Open AccessEffects of Dietary Savory and Myrtle Essential Oils on Growth, Survival, Nutritional Indices, Serum Biochemistry, and Hematology of Farmed Rainbow Trout, Oncorhynchus mykiss , Fry
Author(s) -
Mohamadi Saei Mohsen,
Beiranvand Kiarash,
Khalesi Mohammad K.,
Mehrabi Farzaneh
Publication year - 2016
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12306
Subject(s) - biology , rainbow trout , feed conversion ratio , zoology , hematology , protein efficiency ratio , hematocrit , immunity , albumin , food science , endocrinology , body weight , fishery , fish <actinopterygii> , immune system , immunology
The effects of diets containing different levels of essential oils from savory Satureja khuzestanica Jamzad and myrtle Myrtus communis L and an immunity complement were investigated on growth, survival, nutritional indices, serum biochemistry, and hematology of farmed rainbow trout, Oncorhynchus mykiss , fry ( n = 4500; 5 ± 2 g). The essential oils were dosed as 300 and 500 mg/kg diet. After 60 d, the fish fed 300 mg/kg of the essential oils showed the highest counts of white blood cells ( P < 0.05). The same treatment revealed the greatest levels of hematocrit, total protein, and albumin, but glucose and cholesterol values significantly decreased compared with the control ( P < 0.05). Feeding fish with 300 mg/kg of the essential oils led to highest records of specific growth rate and survival rate but the lowest feed conversion ratio ( FCR ), and those fed with immunity complement attained the lowest values of growth parameters. The fry fed with immunity complement and 300 mg/kg of myrtle essential oil achieved the highest and lowest FCR values, respectively. The results indicate that dietary supplementation of 300 mg/kg of the above essential oils exert positive impacts on the growth performance, feeding efficiency, and hematological factors in O. mykiss .