Table 1.

The average fatty acid compositions of phospholipids in brains of vertebrates

Fatty acid	Percentage of total
	Cold-blooded animals				Warm-blooded animals
	Boreal 5°C	Temperate 5°C	Temperate 22°C	Subtropic 26°C	Mammals 37°C	Birds 41°C
14:0	1.5  ± 0.4	0.7  ± 0.3	0.7  ± 0.3	0.7  ± 0.5	2.4  ± 1.0	0.5  ± 0.4
DMA16:0	1.7  ± 0.7	1.6  ± 0.8	1.4  ± 0.5	ND	3.5  ± 1.6	2.9  ± 1.2
16:0	15.9  ± 2.6	13.3  ± 2.2	15.6  ± 3.1	18.2  ± 3.8	13.1  ± 4.5	15.4  ± 1.2
16:1n-7	3.1  ± 2.2	7.1  ± 1.9	5.4  ± 2.1	19.4  ± 0.7	5.4  ± 2.1	1.3  ± 0.4
16:2	2.3  ± 1.0	ND	0.4  ± 0.3	1.0  ± 0.8	ND	ND
DMA18:0	2.1  ± 0.5	3.2  ± 1.6	3.1  ± 1.2	ND	3.5  ± 0.6	4.6  ± 0.5
DMA18:1	2.3  ± 1.0	2.9  ± 1.1	2.5  ± 1.5	ND	2.9  ± 0.9	1.5  ± 0.5
18:0	11.8  ± 5.2	8.7  ± 1.7	11.3  ± 2.8	10.4  ± 0.7	18.9  ± 2.7	18.1  ± 2.7
18:1n-9	20.5  ± 2.6	24.6  ± 3.4	23.5  ± 4.0	20.9  ± 5.6	17.6  ± 4.7	13.0  ± 2.5
18:2n-6	1.3  ± 0.5	0.5  ± 0.2	1.1  ± 0.7	0.7  ± 0.5	1.6  ± 0.8	1.3  ± 0.5
18:3n-3	ND	0.4  ± 0.2	0.3  ± 0.1	0.2  ± 0.1	0.7  ± 0.2	tr
20:1n-9	1.4  ± 0.3	0.8  ± 0.7	1.1  ± 0.8	0.3  ± 0.1	ND	ND
20:2n-6	ND	0.2  ± 0.1	1.0  ± 0.1	0.4  ± 0.2	ND	ND
20:3n-6	ND	0.5  ± 0.2	0.7  ± 0.5	0.6  ± 0.3	ND	ND
20:4n-6	2.5  ± 0.5	4.9  ± 1.4	4.8  ± 1.6	1.0  ± 0.7	9.5  ± 4.9	9.7  ± 2.7
20:5n-3	2.8  ± 1.8	1.8  ± 0.4	1.2  ± 0.6	1.3  ± 0.8	1.3  ± 0.4	0.2  ± 0.1
22:4n-6	ND	0.2  ± 0.1	0.6  ± 0.4	2.0  ± 0.2	3.2  ± 1.7	2.0  ± 1.0
22:5n-3	2.2  ± 2.1	0.7  ± 0.5	1.2  ± 0.6	1.1  ± 0.9	2.3  ± 0.7	2.6  ± 0.6
22:6n-3	20.2  ± 3.2	21.1  ± 2.5	17.7  ± 4.1	17.8  ± 3.6	13.1  ± 4.7	17.5  ± 2.7
24:1n-9	5.8  ± 2.7	4.2  ± 1.6	5.3  ± 1.9	3.2  ± 1.2	3.1  ± 0.4	3.5  ± 1.7

DMA, dimethyl acetate; ND, not detected; tr, trace, less than 0.1%.