Extraction and quality evaluation of yellowfin tuna bone powder
Extraction and quality evaluation of yellowfin tuna bone powder
Date
2014
Authors
Murthy, L.M.
Rao, B.M.
Asha, K.K.
Prasad, M.M.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)
Abstract
Commercial processing of tuna either as canned tuna
or tuna loins generates considerable quantities of
waste and a sizeable quantity of this waste constitutes
bones. Yellowfin tuna bone was prepared by
three methods viz., by using 0.5% KOH, 1% KOH
and 0.5% NaOH and the proximate analysis, elemental
composition and fatty acid composition were
evaluated in comparison to control prepared without
the addition of alkali. The powder was found
rich in calcium (19 400 to 26 300 mg 100 g-1) and
phosphorus (7797 to 8291 mg 100 g-1) with calciumphosphorus
ratio ranging between 2.5 and 3.3:1. The
proportion of polyunsaturated fatty acids (PUFA),
particularly, docosahexaenoic acid (DHA) content
was distinctly higher in tuna bone powder prepared
after boiling in 0.5% KOH. Palmitic acid, oleic acid
and DHA were the common saturated fatty acid,
monounsaturated fatty acid and polyunsaturated
fatty acid respectively. Heavy metals like Cd and Hg
were not detected in the developed bone powder.
Description
Keywords
Yellowfin tuna, Thunnus albacares, bone power, waste utilization
Citation
Fishery Technology 2014: 51 (1), 38-42