Quantitative evaluation of rainbow trout, Oncorhynchus mykiss cultured in brackishwater and freshwater of Yazd province, at the based on muscle

Fish culture has developed in Yazd province of Iran since recent decade and the rainbow trout, Oncorhynchus mykiss is the most important fisheries product in the area. There is a few information about carcass composition of cultured fish in Iran. Rainbow trout samples were collected from 6 fish brackish and fresh water fish farms of Yazd province during February 2007. Fish muscle samples were freezed in -30 C after being homogenized, till laboratory analyses. Proximate composition of samples contained 17.05-18.53% crude protein, 2.35-5.13% total fat, 1.31-1.7% ash and 74.18-77.05% wet. Saturated fatty acids including palmitic acid (14.06-19.60%), stearic acid (6.44-6.1%), myristic acid (1.29-5.66%) and lauric acid (0.13-2.76), also unsaturated fatty acids oleic (30.24-40.14%) and linoleic (21.18-38.85%) were extracted from muscle tissue of fish of different farms, using GC. Other unsaturated fatty acids including -linolenic acid, EPA and DHA had low concentrations (1-3%) in samples. Vitamin E level was 4.33-94.34 g/100gr. Concentration of minerals in homogenated muscle tissues were as: Na 822.58-1052.78ppm, K 12272.75-13715.25ppm, Ca 104.75-171.03ppm, Fe 19-40ppm, Cu 0.044- 1.01ppb, Zn 7.02-12.47ppb, Cd 0.879-1.099ppb and Cr 1.895-3.86ppb. Heavy metal concentrations were lower than permitted values.

Bibliographic Details

Main Authors:	Mashaii, Nassrin, Saresangi, H., Abad, A., Rajabipour, F., Bitaraf, A., Ghoroghi, A., Mohammadi Tabasi, M., Nazemi, M., Asgari Hasani, M.
Format:	monograph biblioteca
Language:	Persian
Published:	Iranian Fisheries Science Research Institute 2009
Subjects:	Aquaculture, Iran, Yazd province, Oncorhynchus mykiss, Rainbow trout, Fish culture, Tissues, Brackish water, Muscle,
Online Access:	http://hdl.handle.net/1834/39626
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