The effects of prebiotic isomaltooligosaccharide on some growth factors, survival and resistance to salinity stress of Common carp (Cyprinus carpio) fry

This study investigates the effects of isomaltooligosaccharide as prebiotic on some growth factors, survival, and resistance to salinity stress of Common carp (Cyprinius carpio) fry. Fish (average weight of 6.13±0.31g) were supplied from a private sector fish farm located in Mazandaran Province and were randomly allocated in 12 tanks (20 fry tank) and after acclimation, triplicate grouped were fed with diets supplemented with 0 (control), 0.5, 1 and 2% isomaltooligosaccharide for 8 weeks. At the end of the period growth factors (final weight, weight gain, SGR, CF) as well as survival rate and resistance to salinity stress were measured. Our results showed that common carp fry fed with isomaltooligosaccharide supplemented diet showed no significant effects on growth condition include final weight, specific growth rate, condition factor when compared with control treatment (P>0.05). Survival showed no significant difference between prebiotic supplemented treatment compare with control (p>0.05). Resistance showed a significantly increase in all treatments except the control treatment (p < 0.05) and the highest mortality was observed in control treatment.