Fine-scale zooplankton distribution within sub-mesoscale features of the South West Indian Ocean


Pavanee Angelee Annasawmy

Project type




Project duration

Start Date

January 31, 2022

End Date

January 30, 2024

The BIENVENÜE postdoctoral project, FINZWIO, looks at the fine-scale distribution of micronekton and will help in our understanding of why sub-mesoscale structures are attractive sites for lower trophic level organisms and subsequently for higher trophic level consumers which support local fisheries. A wide range of physical and biological instruments were used during the RESILIENCE cruise ( to sample oceanic fronts and the Durban cyclonic eddy. During FINZWIO, I will integrate acoustic data collected during RESILIENCE with a SIMRAD EK80 echosounder at 5 frequencies (18, 38, 70, 120, 200 kHz), and an AZFP (Acoustic Zooplankton and Fish Profiler) at 4 additional frequencies (200, 455, 769 and 200 kHz), along with physical oceanographic data (temperature, salinity, fluorescence and current) from CTD, MVP (Moving Vessel Profiler) and ADCP (Acoustic Doppler Current Profiler), and satellite data (sea surface chlorophyll, sea surface temperature, and absolute dynamic topography) to investigate the biophysical coupling across these sub-mesoscale structures.

The team

Laboratory Members


Pierrick Penven (LOPS)
Steven Herbette (LOPS)
Jean-François Ternon (MARBEC)