Abstract:
ABSTRACT
The percentage yield, fillet chemical composition and mineral
elements of wild and farmed male and female African catfish Clarias
gariepinus are presented. Farmed males yielded 42.73% fillets
compared to 49.86% for wild males, 51.11% for wild females and 46.86%
for farmed females. Female gonadal mass strongly influences dressout
percentage.
Result of proximate composition as percentage in moisture, fat,
ash, crude protein, dry matter, nitrogen free extract were examined as
parameters of fish flesh quality in both farmed and wild sample. The
fillets of both farmed and wild males and females have significantly
different in moisture (72.8% and 75%), dry matter (26.7% and
25%), protein (30.9% and 30.9%), Ether extract (8.4% and 8.1%), ash
(1.7% and1.3%), nitrogen free extract (31.9 % and 34.5%) farmed and
wild. But the chemical composition profiles within type were not
influenced by sex.
Levels of the Macro elements (mg/l), phosphorus, potassium,
manganese, sodium and calcium, and micro elements (mg/l), iron and
Zinc different significantly between type and between sexes within type.
No significantly differences were noted for calcium, magnesium, zinc,
iron and potassium .The mineral content of Clarias gariepinus
fillets; farmed and wild (mg/L wet weight fillet) as percentage is Ca
(4.02 and 4.32); P (2.87 and 2.80); Mg (2.65 and 2.56); Na (4.32 and
4.34); K (3.76 and 4.07); Fe (1.72 and 1.09) and Zn (0.096 and 0.097),
Standard method of AOAC (1990).
