ABSTRACT
The effects of dietary nucleotide [NT] on growth performance and some haematological parameters of striped catfish [Pangasianodon hypophthalmus] were investigated. Different levels of the NT [0, 0.25, 0.5, 0.75, 1%] in the diet were used for 10 weeks starting on the fish weighted [1.52 +/- 0.11 g]. The results showed that NT supplementations did not improve final weight, weight gain, food conservation ratio as well as specific growth rates of striped catfish [P>0.05]. Among all growth evaluated parameters, only the condition factor was significantly improved in fish fed on 0.75 and 1% of NT in comparison to control [P<0.05]. There were no significant differences in hemoglobin, hematocrit, mean erythrocytic hemoglobin, mean erythrocytic volume, and mean erythrocytic hemoglobin concentration, white blood cell [WBC] counts and WBC/RBC ratio among fish fed on dietary nucleotide and control diet [P>0.05]. However, some significant fluctuations were observed in the haematological parameters within groups of fish fed on different levels of NT [P<0.05]. The results showed that feeding striped catfish with commercial NT had very limited effect on growth parameters and some haematological characteristics. Key words: Weight gain, Dietary component, Blood indices, Fresh water catfish
ABSTRACT
Nucleotides as low molecular weight intracellular compounds play key roles in diverse physiological and biochemical functions including encoding genetic information and mediating energy metabolism. To determine effects of different levels of dietary nucleotides [NT] on fatty acid profile in rainbow trout. This experiment was carried out in 700 L circular tanks with 40 fish per tank. NT was added to the diet at a rate of 0.0, 0.05, 0.1, 0.15 and 0.2 percent. Fish with average weight of 11.35 +/- 0.32 g were fed 5 times a day [3-5% of body weight] over 8 weeks. After 56 days of feeding, Eicosapentaenoic acid and Linolenic acid levels increased in fish fed on 0.2% NT compared to the control group. No significant difference [p>0.05] was in polyunsaturated fatty acids [PUFA], n-3, n-6, n3/n6 and saturated fatty acids [SFA] among groups. It can be concluded that dietary nucleotides exerted positive effects on fatty acid composition in rainbow trout