Table 2. Summary of dietary nutrient requirement and utilization (protein, EAA, lipid, EFA and energy) of rohu, Labeo rohita (% dry feed except otherwise mentioned)
|
Crude protein requirement |
|
|
Life stage |
Requirement (%) |
|
Larvae |
35-45 |
|
Fry |
35-45 |
|
Fingerling |
30-40 |
|
Juvenile |
30-35 |
|
Grower |
25-30 |
|
Broodstock |
25-30 |
|
Essential amino acid (EAA)requirement |
||
|
EAA |
% of protein |
% of diet |
|
Arginine |
5.75 |
2.30 |
|
Histidine |
2.25 |
0.90 |
|
Isoleucine |
3.00 |
1.20 |
|
Leucine |
3.75 |
1.50 |
|
Lysine |
5.68 |
2.27 |
|
Methionine |
2.88 |
1.42 |
|
Phenylalanine |
4.00 |
1.48 |
|
Threonine |
4.28 |
1.71 |
|
Tryptophan |
1.13 |
0.45 |
|
Valine |
3.75 |
1.50 |
|
Crude lipid, essential fatty acid (EFA) and energy |
|||
|
Nutrients |
Life stage/size class |
||
|
|
|
Fry |
Fingerling |
|
Crude lipid, % min |
5-15 |
5-15 |
|
|
Essential fatty acids, % min* |
|
|
|
|
|
n3 |
1 |
1 |
|
Phospholipid,% min |
|
4 |
|
|
Carbohydrate, % max |
45 |
35-40 |
|
|
Metabolizable energy (kcal/100g) |
|
379.7-400.0 |
|
|
Protein to energy ratio, mg/kcal |
113 |
95.0-107.8 |
|
*Supplementation of broodstock diet with n-3 and n-6 PUFA has been reported to positively influence gonadal development, egg quality and larval survival