SYNTHESIS OF MODELIZATION CONCEPTS OF MIG RATION PHENOMENA OF EEL CIVELLES (ANGUILLA-ANGUILLA, L 1758) IN ESTUARY

We realized a review of the existent estuarine migration models for ee l civelles (Anguilla anguilla L.). It shows that most of them focus on the factors involved in the models (temperature, waterflow, tide coef ficient). But some differences exist in the relationships (linear or l ogistic) which link the parameters to the daily CPUE from the commerci al fishery. Among the different models, there is not a single migratio n pattern for modelisation. It seems essential, in order to enhance th e accuracy of the model, to engage a reflection on the variability and the significance of the CPUE. We noticed insufficient consideration t o the individual variability of the eel civelle itself.