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

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

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.

Raw singlebeam 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.

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

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

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

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.

The 62 RESSGASC campaigns allow the quarterly assessment of the quantities of various species (hake, sole, Norway lobster, etc.) discarded by fishing vessels (individuals below legal landing size). This information, together with data collected from the demographic structure of landings (using samples from auctions), is essential for the evolution of commercial fish stocks.