The scientific species repository of the Fisheries Information System lists the species observed during fishing campaigns or within the framework of the observations of collection programmes (ObsVentes, ObsMer, Campaigns, etc.).

Size-weight relationships are specific to each scientific species and its environment. They allow the size of an individual to be determined from its weight or vice versa. These relationships are established statistically from a sample of individuals representative of the species.

ObsBio, the collection of individual biological parameters such as size, weight, sex, age are necessary data to know by elevation, the share of the populations in the recruitment of young fish, in the natural mortality and in the mortality by fishing

The collection of socio-economic data from professional fishermen makes it possible to calculate economic indicators by fleet segment and contributes in particular to evaluating the economic performance of each fleet and the impacts of the implementation of management measures. It also makes it possible to evaluate the weight of French fishing in Europe, the share of fishing in the national and regional economy as well as the attractiveness of the profession and the impact of cost variations such as the cost of fuel.

A metier in the Fisheries Information System is a fishing practice defined by a fishing gear and a target species. They are used for statistical purposes to evaluate fishing strategies and efforts.

Avant le 1er janvier 2016, la France comptait 27 régions : - 22 régions en France métropolitaine (en comptant la Corse). - 5 régions d'outre mer : la Guadeloupe, la Martinique, la Guyane, la Réunion et Mayotte (depuis 2011). Bien qu'obsolète, ce référentiel est conservé dans le Système d'Informations Halieutiques pour les données historiques.

The MFSP repository of the Fisheries Information System corresponds to the combination of Parameters, Supports, Fractions, Methods and Units. It allows variables to be entered, banked and retrieved. It is associated with many other repositories: species, gear, etc.

The repository of commercially exploited species of interest in the Fisheries Information System is based on the FAO's ASFIS repository enriched with species of high commercial interest in France (metropolitan and overseas).

For some commercial species, coefficients called live weight equivalents allow the live weight of the fish to be calculated from the weight recorded on landing, or from the net weight of the various processed products prepared on board or in factories located on the coast.

The gear repository of the Fisheries Information System includes, on the one hand, the FAO fishing gears enriched with national specificities and, on the other hand, the sampling gears used during the fisheries surveys conducted by Ifremer and its partners.