Effects of Protein, Lipid, Feeding Levels and Their Interaction ... 73Bars are mean SE of three replications; bars without a common superscript are
significantly different (p < 0.05).
Figure 3. Blood plasma concentrations of triglycerides, cholesterol, glucose, and
plasma total protein in O. niloticus reared under different levels of protein, lipid and
feeding levels. A = CP35CL8,100; B = CP35CL8,70; C = CP35CL12,100;
D = CP35CL12,70; E = CP25CL8,100; F = CP25CL12,100; G=CP25CL8,70;
H = CP35CL8,50; I = CP35CL12,50; J = CP25CL12,70; K = CP25CL12,50.
The main effects of crude protein, crude lipid and feeding rate on
biological parameters at the end of 4 months are shown in Table 5. Lower
crude protein level enhanced significantly higher (p < 0.0001) values for HSI
and IPF whereas high crude protein level enhanced significantly lower values.
Crude protein level had no significant (p > 0.05) influence on VSI and ILR.
High crude lipid level gained significantly (p < 0.05) higher VSI, HSI and IPF
while low crude lipid got significantly (p > 0.05) lower values. Crude lipid
level had no significant (p > 0.05) effects ILR. High feeding rate had
significantly (p < 0.05) higher values of VSI and IPF while medium and low
feeding rates had significantly (p > 0.05) lower values. High feeding rate
enhanced significantly (p < 0.05) higher value of HSI but it was not
significantly (p > 0.05) different from the medium feeding. On the other hand,
low feeding rate enhanced significantly (p < 0.05) lower value but it was also