Influence of Dietary Dinamune® on Growth Performance and Lysozyme Activity in Rainbow Trout (Oncorhynchus mykiss) Fry

Sudabeh RAMEZANI; Mehdi SOLTANI; Hosna Gholipour KANANI

Authors

Sudabeh RAMEZANI Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran
Mehdi SOLTANI Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran
Hosna Gholipour KANANI Department of Fisheries, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad

Keywords:

Dinamune, immunostimulant, rainbow trout, Lysozyme

Abstract

This study was conducted to evaluate the effect of a commercial β-glucan based immunostimulant preparation, Dinamune®, in the form of a feed supplement, on the growth performance and lysozyme activity of rainbow trout fry (Oncorhynchus mykiss) weighing 1 g. Fish were fed diets containing 0 (control), 0.5, 1 and 1.5 g Dinamune® kg^-1 of dry diet for a period of 11 weeks. Body weight was generally increased in fish which were fed diets supplemented with concentrations (1.5 Dinamune®/kg feed) (23.75 ± 7.48), compared with the control (21.38 ± 7.04) (p < 0.05). Specific growth rate was significantly (p < 0.05) the highest in 1.5 g Dinamune® kg^-1 of dry diet (4.27 ± 0.40) and the lowest in the control group (4.13 ± 0.41). FCR value was found to be the best in the 1g kg^-1 group (0.67 ± 0.17), followed by the 1.5g kg^-1 group (0.73 ± 0.23), the 0.5 g kg^-1 group (0.80 ± 0.36) and the control group (1.00 ± 0.25). Hepatosomatic index (HSI) showed a significant decrease in 1.5 g Dinamune® kg^-1 of dry diet (0.88 ± 0.18), compared with the control (1.15 ± 0.19). Condition factor (CF) in the control, 0.5 g kg^-1 diet, 1 g kg^-1 diet and 1.5 g kg^-1 diet was (1.30 ± 0.16, 1.34 ± 0.15, 1.19 ± 0.10 and 1.18 ± 0.10) respectively. Lysozyme activity of the liver, kidney, and serum were significantly stimulated in the 0.5, 1 and 1.5 g Dinamune® supplemented groups at the end of experiment, compared with the control (p < 0.05).

doi:10.14456/WJST.2014.77

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