Effects of dietary Persian oak (Quercus brantii var. persica) fruit extract on survival,growth performance,haematological and immunological parameters in rainbow trout,Oncorhynchus mykiss,fingerlings |
| |
| Authors: | S Bohlouli G Ghaedi M Heydari A Rahmani E Sadeghi |
| |
| Institution: | 1. Veterinary Medicine, Kermanshah Branch, Islamic Azad University, Kermanshah, Islamic Republic of Iran;2. Fisheries Department, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Khouzestan, Islamic Republic of Iran;3. Marine Ecology Department, Faculty of Marine Sciences, Khorramshahr University of Marine Science and Technology, Khorramshahr, Khouzestan, Islamic Republic of Iran;4. Fisheries Department, Faculty of Natural Resources, Urmia University, Urmia, West Azerbaijan, Islamic Republic of Iran;5. ResearchCenter for Environmental Determinants of Health, Kermanshah University of Medical Sciences, Kermanshah, Islamic Republic of Iran |
| |
| Abstract: | The aim of study was to evaluate the effects of jaft (internal layer of oak fruit) extract on growth, haematological and immunological parameters in rainbow trout fingerlings. A total of 360 fish (average weight 6.25 g, total length 7.75 cm) were randomly distributed in 12 fibreglass tanks (stocking density: 1.04 g L?1) with flow rate of 8 L min?1. The ethanolic extraction of jaft was taken, and, then, a basal diet was supplemented with 0 (control), 0.5, 1 and 2 g kg?1 to formulate four experimental diets. After 8 weeks, blood sampling was performed for haematological and immunological parameters. While immunological parameters such as IgM and lysozyme showed their lowest level in control group, their highest amounts appeared in 2 g kg?1 group. C3, C4 and alternative complement activity increased in fish fed 2 g kg?1 extract compared to control (P ? 0.05). Haematological parameters such as white blood cell, red blood cell, haemoglobin and haematocrit were enhanced in experimental groups (P ? 0.05). Survival and growth indices did not show significant changes in experimental treatments (P ? 0.05). Results indicated feeding rainbow trout with Persian oak extract at 0.5, 1.0 and 2.0 g kg?1 levels significantly enhance the immunological parameters. |
| |
| Keywords: | blood growth immunological parameters jaft extract Persian oak rainbow trout |
|
|
