Raw underway marine gravity data from the French civil Research vessels and archived at SISMER (IFREMER)

Raw seismic reflexion data collected on board of the French oceanographic fleet managed by IFREMER and archived at SISMER.

Sidescan sonar data of the French Research Vessels, archived at SISMER (IFREMER)

The data are provided as a layer of points representing the benthic samples (operations) in the French Mediterranean. The lists of species identified corresponding to these sampling points are given in the bibliographic references indicated in the layer.

Since 2001, an annual stock assessment of Manila (Ruditapes philippinarum) and European (Ruditapes decussatus) clams has been carried out in March in the Gulf of Morbihan and the Noyalo River. The objectives of this survey are : 1) estimate by direct assessment, the biomass of the stock and its geographical distribution; 2) estimate the exploitable biomass and exploitation potential for the sampled sites in particular, in areas reserved for professional fishing; 3) to establish a diagnosis, with a medium-term vision, on the state of the stock; 4) to propose the implementation of appropriate management measures. Two cruises were also carried out in 1996 and 1997.

Multibeam echosounder data from the French civil Research vessels, archived at SISMER (IFREMER)

The data is provided as a layer of points representing the samples taken (operations) in the French Mediterranean. The lists of species identified corresponding to these sample points are in the Biocean database.

The objective of this cruise, which has been taking place in the English Channel - Baie de somme since 1980, over 5 days in September, is to evaluate the natural multi-year fluctuations of the stands and to analyze the possible impact of the nuclear power plant on the marine environment and resources. It makes it possible to determine annual indices of abundance and distribution of flatfish and other species (shrimp, pout, whiting).

The aim of these cruises, which took place on the Thalia, was to evaluate the abundance of the scallop stock in the Charentais channels.

Raw underway marine magnetic data collected on board of the French civil Research vessels and archived at SISMER (IFREMER)