Processed outputs from a Lagrangian dispersal experiment testeing the effect of diel vertical migration in the Tropical Southwestern Atlantic

Tosetto Everton, Lett Christophe, Bertrand Arnaud


Description: We used the Lagrangiandispersal modelling tool Ichthyop (Lett et al. 2008) to track particles representing numerical larvae passively transported by current velocity fields in the Tropical Southwestern Atlantic. In the simulations, particles were classifyed according to biological traits (planktonic life duration - PLD and diel vertical migration behaviour - DVM) and spawning habitat. Simulations were run monthly from January 2009 to December 2017 (108 runs). The study domain was split into 56 cells of similar area (Fig. 1). In each run, for each category of particles, 500 particles per cell were released randomly between the surface and 80 m depth. Their trajectories were then followed for maximum larval duration. Recruitment occurred when a particle reached the minimum age (13 or 25 days) and crossed any recruiting cell over seamounts or islands. The data are the processed outputs of the model indicanting the number of particles of each catergory that recruited in each recruitment zone (Fig. 1) in each month.