Influence du jeune sur la quantité de proies consommées chez la sole Solea senegalensis, Kaup. et le loup Dicentrarchus labrax L

Abstract

Starvation is an important trophic parameter in larval fish rearing. In this study, we propose to follow the prey evolution (Artemia nauplii) in the digestive tract of sole Solea senegalensis and sea bass Dicentrarchus labrax larvae aged respectively 17 and 40 days. The principle is to submit lots of sole and sea bass to different starvation periods (3 to 96 hours). 2 hours after food distribution (ad libitum), 7 to 11 larvae are skimmed off to count the prey number in the digestive tract. We concluded for the 2 species: larvae tolerate long starvation period but they are subjected to high mortality: starvation influences digestibility more than capacity or activation of consumption preys