Abstract
Proximate composition analysis for crude lipid content, crude protein content, moisture content, total ash content and dry weight of Dagaa (Rastrineobola argentea): a small pelagic fish which constitutes one of the main fish species in Lake Victoria was determined from selected beaches: Paga, Dunga, Rota, Usari and Nduru around Lake Victoria-Kenya. This was done with a view to provide nutritional data to guide food processing, industrial exploitation, preservation and consumption of the fish. On a wet weight basis (wwb), proximate composition values were established as crude protein content, kjedahl and biuret (19.1 - 21.7% and 1.93 - 5.80 mg/ml respectively), lipid content by Dyer and Bligh and Soxhlet (3.87 - 7.78 and 1.77 - 3.40% respectively), ash content (1.88 - 4.38%), ash content on a dry weight basis was (10 - 14.58%) and moisture content of (72.83 - 76.90%). Analysis of these results showed that there were significant differences (p < 0.01) in crude protein content, crude lipid content, total ash content and moisture content of Dagaa from the five landing sites. Hence, the inherent variations in Dagaa collected from the different landing sites were attributed to the difference in geographical locations of the sites. Dagaa was classified as a fatty fish (fat content >2%) based on Dyer and Bligh method. The high protein, ash and lipid content of Dagaa make it a nutritionally dense fish. Key words: Dagaa, Lake Victoria, proximate composition.
Highlights
In most third world countries, food insecurity is increasingly becoming an issue of national concern (Owaga et al, 2010)
The Dagaa was transported for 2 h via flight to the laboratory (Chiromo campus University of Nairobi, Kenya) in a cool box at 4°C, and each landing site sample divided into 200 g labeled batches and stored frozen at -20°C until analysis
This study aimed at determining the proximate composition of Dagaa (Rastrineobola argentea)
Summary
In most third world countries, food insecurity is increasingly becoming an issue of national concern (Owaga et al, 2010). Fish is an important food of high nutritive value. The fish industry has been identified as one of the sectors that if improved would effectively contribute towards alleviation of food insecurity (Owaga et al, 2010). This can be achieved by directly contributing as a food resource and through income and generation of employment (Baidu, 1997). Lake Sardine, locally known as “Dagaa” (Rastrineobola argentea) is a small pelagic fish
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