesjms/fsad098 2024-06-11T15:18:37Z The Northeast Atlantic mackerel is an income breeder with indeterminate fecundity, spawning in multiple batches at optimal temperatures around 11°C in the upper water column during February–July along the continental shelf from 36–62°N. Based on macroscopic staging of gonads (N ∼62000) collected in 2004–2021, we detected an on-going extension of spawning activities into the Norwegian Sea feeding area (62–75°N), reaching stable levels around 2012 onwards. This poleward expansion increased as more fish entered the area, whilst the maximum proportions of spawners concurrently dropped from about 75 to 15% from May to July. Detailed histological examinations in 2018 confirmed the macroscopic results but clarified that 38% of the spawning-capable females in July terminated their spawning by atresia. We suggest that increased access to suitable spawning areas (≥10°C), following ocean warming from 2002 onwards, functions as a proximate cause behind the noticed expansion, whereas the ultimate trigger was the historic drop in body growth and condition about 10 years later. Driven by these energetic constraints, mackerel likely spawn in the direction of high prey concentrations to rebuild body resources and secure the future rather than current reproduction success. The ambient temperature that far north is considered suboptimal for egg and larval survival. Article in Journal/Newspaper Northeast Atlantic Norwegian Sea Technical University of Denmark: DTU Orbit Norwegian Sea ICES Journal of Marine Science 81 3 600 615 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Conditioning factor Global warming Histology Macroscopic maturity Northeast Atlantic mackerel Spawning extension Stock size |
spellingShingle |
Conditioning factor Global warming Histology Macroscopic maturity Northeast Atlantic mackerel Spawning extension Stock size Schmidt, T. C. dos Santos Slotte, A. Olafsdottir, A. H. Nøttestad, L. Jansen, T. Jacobsen, J. A. Bjarnason, S. Lusseau, S. M. Ono, K. Holleland, S. Thorsen, A. Sando, A. B. Kjesbu, O. S. Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
topic_facet |
Conditioning factor Global warming Histology Macroscopic maturity Northeast Atlantic mackerel Spawning extension Stock size |
description |
The Northeast Atlantic mackerel is an income breeder with indeterminate fecundity, spawning in multiple batches at optimal temperatures around 11°C in the upper water column during February–July along the continental shelf from 36–62°N. Based on macroscopic staging of gonads (N ∼62000) collected in 2004–2021, we detected an on-going extension of spawning activities into the Norwegian Sea feeding area (62–75°N), reaching stable levels around 2012 onwards. This poleward expansion increased as more fish entered the area, whilst the maximum proportions of spawners concurrently dropped from about 75 to 15% from May to July. Detailed histological examinations in 2018 confirmed the macroscopic results but clarified that 38% of the spawning-capable females in July terminated their spawning by atresia. We suggest that increased access to suitable spawning areas (≥10°C), following ocean warming from 2002 onwards, functions as a proximate cause behind the noticed expansion, whereas the ultimate trigger was the historic drop in body growth and condition about 10 years later. Driven by these energetic constraints, mackerel likely spawn in the direction of high prey concentrations to rebuild body resources and secure the future rather than current reproduction success. The ambient temperature that far north is considered suboptimal for egg and larval survival. |
format |
Article in Journal/Newspaper |
author |
Schmidt, T. C. dos Santos Slotte, A. Olafsdottir, A. H. Nøttestad, L. Jansen, T. Jacobsen, J. A. Bjarnason, S. Lusseau, S. M. Ono, K. Holleland, S. Thorsen, A. Sando, A. B. Kjesbu, O. S. |
author_facet |
Schmidt, T. C. dos Santos Slotte, A. Olafsdottir, A. H. Nøttestad, L. Jansen, T. Jacobsen, J. A. Bjarnason, S. Lusseau, S. M. Ono, K. Holleland, S. Thorsen, A. Sando, A. B. Kjesbu, O. S. |
author_sort |
Schmidt, T. C. dos Santos |
title |
Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
title_short |
Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
title_full |
Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
title_fullStr |
Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
title_full_unstemmed |
Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
title_sort |
poleward spawning of atlantic mackerel ( scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints |
publishDate |
2024 |
url |
https://orbit.dtu.dk/en/publications/5a3f4381-3b5b-42da-87ec-0d3080e0f37f https://doi.org/10.1093/icesjms/fsad098 https://backend.orbit.dtu.dk/ws/files/359164728/fsad098.pdf |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Northeast Atlantic Norwegian Sea |
genre_facet |
Northeast Atlantic Norwegian Sea |
op_source |
Schmidt , T C D S , Slotte , A , Olafsdottir , A H , Nøttestad , L , Jansen , T , Jacobsen , J A , Bjarnason , S , Lusseau , S M , Ono , K , Holleland , S , Thorsen , A , Sando , A B & Kjesbu , O S 2024 , ' Poleward spawning of Atlantic mackerel ( Scomber scombrus ) is facilitated by ocean warming but triggered by energetic constraints ' , ICES Journal of Marine Science , vol. 81 , no. 3 , fsad098 , pp. 600-615 . https://doi.org/10.1093/icesjms/fsad098 |
op_relation |
https://orbit.dtu.dk/en/publications/5a3f4381-3b5b-42da-87ec-0d3080e0f37f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/icesjms/fsad098 |
container_title |
ICES Journal of Marine Science |
container_volume |
81 |
container_issue |
3 |
container_start_page |
600 |
op_container_end_page |
615 |
_version_ |
1802648059510784000 |