Main drivers of spatial change in the biomass of commercial species between summer and winter in the NW Mediterranean Sea

There is a general lack of information related to the spatial structure and functioning marine ecosystems considering seasonality. Here, we modeled biomass distribution eight commercial species in northwestern Mediterranean Sea during winter summer. We hypothesised that seasonal differences water column heterogeneity oceanographic conditions study area could result variations on distributions. employed Bayesian hierarchical modelling approach (B-SDM) with data from two experimental trawl surveys analyse which are significant drivers each season. Our results showed bathymetry, temperature fishing patterns important variables explaining Furthermore, found differentiation for all studied species. provide essential knowledge about distributions key Sea, management implications. • Clear observed between species-specific combination The functional relationship predicted explanatory varies This one few studies account seasonality NW using B-SDM.