Community Research and Development Information Service - CORDIS


CODYSSEY Report Summary

Project ID: Q5RS-2002-00813
Funded under: FP5-LIFE QUALITY
Country: United Kingdom

A individual based model predicting the vertical distribution of cod

Two individual based models (IBMs) have been developed. The first is an IBM of cod vertical migration strategies, which incorporates a bioenergetic swim-bladder model. The model finds optimal tilt angles and swimming speed given the buoyancy of the fish, and implements the effect of behavioural drivers using a genetic algorithm. Simulations and sensitivity analysis with different environmental forcing have been performed and the predicted vertical migration patterns have been compared to various observations and data obtained from DTS tagged cod in the Barents Sea. Work is ongoing to parameterise the model for other ecosystems to provide a comparative analysis.

A second predator-prey IBM was developed to investigate the effects of prey density and relative value on the proportion of time that cod spend in the pelagic vs benthic water layers. The description of the IBM in general and the first major findings has now been submitted for publication in Bulletin of Mathematical Biology.


David RIGHTON, (Project Coordinator)
Tel.: +44-0150-2562244
Fax: +44-0150-2513865
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