نوع مقاله : مقاله کامل علمی - پژوهشی
نویسندگان
1 استادیار، گروه شیلات، دانشکده کشاورزی و منابع طبیعی، دانشگاه گنبد کاووس، گنبد کاووس، ایران
2 2استادیار، گروه زیست دریا، دانشکده کشاورزی و منابع طبیعی دانشگاه گنبد کاوس، گلستان، ایران
3 استان گلستان- شهرستان گنبد کاووس- بولوار بصیرت- دانشگاه دولتی گنبد کاووس
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Turbidity is significant contributors to declines in populations of aquatic organisms. The aim of the present study was to investigate the effects of different levels of water turbidity on the growth performance, immune and antioxidant response of Rutilus caspius. A total number of 360 Caspian roach (with average weight 0.75± 0.052 g) randomly in 4 treatments and 3 repetitions in 12 tanks with concentrations of 0, 250, 500, 1000 mg L−1 (C0, C1, C2 and C3 respectively) was distributed for 40 days. Then the fish were subjected to salinity stress (13 g L-1) for 48 hours. The results showed that water turbidity significantly decreased growth performance and feed efficiency (P< 0.05). Total immunoglobulin and lysozyme activity in the control had a significant increase compared to other treatments (P< 0.05). Cortisol concentration in turbidity of 500 and 1000 mg SS L−1 (C2 and C3) had a significant increase compared to other experimental treatments (P< 0.05). Water turbidity significantly decreased tissue superoxide dismutase and glutathione peroxidase, but increased tissue malondialdehyde concentration (P< 0.05). Based on the obtained results, water turbidity with concentrations of 500, 1000 mg L−1 can reduce the physiological response and resistance of Rutilus caspius against salinity stress.
کلیدواژهها [English]