Impact of feeding juvenile pikeperch (Sander lucioperca (L.)) diets supplemented with vegetable oils on proximate body composition and fatty acid profile
2010
Zakes, Z. | Kowalska, A. | Jankowska, B. | Demska-Zakes, K. | Hancz, C. | Jarmolowicz, S.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Aquaculture
Juvenile pikeperch, Sander lucioperca (L.), were reared in recirculating aquaculture systems for 55 days and fed a commercial trout diet or diets supplemented with the following vegetable oils (VO): rapeseed, soy, sunflower. The level of feed supplementation with VO was 84 percent of the total crude fat (CF), which was achieved by adding 160 g VO/kg feed to the commercial feed base that contained 30 g CF/kg feed. The diets tested did not have a significant impact on the proximate composition of the whole fish, fillets, or viscera. Significant differences were noted in the protein and fat contents of the pikeperch livers. The fatty acid (FA) profiles of the pikeperch body parts (whole fish, fillets, viscera, liver) analyzed reflected the proximate composition of the diets applied. The FA profiles of pikeperch muscles were the most stable. The diets tested did not have a significant impact in the fillets of fish from the VO groups on the value of summed products of polyunsaturated FA from the n3 family (n3 PUFA) to the PUFA from the n-6 family (n6 PUFA) (n3/n6 ratio)
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