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Feed intake, growth, feed utilization, body composition and waste output of juvenile hybrid bream at different feeding frequencies

Author:
Wu, Yubo, Ren, Xing, Zhou, Jinhua, Lin, Haihan, Wang, Xiujuan, Ma, Hengjia
Source:
Aquaculture nutrition 2019 v.25 no.2 pp. 292-297
ISSN:
1353-5773
Subject:
body fat, body weight, bream, crude protein, experimental diets, feed conversion, feed intake, feeding frequency, hybrids, juveniles, lipid content, lipids, nitrogen, nitrogen retention, phosphorus, satiety, wastes, weight gain
Abstract:
An eight‐week feeding trial was conducted to evaluate the feed intake, growth, feed utilization, body composition and waste output of juvenile hybrid bream at different feeding frequencies (0.5, 1, 2, 3 or 4 meals/day). Fish (initial body weight of 10.6 ± 0.8 g) were fed to satiation at each feeding. The test diet contained 336 g/kg crude protein and 79 g/kg crude lipid. The weight gain significantly increased with increase in feeding frequency from 0.5 to 3 meals/day (p < 0.05) and afterwards did not change with feeding frequency from 3 to 4 meals/day (p > 0.05). The feed intake increased with increase in feeding frequency (p < 0.05). Fish fed at 3 meals/day exhibited the lowest feed conversion ratio and waste output of nitrogen and phosphorus, however, the highest nitrogen retention efficiency (p < 0.05). No significant differences were found in the phosphorus retention efficiency, the body composition of crude protein, ash and phosphorus among all the feeding frequencies (p > 0.05). The body lipid content increased, whereas the content of moisture decreased, with the increase in feeding frequency (p < 0.05). The present study reveals that the optimum feeding frequency is 3 meals/day for hybrid bream.
Agid:
6327185