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Table 2.

Characteristics of the neutral lipids in digestive glands of mussels Mytilus edulis and oysters Crassostrea virginica sampled on 17 January before exposure to overwintering temperatures

VariableMusselOysterP
Triglyceride (mg g-1 AFDM) 57.1±20.4 15.3±5.7 NS 
Fatty acid (mol %)    
   14:0 5.7±0.2 3.0±0.3 ** 
   15:0 0.6±0.1 1.0±0.2 NS 
   16:0 14.3±0.9 23.2±1.1 * 
   17:0 0.8±0.0 1.7±0.1 * 
   18:0 2.0±0.1 3.2±0.7 NS 
Σ SFA 23.5±1.2 32.2±1.7 * 
   16:1n-7 11.5±0.0 4.1±0.6 ** 
   16:1n-5 0.4±0.0 0.4±0.1 NS 
   18:1n-9 3.2±0.1 6.0±0.1 ** 
   18:1n-7 3.0±0.2 2.8±0.2 NS 
   20:1n-11 0.8±0.0 1.4±0.1 * 
   20:1n-9 1.5±0.4 0.9±0.2 NS 
   20:1n-7 1.0±0.0 3.9±0.1 ** 
Σ MUFA 22.4±0.6 21.2±1.2 NS 
   16:2n-4 1.5±0.0 0.2±0.1 ** 
   16:2n-6 1.0±0.1 0.9±0.1 NS 
   18:2n-6 2.5±0.0 2.5±0.2 NS 
   20:2NMIi,j 1.3±0.1 2.6±0.4 NS 
   22:2NMIi,j 1.1±0.0 3.3±0.2 ** 
   18:3n-3 2.6±0.1 3.1±0.6 NS 
   18:4n-3 5.8±0.2 4.7±0.8 NS 
   20:4n-6 1.6±0.0 2.0±0.2 NS 
   20:5n-3 19.1±1.5 12.1±0.2 * 
   21:5n-3 1.6±0.0 0.7±0.2 * 
   22:5n-6 0.5±0.0 0.5±0.0 NS 
   22:5n-3 0.7±0.0 0.8±0.1 NS 
   22:6n-3 11.1±0.0 10.1±0.8 NS 
Σ PUFA 53.5±1.8 45.9±0.7 * 
Unsaturation index 259.9±7.6 215.6±0.7 * 
VariableMusselOysterP
Triglyceride (mg g-1 AFDM) 57.1±20.4 15.3±5.7 NS 
Fatty acid (mol %)    
   14:0 5.7±0.2 3.0±0.3 ** 
   15:0 0.6±0.1 1.0±0.2 NS 
   16:0 14.3±0.9 23.2±1.1 * 
   17:0 0.8±0.0 1.7±0.1 * 
   18:0 2.0±0.1 3.2±0.7 NS 
Σ SFA 23.5±1.2 32.2±1.7 * 
   16:1n-7 11.5±0.0 4.1±0.6 ** 
   16:1n-5 0.4±0.0 0.4±0.1 NS 
   18:1n-9 3.2±0.1 6.0±0.1 ** 
   18:1n-7 3.0±0.2 2.8±0.2 NS 
   20:1n-11 0.8±0.0 1.4±0.1 * 
   20:1n-9 1.5±0.4 0.9±0.2 NS 
   20:1n-7 1.0±0.0 3.9±0.1 ** 
Σ MUFA 22.4±0.6 21.2±1.2 NS 
   16:2n-4 1.5±0.0 0.2±0.1 ** 
   16:2n-6 1.0±0.1 0.9±0.1 NS 
   18:2n-6 2.5±0.0 2.5±0.2 NS 
   20:2NMIi,j 1.3±0.1 2.6±0.4 NS 
   22:2NMIi,j 1.1±0.0 3.3±0.2 ** 
   18:3n-3 2.6±0.1 3.1±0.6 NS 
   18:4n-3 5.8±0.2 4.7±0.8 NS 
   20:4n-6 1.6±0.0 2.0±0.2 NS 
   20:5n-3 19.1±1.5 12.1±0.2 * 
   21:5n-3 1.6±0.0 0.7±0.2 * 
   22:5n-6 0.5±0.0 0.5±0.0 NS 
   22:5n-3 0.7±0.0 0.8±0.1 NS 
   22:6n-3 11.1±0.0 10.1±0.8 NS 
Σ PUFA 53.5±1.8 45.9±0.7 * 
Unsaturation index 259.9±7.6 215.6±0.7 * 

All values represent the mean ± s.d.; N=3 replicate tanks,2 animals per tank were sampled

Only fatty acids contributing >1% in at least one combination of treatment are reported

*

Significant differences (P<0.05)

**

highly significant differences (P<0.01); NS, no significant difference

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