Translate the following English sentence to French:
"It is not just a question of how many fish are to be obtained for how much money, but also about employing the precautionary principle to achieve the sustainable use of fisheries resources."
La question n'est pas seulement de déterminer le tonnage et sa contrepartie financière mais, bien au-delà, de parvenir à une exploitation durable des ressources piscicoles, conformément au principe de précaution.