Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon
The completion of maturation in Atlantic salmon (Salmo salar) depends on environmental conditions that affect both feeding opportunities and growth, which would provide sufficient lipid stores for reproduction. However, if the level of energy reserves of a given fish is below a certain genetic thres...
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ftimr:oai:imr.brage.unit.no:11250/102590 2023-05-15T15:31:32+02:00 Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon Otero, Jaime Jensen, Arne J. L’Abée-Lund, Jan Henning Stenseth, Nils Christian Storvik, Geir Vøllestad, Leif Asbjørn 2010 application/pdf http://hdl.handle.net/11250/102590 eng eng ICES ICES CM documents;2010/S:13 This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/102590 28 s. maturation modning salmon laks environmental aspects miljøforhold VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Working paper 2010 ftimr 2021-09-23T20:16:01Z The completion of maturation in Atlantic salmon (Salmo salar) depends on environmental conditions that affect both feeding opportunities and growth, which would provide sufficient lipid stores for reproduction. However, if the level of energy reserves of a given fish is below a certain genetic threshold at a critical decision time further gonadal development is arrested and fully maturation postponed. This individual development pattern suggests that the proportion of fish maturing at a given sea age could vary from year to year according to the feeding opportunities in the oceanic migratory habitat, and the growth rate during freshwater residence that might be associated with growth at sea. In this study we show that sea age at maturity of adults caught in multiple Norwegian rivers has increased with increasing sea surface temperature (SST) experienced by the fish in autumn months during their first year at sea. Furthermore, freshwater conditions measured by river discharge during summer months one year ahead of seaward migration is positively related with increasing sea age at maturity. This result is discussed within the broad changes occurring in the North-east Atlantic pelagic food web mostly related with the current ocean warming, and river conditions influencing growth rates. Report Atlantic salmon North East Atlantic Salmo salar Institute for Marine Research: Brage IMR |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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language |
English |
topic |
maturation modning salmon laks environmental aspects miljøforhold VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
spellingShingle |
maturation modning salmon laks environmental aspects miljøforhold VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Otero, Jaime Jensen, Arne J. L’Abée-Lund, Jan Henning Stenseth, Nils Christian Storvik, Geir Vøllestad, Leif Asbjørn Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon |
topic_facet |
maturation modning salmon laks environmental aspects miljøforhold VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
description |
The completion of maturation in Atlantic salmon (Salmo salar) depends on environmental conditions that affect both feeding opportunities and growth, which would provide sufficient lipid stores for reproduction. However, if the level of energy reserves of a given fish is below a certain genetic threshold at a critical decision time further gonadal development is arrested and fully maturation postponed. This individual development pattern suggests that the proportion of fish maturing at a given sea age could vary from year to year according to the feeding opportunities in the oceanic migratory habitat, and the growth rate during freshwater residence that might be associated with growth at sea. In this study we show that sea age at maturity of adults caught in multiple Norwegian rivers has increased with increasing sea surface temperature (SST) experienced by the fish in autumn months during their first year at sea. Furthermore, freshwater conditions measured by river discharge during summer months one year ahead of seaward migration is positively related with increasing sea age at maturity. This result is discussed within the broad changes occurring in the North-east Atlantic pelagic food web mostly related with the current ocean warming, and river conditions influencing growth rates. |
format |
Report |
author |
Otero, Jaime Jensen, Arne J. L’Abée-Lund, Jan Henning Stenseth, Nils Christian Storvik, Geir Vøllestad, Leif Asbjørn |
author_facet |
Otero, Jaime Jensen, Arne J. L’Abée-Lund, Jan Henning Stenseth, Nils Christian Storvik, Geir Vøllestad, Leif Asbjørn |
author_sort |
Otero, Jaime |
title |
Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon |
title_short |
Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon |
title_full |
Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon |
title_fullStr |
Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon |
title_full_unstemmed |
Contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in Atlantic salmon |
title_sort |
contemporary ocean warming and freshwater conditions contribute to delay the completion of maturation in atlantic salmon |
publisher |
ICES |
publishDate |
2010 |
url |
http://hdl.handle.net/11250/102590 |
genre |
Atlantic salmon North East Atlantic Salmo salar |
genre_facet |
Atlantic salmon North East Atlantic Salmo salar |
op_source |
28 s. |
op_relation |
ICES CM documents;2010/S:13 This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/102590 |
_version_ |
1766362066582503424 |