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Table 4.

Fecal excretions and digestibility of phosphorus and calcium in fish fed test diets

Fecal composition (% of dry feces)
Digestibility (% of intake)
Test diet fedPCaPCa
HCl (5%) 1.047a±0.117 0.502b±0.115 61.3b±4.0 88.1±2.5 
H2SO4 (3.5%) 0.345c±0.037 0.438b±0.095 86.2a±1.4 89.4±2.1 
H2SO4 (1%) 1.063a±0.080 0.610b±0.145 56.7b±5.9 84.8±3.6 
Acetic acid (5%) 0.874b±0.081 0.574b±0.133 58.9b±6.0 82.9±4.5 
No-acid (0%) 1.169a±0.063 0.572b±0.118 40.3b,c±4.2 81.8±3.7 
Antacid (5%) 1.189a±0.077 1.392a±0.211 30.1c±8.3 81.2±3.3 
Fecal composition (% of dry feces)
Digestibility (% of intake)
Test diet fedPCaPCa
HCl (5%) 1.047a±0.117 0.502b±0.115 61.3b±4.0 88.1±2.5 
H2SO4 (3.5%) 0.345c±0.037 0.438b±0.095 86.2a±1.4 89.4±2.1 
H2SO4 (1%) 1.063a±0.080 0.610b±0.145 56.7b±5.9 84.8±3.6 
Acetic acid (5%) 0.874b±0.081 0.574b±0.133 58.9b±6.0 82.9±4.5 
No-acid (0%) 1.169a±0.063 0.572b±0.118 40.3b,c±4.2 81.8±3.7 
Antacid (5%) 1.189a±0.077 1.392a±0.211 30.1c±8.3 81.2±3.3 

Each value represents the average of six determinations (6 fish) ±s.e.m. Mean values in each column with different letters are significantly different (P<0.05). P, phosphorus; Ca, calcium.

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