TABLE 7.

Fatty acid proportion (% of total fatty acids) in the breast muscle of 41 days-old broiler chickens raised in either thermoneutral (TNT) or chronic heat stress (HS) conditions (N = 12/group) from 35 to 41 days of age.

	TN	HS	SEM	p-value
C14:0	0.33	0.31	0.16	ns
C16:0	18.6	17.8	0.51	ns
C17:0	0.25	0.27	0.02	ns
C18:0	8.49	8.62	0.45	ns
C24:0	0.13	0.16	0.14	ns
ΣSFA	27.8	27.2	0.62	ns
C14:1	0.06	0.06	0.01	ns
C16:1	2.40	2.46	0.20	ns
C17:1	0.14	0.17	0.01	ns
C18:1 n-9	26.6	26.0	0.84	ns
C18:1 cis11	2.23	2.13	0.06	ns
C24:1	0.01	0.01	0.01	ns
ΣMUFA	31.5	30.9	0.97	ns
C18:2 n-6 [LA]	28.6	28.3	0.43	ns
C18:3 n-6 [GLA]	0.26	0.29	0.02	ns
C20:4 n-6 [AA]	4.22	4.81	0.51	ns
C22:4 n-6	0.05	0.03	0.32	ns
C22:5 n-6	0.06	0.08	0.05	ns
Σn-6	33.2	33.5	0.48	ns
C18:3 n-3 [ALA]	2.41	2.57	0.09	ns
C18:4 n-3	0.15	0.05	0.05	ns
C20:3 n-3	0.13	0.10	0.02	ns
C20:5 n-3 [EPA]	1.07	1.24	0.14	ns
C22:5 n-3 [DPA]	0.86	1.01	0.11	ns
C22:6 n-3 [DHA]	0.39	0.54	0.06	ns
Σn-3	5.03	5.53	0.28	ns
ΣPUFA	39.1	39.9	0.80	ns
n-6/n-3	6.86	6.19	0.27	ns
Others	1.69	1.89	0.08	ns

ns = not significant.

SEM, standard error of the mean.

LA, linoleic acid; GLA, gamma-linolenic acid; AA, arachidonic acid; ALA, alpha-linolenic acid; EPA, eicosapentaenoic acid; DHA, docosahexaenoic acid.