Abstract:
Family Siganidae is considered to be an economically and nutritionally important species in Sri
Lanka. The knowledge on their chemical composition of bone could help us to cure various
diseases such as Osteoporosis as it could be applied as an ingredient of indigenous medicine. The
studies related to the proximate and mineral composition of fishbone of Siganus lineatus are
meagre in Sri Lanka. Hence, the present study was aimed to analyze the proximate and mineral of
the fishbone powder of S. lineatus. 20-25cm total length of fish samples were collected from the
Jaffna Lagoon from December 2019 to February 2020. The samples were cleaned, boiled and
treated in order to achieve treated fish bone for production of powder form. The proximate
compositions such as ash, protein, moisture and lipid content of the S. lineatus bone were
determined by the standard AOAC methods. The mineral compositions such as Calcium (Ca),
Sodium (Na) and Potassium (K) were determined by digital flame photometer and Phosphorus (P)
by multiparameter photometer by the standard AOAC methods. The ash, protein, moisture and
lipid content values were 50.74±0.65%, 22.07±0.29%, 6.29±0.35% and 3.50±0.16% in fishbone of
Siganus lineatus respectively. The mineral composition of Ca, P, K and Na were 12.5%, 7.66%.
0.42% and 0.36%, respectively and the ratio of calcium: phosphorus is found to as 2:1. The present
study showed relatively higher ash content. Therefore it is one of the method could be used to
analyze the mineral content from fishbone. The results demonstrated that the fish bone powder was
nutritious and can contribute towards the calcium deficient diseases and can be recommended for
the clinical research studies as an important human health monitoring agent, in the future.
Keywords: Calcium deficient disease; Digital flame photometer; Fish bone; Multiparameter
photometer; Siganus lineatus
