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Aquaculture Studies 2023, Vol 23, Num, 3     (Pages: AQUAST1228)

Combined Effects of Dietary Probiotic Lactobacillus sp. and Prebiotic Glycyrrhizic Acid on Growth Performance, Feed Utilization and Digestive Enzymes Activities of Nile Tilapia (Oreochromis niloticus) Juveniles

Ebru Yılmaz 1 ,Deniz Çoban 1 ,Cüneyt Suzer 2 ,Murat Er 3 ,Onurkan Antepli 2 ,İbrahim Köse 2

1 Aydın Adnan Menderes University, Faculty of Agriculture, Department of Aquaculture and Fisheries, Aydın, Turkey
2 Ege University, Faculty of Fisheries, Aquaculture Department, 35100, Bornova, Izmir, Turkey
3 İzmir Bakırçay University, Menemen Vocational School, Laboratory and Veterinary Health, İzmir, Turkey
DOI : 10.4194/AQUAST1228 Viewed : 77 - Downloaded : 57 The present study investigated the effects of dietary commercial probiotic Lactobacillus sp. and commercial prebiotic glycyrrhizic acid on the growth performance, feed utilization and digestive enzymes activities of Nile tilapia. Seven diets with or without probiotics and prebiotics supple-mentation namely Control (without probiotics and prebiotics), P10, P20 and P30 (Control + Pro-aqua) and V2, V4 and V6 (Control +Viusid) were fed to juvenile Nile tilapia (5.22±0.05 g) for 60 days in triplicate tanks (30 fish per tank). All fish were fed ad libitum three times a day for 60 days. At the end of the experiment, the weight gain and specific growth rate of the fish fed with probiotic content group was found to be higher than the other groups (P<0.05). In the experiment, there was no change in the nutritional value of tilapia fed with a diet containing all feeding groups (P>0.05). On the other hand, significant changes were observed in alkaline and acid protease enzyme activities depending on the days (P<0.05). Especially, after the first 15-day period of the experiments, increases in both supplemented groups enzyme activities were determined. The increase in enzyme activity in the probiotic supplemented groups showed higher activity than the prebiotic administered groups (P<0.05). It can be concluded that probiotic can act as a growth promoter and increase digestive enzymes activity in tilapia. Keywords : Nutrition Growth promoter Immunostimulant