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Condition index, meat yield, proximate and heavy metal composition in commercial bivalves
from Setiu Wetlands, Terengganu

1
¹Saiful Anuar, Ummi Nazatun Amira*, Ab Lah, Roslizawati
¹Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Nerus,
Terengganu, Malaysia.

* Corresponding author: amiras95@gmail.com

Abstract:

Condition index, meat yield, nutritional value and trace element of four commercial bivalves’ species;
oyster (Magallana bilineata), clams (Meretrix meretrix, Geloina expansa) and cockle (Anadara Cornea)
were investigated in December 2020 and March 2021 from Setiu Wetlands, Terengganu. Wet weight
condition index ranged between 17.44±7.60% and 29.17±5.82% in December and 20.35±5.62% and
36.08±5.53% in March for all species. Highest peak value of condition index was acquired in G. expansa
during March. In addition, the result revealed that meat yield for G. expansa (21.08±3.23%) was higher
in December as compared to other species and month. Condition index and meat yield were estimated
as indicators of the nutritional status of bivalves species. On the other hand, protein content reached the
highest peak in A. cornea (61.23±7.62%) while M. bilineata (16.87±1.90%) has the maximum value of
lipid in December. Having high quality protein content, making four bivalves species as excellent
alternative source of proteinaceous food. Metal concentrations in edible tissues of four species (B, Mn,
Fe, Zn, Cu, Ni, Co, Pb, Cr, Cd, Al, As, Hg) were below the safety limits proposed by the World Health
Organization and are safe for human consumption. However, monitoring the bivalves consumption still
important even though the current levels of bivalves are safe to be consume.

Keywords: Condition index, meat yield, nutritional value, heavy metal, bivalves.