EFFECT OF NANO-FE ON GROWTH PERFORMANCE AND IMMUNE FUNCTIONS OF STELLATE STURGEON Acipenser stellatus
The present study aimed to investigate the effects of iron nanoparticles (Fe-NPS) on growth performance, liver histopathology and some immune parameters of stellate sturgeon (Acipenser stellatus) juvenile. A total of 144 fish (182.09 ± 9.05g) were fed diets containing graded levels of Fe-NPs (0, 25, 50 and 100 mg kg -1 diet) as T0, T25, T50 and T100 respectively for 8 weeks. No significant differences were observed ingrowth performance parameters, lysozyme activity, albumin and liver enzymes concentration between treatments (P>0.05). The T 50 group showed a significant difference in the white blood cells, neutrophils, total protein, respiratory burst activity, & total immunoglobulin level (P<0.05 ) with the less negative effect on the liver. These results indicated that Fe-NPs at level 50 mg Kg -1 will improve the welfare of A.stellatus juvenile.
Sturgeon culture is an important industry to provide meat and caviar. Preparing the food for fish is very important because at least half of production costs belong to food. Iron is one of the most essential micronutrients in terms of its effect on the functioning of the immune system and def ense against various infections. Positive effects of iron NPs have been shown on growth rate, and immunity responses in Labeo rohita , Clarias gariepinus, Oreochromis niloticus , etc. To our knowledge, there is no information about the effects of Fe-NPS in stellate sturgeon.
A total of 144 fish (182.09 ± 9.05g) were fed diets containing graded levels of Fe-NPs (0, 25, 50 and 100 mg kg -1 diet) as T0, T25, T50 and T100 respectively for 8 weeks. Finally, growth parameters, blood and immune factors, alteratio n in liver tissue were examined and data were analyzed using SPSS software.
Results of growth performance and blood & immune parameters are presented in Table 1 and 2 respectively.
liver cells in all treatments were completely seamless, without any cellular disorder and abnormalities. The structure of the liver sinusoids was normal, without any bleeding.
Supplementation of dietary Nano-Fe appears to be most positive for improving immune parameters of stellate sturgeon juvenile.
