Analysis of daily catch series and definition of a first model of civelles (Anguila anguilla L. 1758) penetration in the mower estuary of Gironde (France)

The objective of this study is to determine the general features of civelle migration in Gironde estuary from CPUE time series collected from the more cooperative professional fishermen daily reports. We use spectral method and multivariate analyses to strengthten previous results. This phenomenon i...

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Bibliographic Details
Main Authors: Lambert, P., Gramaglia, A., Rochard, E., Elie, P.
Other Authors: CEMAGREF BORDEAUX APBX
Format: Conference Object
Language:English
Published: 1994
Subjects:
ANGUILLA ANGUILLA
ANGUILLIDAE
MIGRATION ANADROME
CIVELLE
CAPTURE PAR UNITE D'EFFORT
MODELISATION
EELS
MODELLING
Anguilla anguilla
Online Access:https://irsteadoc.irstea.fr/cemoa/PUB00008527
Description
Summary:The objective of this study is to determine the general features of civelle migration in Gironde estuary from CPUE time series collected from the more cooperative professional fishermen daily reports. We use spectral method and multivariate analyses to strengthten previous results. This phenomenon is influenced not only by tide coefficient (migration vector), but also by temperature and freshwater flow (migration inhibitor). A first modelisation is attempted with a simplistic reactor including a cryptical stock on estuary bottom. The tide coefficients action are approximated by a linear function, the temperature and the flow by logistic functions.

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