Effect of of fish pump on blood and imonological factors of Rainbow trout (Oncorhynchus mykiss)

During fish transportation, methods should be applied to control the stress of fish and maintain water quality. One of the new methods that is now welcomed is using fish pump. So far, extensive studies have been accomplished to examine the impact of this pump on the efficiency of fish transport and health after transportation. Unfortunatly there is no research done in this regard in Iran. Therefore, this study aimed to determine the effects of fish pump on blood and monological parameters of rainbow trout juvenils. A total of 1500 juvenil rainbow trout weighing 35.18±2.21 gr were used for this experiment. Treatments include one control and two treatments viz. group transported by hand net and group transported using fish pump. The results showed that the health of the transported fish could be kept in the optimum level using fish pump. Furthermore, comparing different treatments revealed applying fish pump not only reduces fish mechanical damages decreasing losses, but also the fish do not suffer from oxygen deficiency.