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Effect of different oxygen levels on growth performance, stress response and oxygen consumption in two weight groups of great sturgeon Huso huso | ||
| Iranian Journal of Fisheries Sciences | ||
| مقاله 4، دوره 12، شماره 3، مهر 2013، صفحه 533-549 | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2018.114297 | ||
| نویسندگان | ||
| F. Bagherzadeh Lakani؛ M. Sattari* ؛ B. Falahatkar | ||
| چکیده | ||
| In the present study, different oxygen levels were examined in two weight groups of great sturgeon Huso huso including small size (with initial weight 280.9 ± 49.2 g) and large size (with initial weight 1217.9 ± 138.1 g). The fish were kept in hypoxia (2-3 mg/l), normoxia (5-6 mg/l) and hyperoxia (9-10 mg/l) conditions for 8 weeks and then were individually placed in the tanks with oxygen level of 6 mg/l to levels causing sedate fish and subsequently dissolved oxygen level in water was measured every 30 minutes. No significant effects on blood cortisol and glucose levels were observed after 8 weeks (P>0.05), but there were significant differences in cortisol concentrations between treatments (P < 0.05) after stress. Significant differences were found in cortisol and glucose levels in pre and post stress conditions in small size, but no significant differences were observed (P>0.05) in large size. There were no significant differences in oxygen consumption among treatments (P>0.05). Results revealed that dissolved oxygen had a significant effect on growth of H. huso and also a low level of oxygen accompanied by reduction in feed intake resulted in lower growth and changes in stress response. | ||
| کلیدواژهها | ||
| Huso huso؛ Growth performance؛ Hypoxia؛ Hyperoxia؛ Oxygen consumption | ||
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آمار تعداد مشاهده مقاله: 197 |
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