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- W2080995528 abstract "The influence of dietary fat level and whole-body adiposity on voluntary energy intake of juvenile rainbow trout Oncorhynchus mykiss (Walbaum) was examined using self-feeders. Groups of lean fish [crude fat (CF) = 7%] and fat fish (CF = 11%), pretreated with a commercial diet with or without supplemental pollock oil, were self-fed one of three fat level diets (CF = 8%, 13.5% and 19%) for 48 days at 17 °C. Final body weight (BW) and total digestible energy (DE) intake (kJ per fish) were positively affected by the initial BW. Relative to the initial BW, however, fat fish consumed less DE than lean fish. Although the effect of dietary fat level was not significant, percentage weight gain and daily DE intake per BW (kJ kg−1 BW day−1) of fat fish were significantly lower than those of lean fish (ancova with initial BW as a covariate, P < 0.05). Energy digestibility, feed efficiency and protein retention were improved with the dietary fat level; however, there was no difference resulting from body fat level. The whole-body fat levels at the end of the experiment increased with the dietary fat level. Between groups self-fed the same diet, fat levels of the initially fat fish were still higher than those of the lean fish. The results of the present medium-term study suggest that rainbow trout adjust DE intake from diets with fat levels ranging from 8% to 19%. Although body fat level affects neither energy digestibility nor protein utilization, a high body fat level may reduce DE intake and consequently depress growth." @default.
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- W2080995528 date "2002-07-01" @default.
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- W2080995528 title "Influence of dietary fat level and whole-body adiposity on voluntary energy intake by juvenile rainbow trout <i>Oncorhynchus mykiss</i> (Walbaum) under self-feeding conditions" @default.
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