Table 4. Concentrations of malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) in catfish gill, liver, kidney, and heart tissues across control and experimental groups

Treatments	MDA (nmol/g protein)				H₂O₂ (nmol/g protein)
Treatments	Gill	Liver	Kidney	Heat	Gill	Liver	Kidney	Heat
Control group	53.71 ± 2.91^a	69.82 ± 3.19^a	63.47 ± 3.13^a	58.18 ± 2.86^a	23.47 ± 1.58^a	30.51 ± 2.14^a	28.16 ± 2.12^a	25.82 ± 1.13^a
Untreated group	80.57 ± 3.46^e	104.73 ± 5.36^e	95.21 ± 4.71^e	87.27 ± 3.57^e	35.21 ± 2.29^d	45.77 ± 3.22^d	42.24 ± 3.21^d	38.73 ± 2.23^d
Formalin group	56.39 ± 2.72^ab	73.31 ± 3.51^ab	66.64 ± 3.26^ab	61.09 ± 2.91^ab	24.64 ± 1.18^ab	32.04 ± 2.13^ab	29.57 ± 1.15^ab	27.11 ± 1.35^ab
MAEE800 group	65.53 ± 2.84^d	85.18 ± 3.44^cd	77.43 ± 3.24^d	70.98 ± 2.94^d	28.63 ± 1.14^c	37.22 ± 2.69^c	34.35 ± 2.55^c	31.51 ± 2.29^c
MAEE900 group	61.77 ± 1.97^c	80.29 ± 3.44^cd	72.99 ± 3.24^cd	66.91 ± 2.56^c	26.99 ± 1.81^bc	35.09 ± 3.15^bc	32.38 ± 2.81^bc	29.69 ± 2.26^bc
MAEE1000 group	58.01 ± 2.29^b	75.41 ± 3.65^bc	68.55 ± 2.95^bc	62.83 ± 2.74^b	25.35 ± 1.68^ab	32.95 ± 2.86^ab	30.41 ± 2.39^ab	27.89 ± 2.19^ab

The values are expressed as mean ± SD, where the letters indicate differences between treatments (p < 0.05).
MAEE, M. azedarach leaf ethanol extract.