Keywords
fish oil
plant oil
substitution
lipid profile
kidney function
Abstract
The study was conducted to assess some lipid parameters and kidney function of African catfish Clarias gariepinus (4.50± 0.01g), fed six isonitrogenous and isocaloric diets containing different lipid resources. The sources of dietary lipids were fish oil (Control diet), coconut oil diet (CCO), olive oil diet (OLOD), crude palm oil diet (PMOD), sunflower oil diet (SFOD), and sesame oil diet (SSOD) incorporated at the 7 % level. Feeding trials were conducted in a floating hapa (1m3) system for 12 weeks. Results showed that different lipid sources in diets significantly (p < 0.05) increased the levels of total cholesterol, triglycerides, and low-density lipoprotein (LDL) cholesterol in all treated groups when compared with the initial levels. Significantly (p<0.05) higher value of high-density lipoprotein (HDL) cholesterol was observed in the group fed OLOD when compared with the control. For the atherogenic indices, a significant (p < 0.05) increase in HDL-cholesterol/Total cholesterol ratio was observed while LDL-cholesterol/HDL-cholesterol and log (TG/HDLCH) ratios significantly (p < 0.05) decreased in the OLOD group. Kidney function parameters: serum protein, albumin, and globulin increased significantly in the PMO group, whereas the level of albumin-globulin ratios was insignificant (p > 0.05) in all groups. Inferences from this study support the direct use of olive and crude palm oils as a total replacement for fish oil in catfish feed production. These findings may be of clinical importance to individuals at risk of cardiovascular disease for proper dietary planning.
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