Effects of Sargassum illicifolium algae feeding on IgM level and lysozyme activity in Rainbow trout (Onchorhynchus mykiss)

Subject Areas : Fishery

N.  zamannejad ¹ (1- Dept. of Physiology, Faculty of Biology, Shahid Beheshti University)
H.  Emadi ² (Dept. of Fisheries, Faculty of Marine Science and Technology, Islamic Azad University Tehran North Branch)
O.  Hosseinzade Sahafi ³ (Dept. of Botany, Faculty of Biology, Shahid Beheshti University)

Received: 2015-03-17 Accepted : 2015-12-02 Published : 2016-03-20

Keywords: Rainbow trout, immunoglobulin levels, lysozyme activity, Sargassum illicifolium,

Abstract :

Main purpose of this research was to study the effects of Sargassum illicifolium on immunoglobulin levels, lysozyme activity of Rainbow trout. Blood levels of immunoglobulin, lysozyme activity of the fish were investigated. Totally 360 Rainbow trout specimens (75±10g )were divided in four groups and were fed with diets containing 0, 5, 7.5 and 10 g of pure dried Sargassum in each kilogram of food respectively, for a period of two months. At the end of the second month of culture, blood samples were taken from 12 fish (3 fish from each group), and sent to the laboratory for analysis. Results indicated that levels of IgM and lysozyme activity in the blood plasma of fish fed with Sargassum illicifolium showed significant statistical differences (P<0.05) with control group. The obtained results, indicate that Sargassum, containing beta carotene, has favorable effects on immunology, resistance and growth of rainbow trout.