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Table 3 Effects of dietary methionine level on carcass traits of Pekin ducks at 42 days of age.

From: Dietary methionine deficiency stunts growth and increases fat deposition via suppression of fatty acids transportation and hepatic catabolism in Pekin ducks

Dietary Met level, % Dressing percentage, % Eviscerated carcass Abdominal fat Skin and subcutaneous fat
Weight, % Percentage, % Weight, % Percentage, % Weight, % Percentage, %
0.28 86.8±1.0 1663±105b 57.9±2.2b 32.2±10.6a 1.46±0.48a 514.0±94.5 25.0±3.7a
0.35 87.0±1.6 1712±115b 59.1±1.6b 26.6±5.9b 1.19±0.26b 492.1±46.4 23.5±1.4a,b
0.43 86.8±0.9 1858±142a 60.9±1.8a 20.3±2.8c 0.86±0.11c 489.9±37.6 21.8±1.7b
0.50 87.5±1.0 1777±177a,b 61.8±1.6a 20.1±5.6c 0.89±0.21c 454.6±81.9 21.6±1.2b
0.58 87.2±1.0 1775±129a,b 60.8±1.5a 20.1±5.8c 0.85±0.21c 473.8±66.2 21.6±2.1b
P value
 Met 0.492 0.013 <0.001 <0.001 <0.001 0.301 0.001
 Met linear response   0.026 <0.001 <0.001 <0.001   <0.001
 Met quadratic response   0.032 0.007 0.019 0.011   0.071
  1. a–c Means within a column with no common superscripts differ significantly (P < 0.05).
  2. Values are the means of 6 replicates of 2 ducks.