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- W2078306716 abstract "A study was carried out to examine the influence of the length of the daily feeding period on feed intake and growth of whitefish (initial weight 60–90 g), with the aim of providing guidelines as to the feeding regimes to be used when cultivating this species. Fish were held at 14.5 °C under a 24L:0D photoperiod. Following a period during which fish were fed throughout the day, feeding regimes of 6, 12, 18 or 24 h feeding per day were imposed on 3 tanks of fish per treatment. These feeding regimes were maintained for 6 weeks during which feed intake (3 times by X-radiography) and growth were monitored. When feeding was restricted to 6 h each day daily intake tended to be initially reduced, but by the end of the experiment daily feed intake did not differ between groups of fish held on the different feeding regimes. This indicates that the fish fed according to the time-restricted regimes were able to compensate for the reduced length of the feeding period, but some weeks were required before the compensatory mechanisms took full effect. Time-restricted feeding also resulted in fish on the 6 h regime having significantly lower rates of growth (0.98 ± 0.08% d−) than those on the 24 h regime (1.42 ± 0.14% d−1) early in the experiment. During the latter stages of the experiment, there were no significant differences in growth rates amongst the fish fed according to the different regimes. The differences established early in the trial were still apparent after 6 weeks, with overall rates of growth for the entire trial period seeming to be directly related to the length of the feeding period (6 h: 1.27 ± 0.09% d−1; 12 h: 1.39 ± 0.06% d−1; 18 h: 1.46 ± 0.19% · d−1; 24 h: 1.65 ± 0.05% d−1). However, the only significant differences recorded were between the 6 and 24 h feeding regime groups. Length of the feeding period was not found to have any significant effect upon feed conversion, although there was a tendency for the feed:gain ratio to be lowest in the groups of fish fed according to the time-restricted feeding regimes (6 h: 0.57 ± 0.05; 12 h: 0.58 ± 0.06; 18 h: 0.65 ± 0.07; 24 h: 0.64 ± 0.08). The results indicate that whitefish are flexible in their feeding behaviour, and adapt readily to imposed regimes over a period of a few weeks. These modifications to feeding responses result in good growth performance and good feed conversion." @default.
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- W2078306716 date "1997-10-01" @default.
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- W2078306716 title "Influence of the length of the daily feeding period on feed intake and growth of whitefish, Coregonus lavaretus" @default.
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- W2078306716 doi "https://doi.org/10.1016/s0044-8486(97)00079-3" @default.
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