Utilization of carbohydrates in warmwater fish-with particular reference to tilapia, Oreochromis niloticus × O. aureus.
Recent work on carbohydrate utilization in fish and the factors responsible for its poor utilization are reviewed. Intestinal absorption of carbohydrate is low when diets contain fibre. Meal frequency affects carbohydrate utilization in fish as some metabolic enzymes are altered due to changes in meal frequency. Niacin requirement appears to vary depending on the source of carbohydrate in tilapia. The ability of fish to utilize certain carbohydrates changes with size or age. Complex carbohydrates such as starch and dextrin can spare some protein when dietary protein level is low. Cr supplementation improves glucose utilization by tilapia, and Cr2O3 supplementation is more effective than other Cr forms.