Determination of Fatty Acid Compositions in Eggs of Commercial Aquafeed Fed Broodstocks Rainbow Trout (Oncorhynchus mykiss) and Brown Trout (Salmo trutta spp.)

Authors : Nihat Yesilayer, Erol Türk

Pages : 67-74

View : 17 | Download : 8

Publication Date : 2018-12-15

Article Type : Research

Abstract :The experiment was carried out in a 6-month period prior to spawning of the broodstock rainbow and brown trout groups fed by commercial fish feed. The study aimed to determine the changes of fatty acid composition in eggs obtained from broodstock fish which were spawning for the first time. The fish in each group were selected from the same age and hatching eggs. The amount of PUFAs between the experimental groups was not different, while SFA and MUFA amounts were significantly different. The amounts of oleic acid (C18: 1n9c), linoleic acid (C18: 2n6c) and palmitic acid (C16: 0) were the highest among the fatty acids detected in broodstock fish egg groups and their feeds. Total omega-3 (n-3) content was considerably different between rainbow trout (4.3%) and brown trout (2.89%). The percentages of palmitic acid, palmitoleic acid, heptadecanoic acid and EPA were significantly different between the egg groups. Broodstock fishes need to be fed with good quality feed to give quality eggs in suitable environment conditions. For this reason, it has been shown that it reflected in the fatty acids of fish eggs while the breeding fish consume sufficient amounts of essential fatty acids on the diet. As a result of this situation, it can be ensured that the fish are healthier and have a higher percentage of life. 
Keywords : Fatty acid, Rainbow trout, Brown trout, egg, n-3, n-6