The effect some growth factors of Common carp (Cyprinus carpio, Linnaeus, 1758) of feeding with different sources of zinc and iron (Nano-particles)

In this study, The effect some growth factors of Common carp (Cyprinus carpio) of feeding with different sources of zinc and iron (Nano-particles) was investigated. For this purpose, 420 specimens (with an initial average weight of 7.4 ± 45 g) were prepared. Fishes were sterilized and adapted to the laboratory conditions for 10 days. Then, fish were randomly divided into seven groups. The first group was considered as control and other groups received 10, 50 and 100 µg of iron and zinc nanoparticles per gram of diet for 75 days, respectively. The results of biometry showed that the fish fed with nanoparticles had better growth indicators than fish of control group. Also, improvement of growth indicators in fish fed with zinc was concentration-dependent, so that the greatest increase in growth factors was related to the zinc concentration (100 µg per g), but this finding was not observed in the fish fed with iron. The results showed that the adding of iron and zinc Nano-particles in the diet may play an important role in increasing and improving growth factors of Common carp.