Physiological changes in male and female pikeperch Sander lucioperca (Linnaeus, 1758) subjected to different photoperiods and handling stress during the reproductive season

摘要: Pikeperch broodstocks were exposed to different photoperiods: constant light (24L:0D), darkness (0L:24D), and 12 h light, (12L:12D), for 40 days. Half of the each photoperiod handling stress at a specific time day. Results showed that cortisol lactate did not reveal any significant difference. However, glucose levels in females increased stress-free period comparison with stressful photoperiods (0L:24D-s). Red blood cells males white difference under regimes. Both sexes no differential count leukocytes stress. Constant affected hematological parameters, particularly, number lymphocytes neutrophils females. Our findings revealed due long-term exposure stressors, pikeperch brooders become adapted conditions.