Department of Fisheries, Faculty of Natural Resources, Islamic Azad University, Lahijan Branch, Lahijan, Guilan, Iran.
Fish Physiol Biochem. 2013 Oct;39(5):1253-66. doi: 10.1007/s10695-013-9780-z. Epub 2013 Mar 17.
Pikeperch broodstocks were exposed to different photoperiods: constant light (24L:0D), constant darkness (0L:24D), and 12 h light, 12 h darkness (12L:12D), for 40 days. Half of the broodstocks of each photoperiod were exposed to handling stress at a specific time of the day. Results showed that cortisol and lactate did not reveal any significant difference. However, glucose levels in females increased in the stress-free darkness period in comparison with stressful darkness photoperiods (0L:24D-s). Red blood cells in males and white blood cells in females showed a significant difference under different photoperiod regimes. Both sexes showed no significant difference in the differential count of leukocytes under different photoperiods and handling stress. Constant photoperiods and handling stress affected the hematological parameters, particularly, the number of lymphocytes and neutrophils in females. Our findings revealed that due to a long-term exposure to stressors, pikeperch brooders become adapted to stressful conditions.
持续光照（24L:0D）、持续黑暗（0L:24D）和 12 小时光照、12 小时黑暗（12L:12D），持续 40 天。每个光周期的亲鱼有一半在一天中的特定时间暴露于人为应激。结果表明，皮质醇和乳酸没有显示出任何显著差异。然而，与应激黑暗光周期相比（0L:24D-s），在无应激的黑暗期，雌性的血糖水平升高。在不同的光周期下，雄性的红细胞和雌性的白细胞有显著差异。在不同的光周期和人为应激下，白细胞分类计数在两性中均无显著差异。持续的光周期和人为应激影响了血液学参数，特别是雌性的淋巴细胞和中性粒细胞数量。我们的研究结果表明，由于长期暴露于应激源，鲈形目亲鱼适应了应激条件。
