Résumé
Fisheries scientists and managers are recurrently faced with the challenge of modeling the linkage between fishing effort and fishing mortality. A classical approach to improve this linkage is to adjust, for each stock being investigated, nominal fishing effort (e.g. time spent fishing) by the estimated fishing power. Fishing power is typically estimated, for each stock, as a linear function of available physical characteristics of vessel and gear. This approach however has two important limitations. First, shifts in fishing tactics are not considered when adjusting fishing effort. Second, the linkage between fishing effort and mortality is usually examined for each stock independently. Given most fish species are harvested by mixed fisheries, approaching the linkage between fishing effort and mortality on a single-species basis is of limited interest for fisheries managers. This paper aims at improving the linkage between fishing mortality and fishing effort concomitantly for the main stocks harvested by a selection of important European fleets, by adjusting fishing effort using a selection of fishing tactics and strategies indicators.