translate English to French: Observed variation over this period amounted to 8% of the minimum calorific value in the amphipod Gammarus fasciatus (3934–4258 cal/g dry weight), 19.5% of the minimum calorific value in the amphipod Hyallela azteca (3611–4315 cal/g dry weight), 22.4% of the minimum calorific value in the isopods of Asellus spp.
La variation observée durant cette période représente 8% de la valeur calorifique minimale de l'amphipode Gammarus fasciatus (3934–4258 cal/g poids sec), 19.5% de la valeur calorifique minimale de l'amphipode Hyallela azteca (3611–4135 cal/g poids sec), 22.4% de la valeur calorifique minimale des isopodes Asellus spp.