Self-selection of diets with different oil oxidation levels in gilthead seabream (Sparus aurata)

摘要: Abstract The present research looked at the ability of gilthead seabream to discriminate between two similar diets differing only in extent lipid oxidation. Six groups 4 fish (254 g initial wet weight) were allowed be selected by means self-feeders complete (34.5% casein + gelatin, 14.8% oil + soybean oil, 24.8% dextrin and 25.9% vitamins, minerals, filler binder) which differed oxidation level source: 6.2 meq/kg for control (D1) 100.0 meq/kg oxidized diet (D2). During first nine days trial, took amounts D1 D2, although there was a clear tendency gradually avoid D2. Finally, on day 10 demanded significantly higher percentage (82%) D1. When interchanged investigate feeder preferences, selection patterns observed: three resumed their from 7 onwards, while other did not show preference any until they subjected 3-week fasting period (which boosts internal oxidation), after Taking together results before fasting, able with lipids, physiological state (oxidative stress caused fasting) appeared reinforce selection/avoidance behavior.