Translate the following English sentence to French:
"We move on to the fishermen who were greatly concerned by the application of this directive to their working life because they felt they would not be able to operate properly within that system."
Nous en venons au cas des pêcheurs qui se sont fortement inquiétés de l'application de cette directive à leur vie professionnelle car ils pensaient ne pas pouvoir travailler convenablement dans ce système.