Table 2.

Average relative concentration of lipids across the different song nuclei. Relative concentrations are compared using a single factor ANOVA (n=3 birds), for the data within each row, i.e., the variation in signal among nuclei for a specific lipid. Data can also be compared within a single column for relative peak area for different lipids within a single brain area, but peak areas for different lipids are not necessarily proportional to their relative concentrations due to differences in ionization and detection.

Lipid	RA	LMAN	DLM	HVC	NCM	CMM	AreaX
Myristic acid; 14:0	1.2	1.7	1.2	1.8	1.0	1.4	1.0
Palmitoleic acid; 16:1 n-7**	2.9	3.5	2.6	3.1	2.4	2.7	2.6
Palmitic acid; 16:0	39.3	31.4	29.9	33.4	27.6	29.0	33.2
Linoleic acid; 18:2 n-6	2.2	3.0	2.9	2.7	2.1	2.5	2.5
Oleic acid; 18:1 n-9*	20.5	24.2	20.1	21.0	17.7	17.7	17.7
Stearic acid; 18:0**	19.7	17.9	27.3	21.8	23.4	23.9	21.6
Eicosapentaenoic acid; 20:5 n-3**	0.4	0.5	0.4	0.5	1.5	1.2	0.8
Arachidonic acid; 20:4 n-6***	2.4	3.1	2.5	3.1	9.3	6.2	4.9
8,11,14-Eicosatrienoic acid; 20:3n-6*	0.9	1.6	1.1	1.2	1.5	1.5	1.4
11,14-Eicosenoic acid; 20:2 n-6	0.9	1.0	0.9	1.0	0.8	1.0	0.8
11-Eicosenoic acid; 20:1 n-9*	1.0	1.2	1.4	1.1	0.7	0.8	0.8
Docosahexaenoic acid; 22:6 n-3	1.1	1.7	1.5	0.9	1.1	1.1	1.4
Adrenic acid; 22:4 n-6*	0.6	1.3	0.9	0.8	1.0	0.9	0.9
Cholesterol	6.7	8.0	7.4	7.5	10.0	10.2	10.5

^*denotes p-value < 0.05

^**p-value < 0.01

^***p-value < 0.0001.