The number of inhabitants according to official statistics by age group (<20 years, >=65 years, >=80 years) and by administrative entity (region, province, district and municipality) for Flanders and the Brussels Capital Region

Population density and area of administrative entities (region, province, district and municipality) for Wallonia

Like all EU Member States, France is obliged to collect and manage the data necessary to conduct the Common Fisheries Policy to assess the abundance and distribution of stocks. A "national multi-annual basic data collection programme" has therefore been set up in which scientific campaigns such as IBTS are integrated. This campaign is carried out in coordination with most of the countries bordering the North Sea, in the framework of the European Fisheries Data Collection Programme (DC-MAP). The research carried out over the last few decades has led to a shift away from fisheries issues stricto sensu (monospecific and geographically limited studies) towards a more integrated vision of the various components of marine ecosystems. This openness results from a desire to better understand the dynamics of exploited marine resources in order to improve diagnoses and management recommendations. The acquisition of data from these compartments at different stations makes it possible to establish a map of biotic and abiotic environmental parameters in the Channel and North Sea during the winter period, a period that is usually little studied, but which is crucial.

EVRWE is a multiannual survey with the following objectives: - Building up time series of abundance indices for the main dermersal and benthic species in the Celtic Sea and the Bay of Biscay. - Measuring inter-annual changes in their recruitment. - Mapping the spatial distributions of the species and their inter-annual variations, as well as looking for the origin of this variability (biotic and/or abiotic parameters, fisheries impact). - In the framework of the 'Bay of Biscay' challenge, the data collected are vital for understanding changes in faunal communities.

The number of inhabitants on January 1 according to the official definition of the population, by administrative entity (region, province, district and municipality) for Flanders and the Brussels Capital Region

The average household size of private households by administrative unit (region, province, district and municipality) for Wallonia

CGFS cruise aims to collect basic data to estimate the status of fisheries resources, by direct assessment of stock abundance and distribution, along with biological sampling of commercial catches. The CGFS campaign is carried out within the framework of this programme in the European project Contractualisation of Basic Fishery Data Collection (DCF). The abundance indices collected during this campaign are used by the ICES international working group "Demersal fisheries of the North Sea, Eastern Channel and Skagerrak" and complement the data from the English "Beam Trawl Survey" for the "Flatfish" working group.

The COMOR cruises, which took place on the Thalia, aim to assess the abundance of the scallop stock (and if necessary to determine the presence of toxic algae) in the Seine Bay.

The number of inhabitants according to official statistics per age group of 5 years and gender by administrative entity (region, province, district and municipality) for Wallonia