Non-gelatinized starch influences the deposition of n-3 fatty acids in the muscle of a tropical freshwater fish, Labeo rohita.
A 60-day feeding trial was conducted to study the influence of gelatinized (G) to non-gelatinized (NG) starch ratio in the diet on fatty acids profiles and oxidative status in Labeo rohita fingerlings. Two hundred and thirty-four fingerlings (average weight: 2.53 g) were distributed in six treatment groups with each of three replicates. Six semi-purified diets either containing NG and/or G corn starch (42.43%) viz., T(1) (100% NG and 0% G starch), T(2) (80% NG and 20% G starch), T(3) (60% NG and 40% G starch), T(4) (40% NG and 60% G starch), T(5) (20% NG and 80% G starch) and T(6) (0% NG and 100% G starch) was fed to respective groups. Catalase, superoxide dismutase and malic enzyme activities decreased linearly with the increasing level of G starch, whereas reverse trend was found for glucose-6-phosphate dehydrogenase. Total saturated fatty acids in muscle increased with the increasing level of G starch in the diet. Total n-3 fatty acids decreased linearly with the increasing level of G starch in the diet. Among the n-3 fatty acids, linolenic acids content was more in NG starch fed group. Similarly, eicosapentaenoic acid contents gradually decreased with increasing level of G starch content. The n-6/n-3 ratio was higher in G starch fed group. This suggests that dietary starch type may be manipulated for quality improvement of fish flesh.
Kumar
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Department of Aquaculture System and Animal Nutrition in the Tropics and Subtropics, University of Hohenheim, Stuttgart, Germany. vikaskr_2005@rediffmail.com
Sahu
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Pal
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Kumar
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Sharma
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Chettri
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Sinha
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D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002347:Carps / Q000502:physiology*; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements; D015525:Fatty Acids, Omega-3 / Q000378:metabolism*; D005618:Fresh Water; D018482:Muscle, Skeletal / Q000378:metabolism*; D013213:Starch / Q000378:metabolism*; D014329:Tropical Climate
D015525:Fatty Acids, Omega-3; D013213:Starch