The study included 80 freshwater fish species belonging 23 families and 6 orders. The ratio of edible and inedible portion of the fishes varies from species to species and ranged from 1:0.25 in Lepidocephalus guntia to 1:1.45 in Rita rita. The highest protein, lipid and ash content of edible parts were 20.1, 17.8 and 4.4% in Labeo boga, Hilsa ilisha and Setipinna phasa respectively whereas these values for these parameters were 13.5, 1.3 and 1.0% in Chanda nama, Glossogobius giuris and Chanda reticulatus respectively. Considerable variation was observed in larger sized fishes of the same species. After a large analysis it is seen that indigenous carp had an average higher protein (17.2%) and lipid (6.6%) than those in exotic carps with values of 16.4% and 6.2% respectively. Fish eggs proved to contain a higher protein (20.0%) and lipid (13.0%). A classification based on the protein and oil content of the fish showed that most of the freshwater fishes of Bangladesh belong to high protein-medium oil group (15-20% protein and 5-15% oil). This finding indicates that fishes of such categories are suitable for long term preservation and making different value added fishery products like fish ball, fish burger, fish finger, surimi etc. in addition to its fresh consumption.
Chemical composition, proximate composition, freshwater, fishes.
Department of Fisheries Technology, BAU, Mymensingh-2202
1. To find out the major chemical composition/proximate composition i.e. moisture, crude protein, crude lipid and ash from mature fishes of
i. Small indigenous species (SIS) of fish of fresh water of Bangladesh.
ii. Other important large fresh water fish species and shell fishes.
2. To determine proportion of edible and inedible parts of the body, dressed yield, training losses, gonadosomatic index (GSI), in order to categories the fish for usage in different purposes depending on the profitability.
3. To determine the important micro-nutrients such as Calcium, Magnesium, Phosphorus, sodium, Potassium, etc. and some important vitamins.
4. To determine variation of proximate composition of fresh water small fishes as well as large fishes as a factor of the size and seasonal variation to get precise current/update information.
5. To determine the composition of major fatty acid and amino acid composition by using HPLC and other suitable methodology available in Bangladesh.
The main Methodology of the research Project have been given below:
a. Material:
b. Design of Experiments:
c. Procedure to be followed in achieving stated objectives:
d. Data collection
e. Data analysis.
Bangladesh Agricultural University Research Progress, Volume 13,
Proceedings of the Workshop 09-10 April 2003,
Bangladesh Agricultural University Research System (BAURES), Mymensingh
Bangladesh.
281845
From the analysis it shows that FW fish (edible) of Bangladesh is a high protein food and a significant portion of nutrition is lost through the inedible portion of fishes. Therefore, proper utilization of inedible portion can be made by making different fishery products and by-products e.g. fishmeal, poultry meal, fish fertilizer etc. The information will also help in preparation of a computer database on nutritional quality of freshwater fishes of Bangladesh. However, this work is not a complete one because all the FW fish species were not included in this study due to various limitations and therefore, needs further to be done.
Report/Proceedings