With this viewer you can access the sampling and scientific monitoring data of the commercial bottom trawl fishing fleet collected since January 2019. The information for each sampling trawl carried out within the monitoring program includes:

• Date (year and season)
• Name of the port and GPS location of the fishing
• Catch composition by fraction (commercial, discard, natural debris and marine litter) and at the highest possible level of detail.

You can compare the composition of the catch in the different ports and areas (North: from Roses to Arenys de Mar; Center: from Barcelona to Tarragona; and South: from L’Ametlla de Mar to La Ràpita). The commercial fraction of the catch includes species that are sold at the fish auction, the discard fraction includes both species of no commercial interest and individuals of commercial species that are too small to be sold, natural debris refer to matter of natural origin, and marine litter is the remains of anthropogenic origin that have been found in the nets. Within each category, a classification is presented in as much detail as possible.

On the other hand, size distributions of the target species are presented in aggregate (using all our data available so far). In these graphs, you can see the abundance of each size of the following species: hake, blue and red shrimp, spottail mantis shrimp, Norway lobster, deep-water rose shrimp and horned octopus.

In the sampling map, you can visualize each sampling we have carried out and add layers with the following information:

• The fishing effort of the bottom trawl fleet, i.e., fishing hours per km2
• The commercialized biomass, i.e., weight of species caught and commercialized per km2
• Economic yield, i.e., euros of biomass commercialized per km2

Ocean physical variables such as surface temperature or chlorophyll concentration, derived from satellites via the European Earth observation programme, Copernicus (www.copernicus.eu).