Influence of nutrition on the lipid quality of pond fish: common carp (Cyprinus carpio) and tench (Tinca tinca) |
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Authors: | Werner Steffens Manfred Wirth |
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Institution: | (1) German Anglers Association, Berlin, Germany;(2) Department of Fish Culture and Fish Pathology, Institute of Freshwater Ecology and Inland Fisheries, Berlin-Friedrichshagen, Germany;(3) Eitelsdorfer Str. 32, 12555 Berlin, Germany |
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Abstract: | Like marine fish freshwater fish are an important source of essential fatty acids for human nutrition. However, the fatty
acid composition of pond fish can vary considerably and strongly depends on that of the ingested food. Investigations on the
fatty acid composition of common carp (Cyprinus carpio) and tench (Tinca tinca) have shown that different methods of rearing and feeding cause substantial variations in the proportions of the n-6 and
n-3 polyunsaturated fatty acids of these fish species. Carp reared on the basis of natural food in ponds exhibit high contents
of n-6 as well as n-3 fatty acids in their muscle triacylglycerols. On the other hand carp fed supplementary wheat in ponds
resulted in somewhat lower levels of these essential fatty acids. High amounts of n-3 fatty acids can be found in carp fed
high-energy diets containing high levels of fish oil. Analogous results were obtained in experiments with tench reared under
different nutritional conditions. While rearing on the basis of only natural food in ponds as well as feeding supplementary
wheat yielded in similar levels of n-3 and n-6 polyunsaturated fatty acids, higher contents of n-3 fatty acids were recorded
in tench fed pellets. High levels of n-3 polyunsaturated fatty acids in foodstuffs have positive effects on human health.
Experiments with different cultured fish species proved that the fatty acid composition of the edible parts can be influenced
by the diet. Therefore, a finishing diet with a suitable fatty acid profile can be used to improve the nutritional quality
of fish products of farmed origin. |
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Keywords: | Carp Cyprinus carpio Fatty acid composition Lipid content Nutrition Tench Tinca tinca |
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