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Studies on the Proximate Composition of Hilsa of Different Size Group at Chandpur Region

Bijon Kumar Dewan
Department of Fisheries Technology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Md. Sumon Mia
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh, Bangladesh

Farida Yeasmin
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh, Bangladesh

Sadhan Chandra Sarker
Senior Upazilla Fisheries Officer, Noakhali Sadar, Noakhali, Bangladesh

MNS Mamun Siddiky
Bangladesh Fisheries Research Institute, Brackishwater Station Paikgacha, Khulna, Bangladesh

Md. Kamal
Department of Fisheries Technology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Abstract/ Executive Summary:

Studies were conducted on the proximate composition of different size groups and body parts of hilsa of Chandpur region. Analysis of proximate composition was done at the Fisheries Technology laboratory, Bangladesh Agricultural University, Mymensingh. In this study the nutrient content varied greatly with age and size of the fish of same species. The protein and ash content was found to be more or less same in different size groups. However, there was an inverse relationship between the lipid and moisture content. The lipid content was increased gradually with increasing the size of fish, whereas the moisture content was decreased with increasing lipid content of different size group of hilsa. Protein content ranged from 17.61 to 18.55% with the highest value in adult and the lowest in Jatka (larvae and juveniles). Ash content ranged from 0.81 to 0.87%, moisture content ranged from 64.45 to 71.78% with the highest value in Jatka and the lowest value in Brood, while lipid content ranged from 9.37 to 16.15% with the highest value in Brood and the lowest in Jatka. It was also found that the protein content was highest in white muscle and lowest in viscera. The lipid content was highest in dark muscle, whereas the moisture content was found to be highest in viscera. However, the ash content was more or less same in different parts. From technological point of view, the high lipid content of dark muscle tissue is important because of problems with rancidity which is less suitable for preservation. Dark muscle also inhibits gel forming ability of muscle tissue which is an important characteristic of fish for heat treated textured foods. The moisture, protein, lipid and ash content of white muscle were 66.05, 18.23, 14.02 and 1.08% while in the dark muscle were 66.16, 17.54, 14.53 and 0.91%, respectively. On the other hand, in viscera, moisture, protein, lipid and ash content were 79.33, 14.27, 5.05 and 1.13%.

Keywords: Protein, Lipid, Moisture, Ash, Hilsa

Location: Chandpur region

Start Date: 00-06-2009

End Date: 00-12-2009

Program Area: Animal Health and Management

Commodity: Hilsa

Objectives:

To know the nutritional composition of Hilsa fish at different size groups and body parts.

Methodology:

Collection of Sample: Fresh Indian shad Tenualosa ilisa were procured from Chandpur landing center during the month from (June to December)/2009. The fish were packed in layered ice (1:1, w/w) in a polystyrene insulated box and transported to the Bangladesh Agricultural University, Mymensingh. The box was provided with holes at the bottom to drain out melting water. Stowage in the box of a bottom layer of about 5 cm. in crusted ice and then layers of fish sprinkled with ice and a top layer of ice again of about 5 cm. Preparation of sample: The collected fish samples were washed properly with fresh water to remove all dirts, slime, and unnecessary particles. Then the fishes were separated according to size. The fishes were categorized into Jatka (Length: <23cm, Weight: 10 to 130 gm) Sub-adult (Length: 24 to 37 cm, Weight: 150 to 600 gm), Adult (Length: 38 cm and above, Weight: 700 gm and above) and Brood (Length: 38 cm and above, Weight: 700 gm and above). Then each category fish was cut by sharp knife and ground in a mechanical grinder to make a paste. This ground sample was used for all biochemical analysis. Analysis of sample: Proximate analysis such as moisture, ash, lipid and crude protein contents were carried out following the methods of AOAC.

Source of Information: International Journal of Natural and Social Sciences, 2015, 2(5): 52-55 ISSN: 2313-4461

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The protein content was highest in white muscle and lowest in viscera. The lipid content was highest in dark muscle, whereas the moisture content was found to be highest in viscera. However, the ash content was more or less same in different parts

Knowledge Management: Journal