Modelling copepod development: current limitations and a new realistic approach
<qd> Gentleman, W. C., Neuheimer, A. B., and Campbell, R. G. 2008. Modelling copepod development: current limitations and a new realistic approach. – ICES Journal of Marine Science, 65: 399–413. </qd>To predict the influence of environmental variability on copepod dynamics and production...
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fthighwire:oai:open-archive.highwire.org:icesjms:65/3/399 2023-05-15T15:48:01+02:00 Modelling copepod development: current limitations and a new realistic approach Gentleman, W. C. Neuheimer, A. B. Campbell, R. G. 2008-04-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/65/3/399 https://doi.org/10.1093/icesjms/fsn047 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/65/3/399 http://dx.doi.org/10.1093/icesjms/fsn047 Copyright (C) 2008, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2008 fthighwire https://doi.org/10.1093/icesjms/fsn047 2008-05-01T04:57:29Z <qd> Gentleman, W. C., Neuheimer, A. B., and Campbell, R. G. 2008. Modelling copepod development: current limitations and a new realistic approach. – ICES Journal of Marine Science, 65: 399–413. </qd>To predict the influence of environmental variability on copepod dynamics and production, models must account for the effects of temperature and food on stage-dependent time-scales. Here, data for development-time means and variance of Calanus finmarchicus are used to quantify the limitations of existing models. Weight-based individual models are sensitive to uncertain parameters, such as moulting weights, assimilation efficiency, and environmental dependencies, making them highly difficult to calibrate. The accuracy of stage-based population models using ordinary differential equations depends on model structure, with some predicted generation times being incorrect by months. Even when large numbers of age classes are used to reduce modelled variability, it is not possible to make variability consistent with the data. Accuracy of mean times for stage-based population models using difference equations requires a small time-step, which results in large numbers of age classes and modelled variability that is underestimated by orders of magnitude, unless a probabilistic moult fraction is used. We present a new stage-based individual model that avoids the limitations of other models and successfully represents C. finmarchicus mean development timing and associated variability. This approach can be adapted easily for other species, as well as dynamic environmental conditions. Text Calanus finmarchicus HighWire Press (Stanford University) ICES Journal of Marine Science 65 3 399 413 |
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Articles Gentleman, W. C. Neuheimer, A. B. Campbell, R. G. Modelling copepod development: current limitations and a new realistic approach |
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<qd> Gentleman, W. C., Neuheimer, A. B., and Campbell, R. G. 2008. Modelling copepod development: current limitations and a new realistic approach. – ICES Journal of Marine Science, 65: 399–413. </qd>To predict the influence of environmental variability on copepod dynamics and production, models must account for the effects of temperature and food on stage-dependent time-scales. Here, data for development-time means and variance of Calanus finmarchicus are used to quantify the limitations of existing models. Weight-based individual models are sensitive to uncertain parameters, such as moulting weights, assimilation efficiency, and environmental dependencies, making them highly difficult to calibrate. The accuracy of stage-based population models using ordinary differential equations depends on model structure, with some predicted generation times being incorrect by months. Even when large numbers of age classes are used to reduce modelled variability, it is not possible to make variability consistent with the data. Accuracy of mean times for stage-based population models using difference equations requires a small time-step, which results in large numbers of age classes and modelled variability that is underestimated by orders of magnitude, unless a probabilistic moult fraction is used. We present a new stage-based individual model that avoids the limitations of other models and successfully represents C. finmarchicus mean development timing and associated variability. This approach can be adapted easily for other species, as well as dynamic environmental conditions. |
format |
Text |
author |
Gentleman, W. C. Neuheimer, A. B. Campbell, R. G. |
author_facet |
Gentleman, W. C. Neuheimer, A. B. Campbell, R. G. |
author_sort |
Gentleman, W. C. |
title |
Modelling copepod development: current limitations and a new realistic approach |
title_short |
Modelling copepod development: current limitations and a new realistic approach |
title_full |
Modelling copepod development: current limitations and a new realistic approach |
title_fullStr |
Modelling copepod development: current limitations and a new realistic approach |
title_full_unstemmed |
Modelling copepod development: current limitations and a new realistic approach |
title_sort |
modelling copepod development: current limitations and a new realistic approach |
publisher |
Oxford University Press |
publishDate |
2008 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/65/3/399 https://doi.org/10.1093/icesjms/fsn047 |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/65/3/399 http://dx.doi.org/10.1093/icesjms/fsn047 |
op_rights |
Copyright (C) 2008, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsn047 |
container_title |
ICES Journal of Marine Science |
container_volume |
65 |
container_issue |
3 |
container_start_page |
399 |
op_container_end_page |
413 |
_version_ |
1766383019445190656 |