عنوان مقاله [English]
In this study, fatty acid profile of Acartia tonsa in the summer and spring of 2015 in the Caspian Sea (Noshahr) was studied. Sampling was performed below the surface of the water by special zooplankton sampling net (100 microns). .Acartia tonsa samples were isolated, filtered and frozen for fatty acid examination and composition of fatty acids was investigated by GC/MS instrument. The results showed that total saturated fatty acids in spring and summer were 62% and 31,12% , unsaturated fatty acids (MUFA) were 23.89% and 26.11% and unsaturated fatty acids (PUFA) were 14.59% and 23.51%, respectively. Statistical analysis suggested that there was no significant difference between the independent groups of fatty acids in spring and summer except for some of the important fatty acids such as Myristic acid, Palmitic acid, Oleic acid, EPA and DHA which were significantly different in two seasons. The reasons for the differences in the composition of fatty acids are probably related to seasonal changes, availability of food resources, and the composition of fatty acids in the food supply and density of phytoplankton species in each season.
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