Inulin and fructooligosaccharides effects on chronic stress response of pikeperch juveniles (Sander lucioperca)

• Main Authors: Abraham BAULU, Robert MANDIKI
• Format: Article
• Language: English
• Published: Institut Agronomique et Vétérinaire Hassan II 2020-03-01
• Series: Revue Marocaine des Sciences Agronomiques et Vétérinaires
• Subjects: sander lucioperca; inulin; fructooligosaccharide; exondation stress; cortisol; glucose
• Online Access: https://agrimaroc.org/index.php/Actes_IAVH2/article/view/782

The goal of this study is to evaluate the effect of the inulin and fructooligosaccharides on growth and response to chronic stress of pikeperch juveniles (Sander lucioperca). Four treatments of two rates (10 and 20 g/kg of food) of these two feed additives were tested in three replicates using experimental feed granules on fishes of medium initial weight of 14,6 ± 0,4 g by and comparing them to two control groups (stress and no stress controls). For all treatments, the feed is composed of animal and vegetal meal having protein and fat contents of respectively 40,1 and 12,0%. As the goal was to evaluate if administration a prebiotic could limit the effects of chronic stress, the first stress was applied at day 7, and every week thereafter up to day 36, a total of five manipulations of pond drying. After 36 days of feeding, growth and physiological parameters were assessed. Comparatively to control fish, pond drying stress had no significant effect on fish growth rate. However, significant differences were observed at additive rate of 20 gr per kg the food (20 gr/kg) in treatment IN2 with values of GP (%) and SGR (%/day) that were higher than in others treatments. The level of cortisol was also higher of the stressed controls when compared to all other group, even those fed with prebiotics. Prebiotics had however significantly limited the increase in cortisol indicating their positive effect on stress response. From the results, other studies should test additional rates of probiotics to determine the optimal rate of prebiotics in the feed of pikeperch juveniles to limit the effects of stress.