Seasonal variation of proximate compositions and mineral contents (Ca and P) in edible part of giant freshwater prawn, macrobrachium rosenbergii (de Man, 1 879)

Abstract

The present investigations were conceded on the seasonal variations of proximate compositions and mineral contents (Ca and P) in edible-part of Macrobrachium rosenbergii which were collected during May 2003 to April 2004 from Dhaka New Market. It was found that the maximum level of moisture content was in autumn (80.37 ± 0.72 g/100 g) while minimum was in winter (76.99 ± 0.33 g/100 g); the protein content was maximum in winter (21.30 ± 0.70 g/100 g), while minimum was in autumn (18.03 ± 0.26 g/100 g); the fat content was maximum in winter (2.99 ± 0.02 g/100 g), while minimum was in autumn (1.07 ± 0.06 g/100 g) and the ash content was maximum in autumn (2.00 ± 0.20 g/100 g) and minimum in winter (1.21 ± 0.04 g/100 g). In mineral content analysis, it was found that the calcium content was maximum in autumn (210.00 ± 10.00 mg/l00 g) while minimum in winter (144.00 ± 12.17 mg/100 g) and the phosphorus content was maximum in summer (102.00 ± 4.00 mg/100 g) while minimum in autumn (83.33 ± 6.11 mg/100 g). All parameters varied seasonally.