Department of Ocean Sciences, Memorial University of Newfoundland, Marine Lab Road, St. John’s, NL, A1C 5S7, Canada
Parrish CC, currently working at Memorial University of Newfoundland • Department of Ocean Sciences, PhD. The number of articles published are 280 and the number of times cited by, are 8217 and the number of reads include are 30,331. The area of interest in the research was marine ecology, Fisheries, Conservation Biology and Biodiversity.
Research Article
Effect of Growth Temperature on Muscle Lipid Class and Fatty Acid Composition in Adult Steelhead Trout (Oncorhynchus mykiss) Fed Commercial Diets with Different ω6 to ω3 Fatty Acid Ratios
Author(s): Wijekoon M, Parrish CC* and Mansour A
The effect of fluctuating temperature on muscle lipid composition was examined in 1.8 Kg steelhead trout fed 3 commercial diets with varying proportions (16.5 - 31% total) of Σω3 fatty acids and large differences (5×) in ω6:ω3 fatty acid ratios. Temperature was increased from 13.5°C to 18.0°C and then dropped back down to 13.5°C over a period of 12 weeks. Diet had no significant effect on growth or on total polyunsaturated fatty acid (PUFA) proportions in muscle tissue, but significant changes were observed in individual fatty acids. There was a greater response to changes in diet in the fatty acids than there was to changes in temperature. Muscle C20–C22 ω3PUFA and C18 unsaturated fatty acids reflected dietary inputs leading to very different (up to 40%) ω6:ω3 fatty acid ratios. Independent of diet, increasing temperat.. View more»