Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod
Environmental variation can cause significant fluctuations in the survival of larval fish and plankton. Understanding these fluctuations is critical for developing more accurate fisheries models, which are needed for both scientific and socioeconomic research. Growth, survival, and dispersal of mari...
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ftrepec:oai:RePEc:oup:beheco:v:20:y:2009:i:3:p:490-500 2024-04-14T08:11:51+00:00 Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod T. Kristiansen C. Jørgensen R. G. Lough F. Vikebø &O. Fiksen http://hdl.handle.net/10.1093/beheco/arp023 unknown http://hdl.handle.net/10.1093/beheco/arp023 article ftrepec 2024-03-19T10:32:00Z Environmental variation can cause significant fluctuations in the survival of larval fish and plankton. Understanding these fluctuations is critical for developing more accurate fisheries models, which are needed for both scientific and socioeconomic research. Growth, survival, and dispersal of marine planktonic larvae rely strongly on their behavior. Larval fish change their vertical positioning due to strong vertical gradients in light, temperature, predation pressure, and prey availability. Here, we explore how various behavioral rules predict vertical distribution, growth, and survival of larval cod (Gadus morhua) in a numerical model. The rules determine the trade-offs between larval growth, feeding rate, and predation rate, including their dependence on gut fullness and body mass. We evaluated the survival through size classes for different rules and random behavior and compared model predictions with observed larval distribution patterns. The rules predicted the correct average depth position with larval size, but failed to predict the timing of the observed vertical distribution pattern. However, model simulations revealed significant increases in survival for larval and juvenile cod with active behavior compared with larvae with random behavior. Behavior was important across all sizes of fish, and this study illustrates the value or added information of incorporating behavior in biophysical models. Copyright 2009, Oxford University Press. Article in Journal/Newspaper Gadus morhua RePEc (Research Papers in Economics) |
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RePEc (Research Papers in Economics) |
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Environmental variation can cause significant fluctuations in the survival of larval fish and plankton. Understanding these fluctuations is critical for developing more accurate fisheries models, which are needed for both scientific and socioeconomic research. Growth, survival, and dispersal of marine planktonic larvae rely strongly on their behavior. Larval fish change their vertical positioning due to strong vertical gradients in light, temperature, predation pressure, and prey availability. Here, we explore how various behavioral rules predict vertical distribution, growth, and survival of larval cod (Gadus morhua) in a numerical model. The rules determine the trade-offs between larval growth, feeding rate, and predation rate, including their dependence on gut fullness and body mass. We evaluated the survival through size classes for different rules and random behavior and compared model predictions with observed larval distribution patterns. The rules predicted the correct average depth position with larval size, but failed to predict the timing of the observed vertical distribution pattern. However, model simulations revealed significant increases in survival for larval and juvenile cod with active behavior compared with larvae with random behavior. Behavior was important across all sizes of fish, and this study illustrates the value or added information of incorporating behavior in biophysical models. Copyright 2009, Oxford University Press. |
format |
Article in Journal/Newspaper |
author |
T. Kristiansen C. Jørgensen R. G. Lough F. Vikebø &O. Fiksen |
spellingShingle |
T. Kristiansen C. Jørgensen R. G. Lough F. Vikebø &O. Fiksen Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
author_facet |
T. Kristiansen C. Jørgensen R. G. Lough F. Vikebø &O. Fiksen |
author_sort |
T. Kristiansen |
title |
Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
title_short |
Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
title_full |
Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
title_fullStr |
Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
title_full_unstemmed |
Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
title_sort |
modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod |
url |
http://hdl.handle.net/10.1093/beheco/arp023 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
http://hdl.handle.net/10.1093/beheco/arp023 |
_version_ |
1796309588612481024 |