The Transport Of Anchovy Larvae And Juveniles Across The Bay Of Biscay Studied Using Otolith Increments And A 3d Hydrodynamic Model ...

• Main Authors: Allain, G., Petitgas, P., Lazure, P., Grellier, P.
• Format: Conference Object
• Language: unknown
• Published: ASC 2001 - W - Theme session 2024
• Subjects: Oceanic Northeast Atlantic ICES Ecoregion; Ecosystem observation, processes and dynamics; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.25636323; https://ices-library.figshare.com/articles/conference_contribution/The_Transport_Of_Anchovy_Larvae_And_Juveniles_Across_The_Bay_Of_Biscay_Studied_Using_Otolith_Increments_And_A_3d_Hydrodynamic_Model/25636323

No abstracts are to be cited without prior reference to the author.Anchovy Engraulis encrasicolus concentrates in the SE corner of the Bay of Biscay during the spawning season from May to July, especially in the plumes of the French rivers Gironde and Adour. In autumn, juveniles are found dispersed in many different habitats, off the French and Spanish coasts, outside the shelf break and in a larger box than the SE corner of the Bay. A 3D hydrodynamic model capable of reliably simulating the flow field in the surface layers was developed by IFREMER. It was used as a first fisheries application to simulate the transport processes affecting Biscay anchovy from the egg to the juvenile stages in 1999. Juveniles were collected in different sites during a survey in September 1999. Their birth-dates were estimated by interpreting the otolith increments. Virtual buoys were released on the grid of the hydrodynamic model at the birth-dates and their trajectories were tracked. The buoys that were found close to the ...