Fishing operation (with netting) whose duration depends on the human resources and equipment used and on the surface and depth of the body of water. On-site measurements are performed to know the environmental conditions and to better estimate the fishing results. The fishing season includes all concepts and information considered stable during a sample campaign: one or more consecutive nights or days depending on the protocols, the size, depth and diversity of habitats in the body of water. It allows specifying the following pieces of information: the fishing protocol used (currently there are only two published protocols and therefore usable: (i) the vertical fishing nets used since the 1990s, (ii) the multi-mesh nets described in the prEN 14757 /2003
Set of microscopic plant organisms that live in suspension in water (algae ...). Phytoplankton is the first link in the food chain in the marine ecosystem. There are approximately 4,000 phytoplankton species worldwide. Some of them can proliferate significantly by forming red, brown or green waters, other species are toxic but most of them are completely harmless.
All sampling actions in an aquatic environment, which are conducted on a measuring station and at a given moment, in order to know and follow the fish populations.