WORLD JOURNAL OF ADVANCE
HEALTHCARE RESEARCH

Md. Shofikul Islam, Md. Abul Mansur*, M. N. Haider, Daisuke Kimura and Misa Ogushi

ABSTRACT

This research is the part of our research project No, 2021/1085/BAU and 2023/1948/BAU. In this part we studied the seasonal variation in nutritional composition, quality and heavy metal concentration of Giant Freshwater Prawn (Macrobrachium rosenbergii) available in the Mymensingh district of Bangladesh. In doing so the composition (% Protein, % lipid, % ash, % moisture, amino acid content, fatty acid profile), quality (TVBN and TMAN) and heavy metal (Cd, Cr, Pb, Cu, Zn) concentration was estimated in different seasons of the year by a series of laboratory experiments. .Noticeable change in the quantity of protein, lipid, ash in Macrobrachium rosenbergii in different seasons was apparent. Protein content was 18.5% in autumn, 11.75% in winter, 14.91% in spring, 15.5% in summer, 14.23% in rainy season. Lipid content was 2.15% in autumn and winter, 2.18% in spring, 2.04% in summer, 1.30% in rainy season. Ash content was 1.24% in autumn, 1.44% in winter, 0.89% in spring, 1.12% in summer, 1.59% in rainy season. Remarkable change in amino acid content in different seasons in Macrobrachium rosenbergii was observed from the result of laboratory experiments. Most of the essential amino acids were detected and estimated in different seasons of the year except tryptophane. Highest variation in quantity was observed in Glutamic acid which was 33.38 mg/g in winter, 133.91 mg/g in spring, 126.70 mg/g in summer. Appreciable quantities of essential amino acids are present in Macrobrachium rosenbergii but in general amino acid content was highest in spring season. Overall quality of Macrobrachium rosenbergii was assessed by the parameters TVBN and TMAN. Significant difference in TVBN was observed in different seasons but the values remained within the acceptable limit (<30 mg/100g). Similarly TMAN value was different in various seasons but remained within the acceptable limit (<10 mg/100g). Significant difference in heavy metal concentration in the flesh of Macrobrachium rosenbergii was observed in different seasons, some heavy metals were above maximum allowable limit. In general heavy metal concentration was less in spring and summer season. Fatty acid profile of the lipid of Macrobrachium rosenbergii was also studied. In general lipid contains 75.4% unsaturated fatty acids of total fatty acids. Appreciable quantity of EPA (14.82% in spring) and DHA (5.99% in spring) was estimated in the unsaturated fatty acids of Macrobrachium rosenbergii. Poly-phenol content and antioxidant capacity of Macrobrachium rosenbergii were also detected and estimated by laboratory analysis in winter season. Poly-phenol content was 32.3μmol/100g DW and antioxidant capacity was 125.9 μg/g.

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