Fatty acids in fish scales

This study represents the first determination of lipids and fatty acids in fish scales. Scales collected from groups of Atlantic salmon reared on fish farms and in experimental tanks were analyzed by chromatography. The complete suite of fatty acids normally found in marine organisms was detected in...

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Bibliographic Details
Published in:Marine biology 2010-07, Vol.157 (7), p.1567-1576
Main Authors: Grahl-Nielsen, Otto, Glover, Kevin A.
Format: Article
Language:English
Subjects:
Agnatha. Pisces
Animal and plant ecology
Animal, plant and microbial ecology
Aquaculture
Atlantic salmon
Biological and medical sciences
Biological research
Biology, Experimental
Biomedical and Life Sciences
Chemical properties
Fatty acids
Fish
Fish farms
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
Genetic factors
Life Sciences
Lipids
Marine
Marine & Freshwater Sciences
Marine biology
Marine fish
Marine organisms
Microbiology
Nutrition research
Oceanography
Original Paper
Physiological aspects
Salmo salar
Salmon
Scales (Anatomy)
Sea water ecosystems
Studies
Synecology
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
Zoology
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Summary:This study represents the first determination of lipids and fatty acids in fish scales. Scales collected from groups of Atlantic salmon reared on fish farms and in experimental tanks were analyzed by chromatography. The complete suite of fatty acids normally found in marine organisms was detected in the scales, with the following fatty acids dominating: 16:0, 18:0, 18:1n9, 20:5n3, 22:6n3 and 24:1n9. Scales contained relatively high levels of furan fatty acids, and the level of cholesterol (2.5–5 mg/g tissue) was much higher than the levels found in the edible parts of marine fishes (0.2–1 mg/g tissue). The fatty acid profile of scales was distinct between groups of salmon originating from different commercial strains reared on the same farm, between salmon groups originating from the same strains but reared at different farms, and between groups of fed and unfed salmon in experimental tanks. Together, these data indicate that the fatty acid composition of fish scales is dependent upon both environmental and genetic factors. The fatty acid composition of fish scales may be used in stock/population identification, for example identification of escaped Atlantic salmon to farm of origin.
ISSN:0025-3162
1432-1793
DOI:10.1007/s00227-010-1430-8