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Research Article

Fatty acids metabolism in skeletal muscles and growth rate in common carp (Cyprinus carpio L.) after feeding diet with varied copper and zinc concentrations

Yosyp Rivis, Nataliya Yanovych

Institute of Agriculture of Carpathian Region, Lviv, Ukraine

Lviv National University of Veterinary Medicine and Biotechnology named after S. Gzhytskyi, Lviv, Ukraine

1. Acta Sci. Pol. Zootechnica, 16(1), 2017, 23‒30
2. DOI: 10.21005/asp.2017.16.1.04

Abstract. Increasing zinc and copper concentration in diet is accompanied with increasing of their content in common carp (Cyprinus carpio L.) tissues, namely in skeletal muscles. Correspondingly, concentration of anionic forms of fatty acids in the skeletal muscles is also increasing. Total content of non-esterified fatty acids tends to increase in the skeletal muscles of carp at copper and zinc concentration in mixed fodder 8 and 100 mg/kg respectively, while at 16 and 200 mg/kg of copper and zinc respectively, it is decreasing. Increasing of copper and zinc concentration in the diet of carps is accompanied by increasing of level of fatty acids of total lipids in their skeletal muscles. Simultaneously, in total lipids of the skeletal muscles of carp, ratio of polyunsaturated fatty acids of ω-3 family to ω-6 family is increasing. Wherein in total lipids of the skeletal muscles of carp, efficiency of linolic and linolenic acids transformation to their more long-chain and more unsaturated derivatives is growing; concurrently intensity of transformation of myristinic, palmitinic, stearinic and arachinic acids of total lipids to their corresponding monounsaturated derivatives is increasing. During the period of investigations, carp of trial groups had higher wieght gains in comparison to carp of control group.

Keywords: carp, skeletal muscles, zinc, copper, fatty acids, metabolism