Table 3.

Serum biochemical changes of Nile tilapia fed diets with different levels of L. caspica.

Parameters	Day 25				Day 50				Interaction
	Control	0.5%	1%	2%	Control	0.5%	1%	2%
ALP (U/L)	51.0 ± 3.80aA	68.75 ± 19.13aA	48.0 ± 1.80aA	72.25 ± 8.40aA	53.65 ± 2.60aA	91.25 ± 8.56bA	99.6 ± 4.11bB	104.25 ± 4.87bB	P = 0.0012
ALT (U/L)	3.80 ± 0.30aA	4.94 ± 0.52aA	3.43 ± 0.31aA	5.78 ± 1.57aA	4.80 ± 0.26aA	6.01 ± 0.20aA	5.62 ± 0.08aB	9.80 ± 1.11bB	P = 0081
AST (U/L)	240 ± 2.00aA	155.6 ± 18.50aA	214.67 ± 41.28aA	187.3 ± 28.71aA	269.3 ± 27.01aA	231.3 ± 6.03aA	305 ± 122.05aA	357 ± 136.52aA	NS (P = 0.3778)

Data are provided as mean ± SD (n = 9 fish per treatment). Different letters in the same rows produce drastically different means. Means in rows with identical lettering do not substantially vary (P > 0.05). Significantly different (P < 0.05) are the main effects of time on the means of rows with different capital letters. ALT, alanine aminotransferase; AST, aspartate aminotransferase.