Nutrient requirements of fish diets (as fed basis)

	Channel Catfish	Rainbow Trout	Pacific salmon	Common carp	Tilapia
Energy(kcal DE/kg diet)	3000	3600	3600	3200	3000
Crude Protein g/kg	320	380	380	350	320
Arginine	12	15	20.4	13.1	11.8
Histidine	4.2	7	6.1	6.4	4.8
Isoluecine	7.3	9	7.5	7.6	8.7
Luecine	9.8	14	13.3	10	9.5
Lysine	14.3	18	17	17.4	14.3
Methionine + Cystine	6.4	10	13.6	9.4	9
Phenylalanine + Tyrosine	14	18	17.3	19.8	15.5
Threonine	5.6	8	7.5	11.9	10.5
Tryptophan	1.4	2	1.7	2.4	2.8
Valine	8.4	12	10.9	11	7.8
n-3 fatty acids	5-10	10	10-20	10	-
n-6 fatty acids	-	10	-	10	5-10
Calcium	N	10 (estimate)	Not tested	Not tested	N
Phosphorus	4.5	6	6	6	5
Sodium	N	6 (estimate)	Not tested	Not tested	Not tested
Potassium	N	7	8	Not tested	Not tested
Chlorine	N	9 (estimate)	Not tested	Not tested	Not tested
Magnesium mg/kg	400	500	Not tested	500	600
Manganese	2.4	13	N	13	N
Zinc	20	30	N	30	20
Iron	30	60	Not tested	150	Not tested
Copper	5	3	Not tested	3	N
Selenium	0.25	.03	N	Not tested	Not tested
Iodine	1.1(estimate)	1.1	0.6-1.1	Not tested	Not tested
Vit A IU/kg	1000-2000	2500	2500	4000	Not tested
Vit D	500	2400	Not tested	Not tested	Not tested
Vit E	50	50	50	100	50
Vit K mg/kg	N	N	N	Not tested	Not tested
Riboflavin	9	4	7	7	6
Pantothenic acid	15	20	20	30	10
Niacin	14	10	N	28	Not tested
Vit B12	N	0.01 (estimate)	N	_	_
Choline	400	1000	800	500	Not tested
Biotin	N	0.15	N	1	Not tested
Folate	1.5	1	2	-	Not tested
Thiamin	1	1	N	0.5	Not tested
Vit B6	3	3	6	6	Not tested
Inositol	-	300	300	440	Not tested
Vit C	25-50	50	50	N	50
Note: These values represent near 100% bioavailability,as needs were determined with highly purified diets.
N - needed but quantity not determined. (-) - need not determined under experimental conditions