Table 15. Dietary nutritional deficiency symptoms ascribed to  essential amino acid (EAA) and fatty acid (EFA)
EAA/EFA	Deficiency symptoms
EAA
Lysine
Methionine	Lower weight gains and feed efficiency ratios as well as slightly higher hepatosomatic indices (a)
Typtophan	Reduced growth (b)�
Essential fatty acid	Pale color, Erratic swim, �Faint� behaviour, mortality (c); Reddening of the fins, abnormal appearance of eyes, swollen and pale liver (d)
Data source: (a) Coloso et al. (1999); (b) Coloso et al. (2004); (c) Dhert et al. (1990), Rimmer et al. (1994); (d) Wanakowat et al. (1993)