Nutritional evaluation, functional properties and anti-nutritional factors of Macrobrachium rosenbergii, an underutilized animal
Department of Zoology, University of Ado-Ekiti, P.M.B. 5363, Ado-Ekiti, Ekiti State, Nigeria
Omotoso, O.T., Department of Zoology, University of Ado-Ekiti, P.M.B. 5363, Ado-Ekiti, Ekiti State, Nigeria; Afolabi, O., Department of Zoology, University of Ado-Ekiti, P.M.B. 5363, Ado-Ekiti, Ekiti State, Nigeria
The proximate, nutritionally valuable minerals, functional and anti-nutritional factors of Macrobrachium rosenbergii were determined in the laboratory for human consumption. Results indicated a high protein content (68.88 ± 0.56%), ash (15.33 ±0.14%), moisture (9.37 ±0.03%), fat (5.36 ±0.01%) and carbohydrate (1.06 ±0.00%), while fibre was not detected. Protein solubility was pH dependent with minimum and maximum protein solubilities at pH 2, pH 6 and pH 11. Nutritionally valuable mineral analyses showed that M. rosenbergii contains phosphorus (126.18 ±0.032 mg/100 g), magnesium (86.44 ±0.10 mg/100 g), potassium (64.24 ±0.20 mg/100 g), sodium (57.53 ±0.15 mg/100 g), calcium (49.54 ±0.11 mg/100 g), iron (7.20 ±0.02 mg/100 g), manganese (0.89 ±0.01 mg/100 g) and zinc (0.69 ±0.01 mg/100 g). Copper, cobalt, lead, nickel and chromium were not detected. The sample had a minimum gelation concentration of (8.5 ±0.10%), water absorption capacity (345.00 ±0.30%), oil absorption capacity (521.36 ±0.12%), foaming capacity (15.00 ±0.05%), foaming stability (2.20 ±0.01%, emulsion capacity (22.62 ±0.03%) and emulsion stability (45.50 ± 0.15). Three anti-nutrients were determined: phytic acid was 4.00 ±0.01 mg/100 g, oxalate 1.05 ±0.00 mg/100 g while tannin was not detected.
