State-dependent energy allocation in cod (Gadus morhua)
Growth and maturation are processes that are tuned to the external environment that an individual is likely to experience, where food availability, the mortality regime, and events necessary to complete the life cycle are of special importance. Understanding what influences life history strategies a...
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ftiiasalaxendare:oai:pure.iiasa.ac.at:7899 2023-05-15T14:30:27+02:00 State-dependent energy allocation in cod (Gadus morhua) Joergensen, C. Fiksen, O. 2006-01 http://pure.iiasa.ac.at/id/eprint/7899/ unknown NRC Research Press Joergensen, C. & Fiksen, O. (2006). State-dependent energy allocation in cod (Gadus morhua). Canadian Journal of Fisheries and Aquatic Sciences 63 (1) 186-199. 10.1139/f05-209 <https://doi.org/10.1139/f05-209>. Article PeerReviewed 2006 ftiiasalaxendare 2022-04-15T12:32:21Z Growth and maturation are processes that are tuned to the external environment that an individual is likely to experience, where food availability, the mortality regime, and events necessary to complete the life cycle are of special importance. Understanding what influences life history strategies and how changes in life history in turn influence population dynamics and ecological interactions are crucial to our understanding of marine ecology and contemporary anthropogenic induced change. We present a state-dependent model that optimises life-long energy allocation in iteroparous fish. Energy can be allocated to growth or reproduction and depends in the individual's age, body length, and stored energy and the state of the environment. Allocation and the physiological processes of growth, energy storage, and reproduction are modelled mechanistically. The model is parameterised for Atlantic cod (Gadus morhua), more specifically the Northeast Arctic cod stock. Growth and maturation predicted by the model fit well with field observations, and based on a further investigation of cod reproduction in the model, we conclude that the model has the ability to recapture complex life history phenomena, e.g., indeterminate growth and skipped spawning, and therefore provides an important tool that can improve our understanding of life history strategies in fish. Article in Journal/Newspaper Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis) Arctic |
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IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis) |
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ftiiasalaxendare |
language |
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description |
Growth and maturation are processes that are tuned to the external environment that an individual is likely to experience, where food availability, the mortality regime, and events necessary to complete the life cycle are of special importance. Understanding what influences life history strategies and how changes in life history in turn influence population dynamics and ecological interactions are crucial to our understanding of marine ecology and contemporary anthropogenic induced change. We present a state-dependent model that optimises life-long energy allocation in iteroparous fish. Energy can be allocated to growth or reproduction and depends in the individual's age, body length, and stored energy and the state of the environment. Allocation and the physiological processes of growth, energy storage, and reproduction are modelled mechanistically. The model is parameterised for Atlantic cod (Gadus morhua), more specifically the Northeast Arctic cod stock. Growth and maturation predicted by the model fit well with field observations, and based on a further investigation of cod reproduction in the model, we conclude that the model has the ability to recapture complex life history phenomena, e.g., indeterminate growth and skipped spawning, and therefore provides an important tool that can improve our understanding of life history strategies in fish. |
format |
Article in Journal/Newspaper |
author |
Joergensen, C. Fiksen, O. |
spellingShingle |
Joergensen, C. Fiksen, O. State-dependent energy allocation in cod (Gadus morhua) |
author_facet |
Joergensen, C. Fiksen, O. |
author_sort |
Joergensen, C. |
title |
State-dependent energy allocation in cod (Gadus morhua) |
title_short |
State-dependent energy allocation in cod (Gadus morhua) |
title_full |
State-dependent energy allocation in cod (Gadus morhua) |
title_fullStr |
State-dependent energy allocation in cod (Gadus morhua) |
title_full_unstemmed |
State-dependent energy allocation in cod (Gadus morhua) |
title_sort |
state-dependent energy allocation in cod (gadus morhua) |
publisher |
NRC Research Press |
publishDate |
2006 |
url |
http://pure.iiasa.ac.at/id/eprint/7899/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod |
genre_facet |
Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod |
op_relation |
Joergensen, C. & Fiksen, O. (2006). State-dependent energy allocation in cod (Gadus morhua). Canadian Journal of Fisheries and Aquatic Sciences 63 (1) 186-199. 10.1139/f05-209 <https://doi.org/10.1139/f05-209>. |
_version_ |
1766304301036077056 |