Effect of spearmint essential on reducing stress during transportation of common carp (Cyrpinus carpio)

Anesthetic substances are essentially necessary for the convenience of manipulation and minimizing the stress and physical damage of fish in various processes in aquaculture. The purpose of this study was to evaluate the effects of spearmint essential oil on reducing the stress of common carp with average weight of 1.5 ± 0.2 g during transportation. Fish were exposed to various concentrations of spearmint essential oil (0 (control), 10, 20 and 30 μl / liter). Cortisol, glucose, total protein, albumin and immunoglobulin levels were measured one hour after transport. The results of this study showed that the control group had the highest levels of cortisol and glucose and the lowest levels of total protein and immunoglobulin compared to other groups. There was also no significant difference between albumin levels in experimental groups (P≥0.05). The results of this study showed that application 10 μl / liter spearmint essential oil can reduce fish stress in transport of common carp.