Jornal de Pesquisa e Desenvolvimento em Aquicultura

Abstrato

The Effects of Folic Acid Treatment on Biometric and Blood Parameters of Fingerling Rainbow Trout Fishes (Oncorhynchus mykiss)

Lameeihassankiadeh Soheil ,Khara Hossein ,Nezamibaloochi Shabanali ,Borani Mohammad ,Mohammadalikhani Mehdi ,Abbasian Firouz *

Folic acid is an essential vitamin for fish farming, and its shortage or extra-administration leads to physiological dysfunctions and then, to decrease the production efficiency rate. This research studied the effects of two different doses of folic acid (6 and 10 mg/kg dried food) on different biometric, hematologic and immunological parameters of fingerling rainbow trout fishes (Oncorhynchus mykiss). Totally, we showed that both doses could improve different biometric factors (except for condition index). Furthermore, despite the detrimental effects of these treatments on red blood cells, they could improve immunological functions of the fishes. Since no differences have been observed between the effects of these two folic acid doses, we concluded that treatment of this fish with 6 mg folic acid per kg dried food was as efficient as treatment with 10 mg folic acid.