Abstract
The study carried out with a view to determining proximate and mineral composition of fish powder of five freshwater fish samples (Hypophthalmicthys molitrix, Labeo rohita, Cirrnina mrigala and Puntius sophore and small prawns). The samples collected from five local fish markets of Rajshahi city corporation were subjected to washing, gutting drying and grinding in order to make powder and homogenized sample which were preserved into plastic container for chemical analyses. All the activities were conducted in the laboratory of department of Fisheries, University of Rajshahi, Bangladesh. Major nutrient compositions of powder products such as protein, lipid, moisture, ash, carbohydrate, phosphorus, iron and calcium were estimated. Chemical compositions were found to vary among the species. The protein, lipid, moisture and ash content of five samples ranged from 54.31 (P. sophore) to 68.90% (small prawns), 13.33 (P. sophore) to 19.33% (L.rohita), 11.55 (L. rohita) to 13.95% (H. molitrix) and 0.16 (small prawns) to 0.44% (C. mrigala), respectively. The highest value of carbohydrate was 19.23% (P. sophore) and the lowest was 1.75% (C. mrigala). The calcium, iron and phosphorus content of the selected species varied from 2.49 (L. rohita) to 2.55g/kg (small prawns), 0.043 (H. molitrix and P. sophore) to 0.184g/kg (C. mrigala) and 0.94 (L. rohita) to 1.91g/kg (P.sophore), respectively.
Highlights
Dried fish is an important source of protein and most popular food item in Bangladesh
As dried fish is the raw material of fish powder, which is the rich source of nutrition, knowledge of nutritional composition of fish powder is essential in order to compare its value as food with other protein foods
The highest value of protein was found in small prawns (68.50%) and the lowest value was recorded in P. sophore (54.31%) (Figure 1)
Summary
Dried fish is an important source of protein and most popular food item in Bangladesh. It is relished by many people of coastal, central and North-eastern districts [1]. Many people of Bangladesh do not like dried fish for its fishy smell In view of this problem, fish powder, which is less likely to produce unpleasant fishy odour while incorporated in various food items, would be a potential source of protein and serve as a new approach adding new dimension in nutritional intake, which could turn out to be promising source with respect to mitigating nutritional deficiency. As dried fish is the raw material of fish powder, which is the rich source of nutrition, knowledge of nutritional composition of fish powder is essential in order to compare its value as food with other protein foods. People are confused to take required amount of calorie from fishes and fish products
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