Analysis and visualization of the glass eel behavior (Anguilla anguilla) in the Adour estuary and estimate of its upstream migration speed. - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Aquatic Living Resources Année : 2009

Analysis and visualization of the glass eel behavior (Anguilla anguilla) in the Adour estuary and estimate of its upstream migration speed.

Elise Duquesne
  • Fonction : Auteur
Ahmed Boussouar
  • Fonction : Auteur

Résumé

The studies carried out on the Adour estuary on the migration of glass eels lead to the characterisation of their swimming behavior. Individuals migrate passively with the flood tide current behind the dynamic tide front, and their movements into the water column are linked to the surrounding luminosity and water turbidity. A numerical model was built from observations gathered on glass eel densities during scientific surveys. It uses the outputs of a hydrodynamic model accounting for the variations in the river flow and tide coefficient. It allows the simulation of the displacement of a particle in the longitudinal axis of the estuary. The variation of the vertical movements through the water column takes into account the cloud cover, the moon phases, the alternation of days and nights and the water turbidity. The results allow displaying the migration speed of groups of glass eels entering the Adour estuary. These simulations are validated by the comparison with in situ observations and the outputs of the behavioral model make possible, on the one hand, to simulate the migration speed of glass eels according to hydrological data and, on the other hand, to define the environmental conditions that stop or slow down their displacement into the estuary.

Dates et versions

hal-00586800 , version 1 (18-04-2011)

Identifiants

Citer

Patrick Prouzet, Marc Odunlami, Elise Duquesne, Ahmed Boussouar. Analysis and visualization of the glass eel behavior (Anguilla anguilla) in the Adour estuary and estimate of its upstream migration speed.. Aquatic Living Resources, 2009, 22 (4), pp.525-534. ⟨10.1051/alr/2009041⟩. ⟨hal-00586800⟩
117 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More