Estimates of the sardine spawning stock biomass off the Galician and Cantabrian coasts

From the months of April to May, a simultaneaus daily egg production method and acoustic surveys were carried out off the Ga1ician and Cantabrian shelf waters for the purpose of sardine spawning biomass estimation. These surveys, were coordinated on a temporal-spatial scale using two ships, the R/V "Investigador S." doing the egg survey and R/V "Ignat Pavlyunchenkov", the acoustic tracking. The present document presents the results of sardine biomass estimates from the respective stock evaluation techniques applied: DEPM and acoustics, and analyzes comparatively the results of both approaches