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Table 1.

Fatty acid composition of microalgal species used in diet fed to mussels and oysters

VariableChaetoceros gracilis (CHGRA)Isochrysis galbana (TISO)Mixed diet (CHGRA:TISO, 50:50 by cell number)
Fatty acid composition (mol %)    
   14:0 7.3±1.1 14.2±0.4 11.0±0.4 
   16:0 9.3±0.6 11.9±0.6 10.7±0.1 
   18:0 1.5±0.3 1.5±0.2 1.5±0.2 
Σ SFA 19.4±1.3 29.0±0.1 24.6±0.6 
   16:1n-7 30.1±3.4 2.6±0.8 15.3±1.8 
   18:1n-9 0.9±0.3 16.5±3.9 9.3±2.1 
   18:1n-7 1.1±0.1 1.9±0.2 1.5±0.1 
Σ MUFA 33.9±3.5 24.7±1.1 29.0±1.1 
   16:2n-6 0.9±0.4 0.6±0.8 0.7±0.4 
   16:2n-4 4.1±0.5 0.6±0.4 2.2±0.3 
   18:2n-6 0.9±0.5 10.5±0.8 6.1±0.6 
   16:3n-4 10.4±2.0 0.0±0.0 4.8±0.8 
   18:3n-6 0.7±0.2 1.3±1.1 1.0±0.7 
   18:3n-3 0.3±0.3 5.9±3.4 3.3±1.7 
   18:4n-3 0.9±0.1 10.7±2.0 6.2±1.0 
   20:4n-6 2.6±0.7 0.7±0.4 1.6±0.4 
   20:5n-3 22.1±1.3 1.0±0.4 10.8±0.6 
   22:5n-6 0.2±0.4 2.2±0.5 1.3±0.4 
   22:6n-3 1.9±0.2 10.4±0.7 6.5±0.3 
Σ PUFA 46.7±2.9 45.8±1.0 46.1±0.9 
Unsaturation index 221.8±8.0 200.4±6.2 210.2±4.6 
Total fatty acids (nmol 10-6 cells) 5.6±1.0 6.5±1.0 6.1±1.0 
VariableChaetoceros gracilis (CHGRA)Isochrysis galbana (TISO)Mixed diet (CHGRA:TISO, 50:50 by cell number)
Fatty acid composition (mol %)    
   14:0 7.3±1.1 14.2±0.4 11.0±0.4 
   16:0 9.3±0.6 11.9±0.6 10.7±0.1 
   18:0 1.5±0.3 1.5±0.2 1.5±0.2 
Σ SFA 19.4±1.3 29.0±0.1 24.6±0.6 
   16:1n-7 30.1±3.4 2.6±0.8 15.3±1.8 
   18:1n-9 0.9±0.3 16.5±3.9 9.3±2.1 
   18:1n-7 1.1±0.1 1.9±0.2 1.5±0.1 
Σ MUFA 33.9±3.5 24.7±1.1 29.0±1.1 
   16:2n-6 0.9±0.4 0.6±0.8 0.7±0.4 
   16:2n-4 4.1±0.5 0.6±0.4 2.2±0.3 
   18:2n-6 0.9±0.5 10.5±0.8 6.1±0.6 
   16:3n-4 10.4±2.0 0.0±0.0 4.8±0.8 
   18:3n-6 0.7±0.2 1.3±1.1 1.0±0.7 
   18:3n-3 0.3±0.3 5.9±3.4 3.3±1.7 
   18:4n-3 0.9±0.1 10.7±2.0 6.2±1.0 
   20:4n-6 2.6±0.7 0.7±0.4 1.6±0.4 
   20:5n-3 22.1±1.3 1.0±0.4 10.8±0.6 
   22:5n-6 0.2±0.4 2.2±0.5 1.3±0.4 
   22:6n-3 1.9±0.2 10.4±0.7 6.5±0.3 
Σ PUFA 46.7±2.9 45.8±1.0 46.1±0.9 
Unsaturation index 221.8±8.0 200.4±6.2 210.2±4.6 
Total fatty acids (nmol 10-6 cells) 5.6±1.0 6.5±1.0 6.1±1.0 

Fatty acid composition is given as mol % of total fatty acid

The biochemical composition of the mixed diet was calculated from that of its individual constituents

All values represent the mean ± s.d., N=3 replicates

Only fatty acids contributing >1% in at least one species are reported

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