Table 2. Summary of dietary nutrient requirement and utilization (protein, EAA, lipid, EFA and energy) of catla, Catla catla
(% dry feed except otherwise mentioned)
Table 2a:
Protein requirement
Life stage	Requirement (%)
Larvae	45
Fry	35-45
Fingerlings	30-40
Grower	30
Broodstock	33
Table 2b
Essential amino acid (EAA)requirement
EAA	% of protein	% of diet�
Arginine	4.8	1.92
Histidine	2.45	0.98
Isoleucine	2.35	0.94
Leucine	3.7	1.48
Lysine	6.23	2.49
Methionine	3.55*	1.42
Phenylalanine	3.70**	1.48
Threonine	4.95	1.98
Tryptophan	0.95	0.38
Valine	3.55	1.42
*In absence of cystine; **With 1.0% tyrosine
Table 2c
Crude lipid, essential fatty acid (EFA) and energy
Nutrient level			Life stage/size class
		Larvae	Fry	Fingerling	Grower	Broodstock
Crude lipid, % min		8.0-10.0*	8.0-10.0	8.0-10.0	7.0-9.0	14
Essential fatty acids, % of total lipid						41.4
	18:2n-6	n-6				20.8
	20:4n-6		Combination of n-3 and n-6			3.6
	18:3n-3	n-3				2.5
	20:5n-3					5.2
	22:6n-3					2.7
Carbohydrate, % max		26	22-26	<30	22-26	20
Crude fibre, % max**
Gross energy, min kJ/g					3.49 kcal/g	19.88
Protein to energy ratio, mg/kJ				97.3-109
Energy to protein ratio			8.0-8.5	8.4
*4% phospholipids requirement has been demonstrated for catla larvae; **Empirical data not available, general acceptable level 6-10%
Data source: Singh and Bhanot (1988); Ravi and Devaraj (1991); Singh (1991); Sinha and Sinha (1994);  Seenappa and Devaraj (1995);
Nandi et al. (2001); ICAR (2006).