Effect of stocking density on the expression of glucose transporter protein 1 and other physiological factors in the Lake Victoria Nile tilapia, Oreochromis niloticus (L.)

摘要: Fish farmers have a tendency of employing high stocking density (HSD) as means increasing productivity. However, HSD is chronic stressor that likely to lower profitability fish farming if not implemented properly. induces stress which in turn elevates sequentially the levels plasma cortisol and glucose. The resultant glucose distributed various tissues by transporter protein (GLUTs) restore normalcy. GLUT 1, transmembrane found erythrocytes, responsible for import export red blood cells. knowledge on how impact 1 subjected still unclear. In this study, effect expression Nile tilapia was investigated an attempt elucidate role metabolism during stress. were reared 4 weeks at 1.5 4.5 kg/m3 low (LSD) HSD, respectively. Four physiological parameters determined from samples obtained end experiment. At p < 0.05, there significant differences between LSD level (72.1 ± 5.9 ng/ml 37.5 4.6 ng/ml); (136.00 1.3 mg/dL 70.2 1.0 mg/dL); erythrocytes count (7.2 0.5 × 106 mm−3 2.1 0.4 mm−3); (1.40 0.17 rbi 0.81 0.07 rbi), induced elevation level, level. These elevated factors particularly can be used cellular biomarker aquaculture.