effects of transportation on stress indicators, steroids hormones and hematological parameters of the broodstocks of common carp (cyprinus carpio)

abstrac effects of stress due to transportation on the common carp (cyprinus carpio) broodstock from ponds to the hatcheries in three intervals include immediately after the catching, 2 hours for transfer and 24 hours after transportation on changes in levels of cortisol, glucose, sex steroids (testosterone and estradiol) and blood factors were analyzed with sampling from 30 broodstock. results showed that cortisol levels rose quickly after the catching (625 ng per ml) and significantly decreased after 24 hours (409 ng per ml) (p<0.05). over time, the trend of the glucose variations was increased, however, no significant differences were observed at different times (from 81.7 to 98.5 g per dl) (p >0.05). testosterone and estradiol levels were significantly different among the three intervals, in which the highest values ​​were observed after the catching and significantly decreased with time (p<0.05). the amounts of red blood cells, hemoglobin, hematocrit, mean corpuscular volume, mean hemoglobin and mean cell hemoglobin concentration were significantly different between after the catching and other treatments (p<0.05), which may be affected by the stress caused by fishing. levels of white blood cells, lymphocytes, monocytes, eosinophils and neutrophils showed no significant differences among treatments (p>0.05). also, 24-hour maintenance of breeder’s improved the blood parameters. based on the results, the transportation of common carp broodstock had negative effects on cortisol, steroid hormones and some blood parameters (erythrocyte and hemoglobin values), thereby it is necessary to the maintenance of broodstock (even in the short-term transfer) in hatcheries ponds.