State-dependent Energy Allocation in Cod (Gadus Morhua)
Growth and maturation are processes that are tuned to the external environment 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 ho...
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ftiiasalaxenburg:oai:pure.iiasa.ac.at:7775 2023-05-15T14:30:27+02:00 State-dependent Energy Allocation in Cod (Gadus Morhua) Joergensen, C. Fiksen, O. 2005-12 text https://pure.iiasa.ac.at/id/eprint/7775/ https://pure.iiasa.ac.at/id/eprint/7775/1/IR-05-067.pdf en eng IR-05-067 https://pure.iiasa.ac.at/id/eprint/7775/1/IR-05-067.pdf Joergensen, C. & Fiksen, O. (2005). State-dependent Energy Allocation in Cod (Gadus Morhua). IIASA Interim Report. IIASA, Laxenburg, Austria: IR-05-067 Monograph NonPeerReviewed 2005 ftiiasalaxenburg 2023-04-07T14:47:53Z Growth and maturation are processes that are tuned to the external environment 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 individuals age, body length, stored energy, and the state of the environment. Allocation and the physiological processes of growth, storing energy, and reproduction are modelled mechanistically. The model is parameterised for Atlantic cod (Gadus morhua); more specifically for 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. Book Arctic cod Arctic atlantic cod Gadus morhua Northeast Arctic cod IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) Arctic |
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IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) |
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ftiiasalaxenburg |
language |
English |
description |
Growth and maturation are processes that are tuned to the external environment 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 individuals age, body length, stored energy, and the state of the environment. Allocation and the physiological processes of growth, storing energy, and reproduction are modelled mechanistically. The model is parameterised for Atlantic cod (Gadus morhua); more specifically for 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 |
Book |
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 |
IR-05-067 |
publishDate |
2005 |
url |
https://pure.iiasa.ac.at/id/eprint/7775/ https://pure.iiasa.ac.at/id/eprint/7775/1/IR-05-067.pdf |
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 |
https://pure.iiasa.ac.at/id/eprint/7775/1/IR-05-067.pdf Joergensen, C. & Fiksen, O. (2005). State-dependent Energy Allocation in Cod (Gadus Morhua). IIASA Interim Report. IIASA, Laxenburg, Austria: IR-05-067 |
_version_ |
1766304299856429056 |