Table 1.

Composition of the diets. Protein, fat, fibre, ash and energy content of the diets as provided by the manufacturer. SFA, MUFA and PUFA proportions in the experimental diets (given as percentage of total fatty acids) measured by gas chromatography.

		1:8 diet	1:1 diet	5:1 diet
Crude protein (%)		24.4	24.4	24.4
Crude fat (%)		34.6	34.6	34.6
Crude fibre (%)		6.0	6.0	6.0
Crude ash (%)		5.4	5.5	5.5
Metabolizable energy (MJ/kg)		21.6	21.5	21.5
SFA (% of total fatty acids)	C12:0	0.09	0.11	0.18
	C14:0	3.03	3.71	5.18
	C15:0	0.46	0.51	0.52
	C16:0	26.18	26.34	21.03
	C17:0	1.07	1.09	0.80
	C18:0	21.89	21.11	12.88
	C20:0	<0.01	<0.01	<0.01
	C22:0	<0.01	<0.01	<0.01
	Sum SFAa	53.19	53.32	41.33
MUFA (% of total fatty acids)	C16:1cis-9	2.84	3.60	5.39
	C18:1cis-9	31.58	29.79	19.17
	C18:1cis-11	1.30	1.49	2.18
	C18:1trans-11	1.82	1.88	0.88
	Sum MUFAb	38.81	38.19	29.30
PUFA (% of total fatty acids)	C18:2n-6 (LA)	6.68	2.58	2.99
	C18:3n-3 (ALA)	0.92	0.38	0.79
	C18:3n-6	<0.01	<0.01	<0.01
	C20:2n-6	<0.01	<0.01	<0.01
	C20:3n-6	<0.01	<0.01	<0.01
	C20:4n-6	<0.01	<0.01	<0.01
	C20:5n-3 (EPA)	<0.01	2.86	14.00
	C22:4n-6	0.04	0.10	0.22
	C22:5n-3	<0.01	<0.01	<0.01
	C22:6n-3 (DHA)	<0.01	1.58	7.70
	Sum PUFAc	8.00	8.48	29.37
	Sum n-3 PUFAd	0.94	5.28	24.69
	Sum n-6 PUFAe	6.79	2.93	4.51

^aSum SFA: 10:0+11:0+12:0+13:0+14:0+15:0+16:0+17:0+18:0+20:0+21:0+22:0+23:0+24:0.

^bSum MUFA: 14:1+15:1+16:1+17:1+18:1t+18:1c9+C18:1c11+C22:1+C24:1.

^cSum PUFA: 18:2tr-9,tr-12+18:2n-6+18:3n-3+18:4n-3+20:3n-6+20:4n-6+20:5n-3+22:1+22:4n-6+22:5n-3+22:6n-3+c9,tr11CLA+18:3n-6+20:2n-6+20:3n-3+22:2n-6.

^dSum n-3 PUFA: 20:3n-3+22:6n-3+22:5n-3+20:5n-3+18:4n-3+18:3n-3.

^eSum n-6 PUFA: 22:2n-6+20:2n-6+18:3n-6+22:4n-6+20:3n-6+18:2n-6+20:4n-6.

MUFA, monounsaturated fatty acid; PUFA, polyunsaturated fatty acid; SFA, saturated fatty acid.