In this WP, we want to address 2 questions:
(a) How do larval and juvenile densities vary in time and space?
(b) How to set up an additional recruitment survey to complement the NOURSOM survey?
Exisiting data on juveniles densities along the EEC coast will be re-analysed to define optimal areas to sample on a regular basis.
Surveys will be carried out in Septembre-Octobre 2016 and 2017 on fishing boats, and a protocol will be proposed for further funding beyond that 2 year period.
In 2017, a survey will be carried out in spring on a research vessel to sample eggs and larvae to estimate their distribution and abundance and map spawning areas. The collected data will be compared to previous data from 1995.