Immunogenic,
methionine copper-induced response had proven to be
precedent in providing resistance against certain diseases in fish.
This study allocates the fitness strategy for
Oreochromis
niloticus
by introducing and incorporating the well-designed,
stabilized, and biocompatible
N
-carbamoyl-methionine
copper (NCM-Cu) as a Cu potent source in diet that enhances the bioavailability
and fitness. The synchronized NCM-Cu complex was characterized by
directing ultraviolet and visible spectrophotometry (UV–vis),
Fourier-transform infrared (FTIR), X-ray diffractometry (XRD), thermogravimetric
analysis (TGA), and single-crystal X-ray diffraction. Results revealed
blue columnar crystalline, NCM-Cu complex with an empirical formula
as C
12
H
30
CuN
4
O
10
S
2
. Anonymously, the overall growth performance of the fish
remained unaltered with NCM-Cu adjunct feed. NCM-Cu significantly
raised the Cu accumulation in the fish muscles, liver, gill, and intestine
in contrast to the basic Cu-rich feed. The serum antioxidant enzyme
activity elevated up to (ceruloplasmin: 19.38 U/L) and the lowest
liver malondialdehyde (MDA) content (8.81 nmol/mg prot.) and triglyceride
content (0.39 nmol/g prot.) were observed in the NCM-Cu group as compared
to the basic Cu and CuSO
4
groups, suggesting that NCM-Cu
promoted antioxidative responses and alleviated lipid peroxidation
of
O. niloticus
. Overweening, the synthesized
complex, NCM-Cu significantly regulated the expression levels of lysozyme,
immunoglobulin M, complement 4, and complement 3 up to 10.93 U/mL,
0.72, 0.77, and 1.18 mg/mL in serum, respectively. Thus, such endorsed
results reveal the preeminence of NCM-Cu-supplemented diet for the
fitness in
O. niloticus
.