The High Energy Diet for Salmon

Effect of Fat on Muscle Quality
  • R. G. Ackman
  • T. A. Gill
  • X. L. Xu


High energy diets are popular in today’s salmon farming, but this kind of diet can now contain up to 40% of dietary fat which may greatly affect the lipid composition of fish, both in mesenteric tissues and edible muscle, and finally affect the product quality. To confirm this view, a feeding experiment with Atlantic salmon Salmo salar was conducted for 12 months. Two commercial diets were fed, both similar in all nutrients except fat levels (25 and 30%). The results demonstrate a positive correlation between dietary fat and lipid deposition in the fish muscle. The data show that there was a significant difference in muscle lipid deposition between the fish fed diets with two different fat levels (P< 0.01). However, lipid deposition varied considerably with fish size (P<0.05), as well as with sexual maturation (P<0.05). The muscle protein remained similar for the two dietary treatments. Texture measurements and sensory panels were conducted on certain dorsal muscle sites in specific steak cuts; however, no significant difference in muscle texture was found by either Texture Analyser or sensory panel evaluation (P> 0.05). Exhaustive exercise of salmon fed these two fat level diets was also conducted. The results of analyses indicated that the lactic acid content in both dietary treatment fish fillets remained relatively the same, and no significant difference was found in texture properties between fish from the two dietary treatments


Rainbow Trout Atlantic Salmon Lipid Deposition Exhaustive Exercise Sensory Panel 
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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • R. G. Ackman
    • 1
  • T. A. Gill
    • 1
  • X. L. Xu
    • 1
  1. 1.Canadian Institute of Fisheries and TechnologyDalTech Dalhousie UniversityNova ScotiaCanada

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