Malaysian Journal of Analytical Sciences Vol 25 No 1 (2021): 53 - 61

 

 

 

 

DYNAMIC FATTY ACID PROFILES OF ASIAN SEA BASS (Lates calcarifer) FROM SETIU WETLANDS, EAST COAST PENINSULAR MALAYSIA

 

Profil Dinamik Asid Lemak Ikan Siakap Asia (Lates calcarifer) Dari Tanah Bencah Setiu, Pantai Timur Semenanjung Malaysia

 

Chan Yu Bin¹, Loh Saw Hong², Yusof Shuaib Ibrahim², Zainuddin Bachok³, Sabiqah Tuan Anuar²*

 

¹Department of Chemical Science, Faculty of Science,

Universiti Tunku Abdul Rahman, 31900 Kampar, Perak, Malaysia

²Faculty of Science and Marine Environment

³Marine Ecology Research Program, Institute of Oceanography and Environment

Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia

 

*Corresponding author:  sabiqahanuar@umt.edu.my

 

 

Received: 16 October 2020; Accepted: 4 December 2020; Published:  20 February 2021

 

 

Abstract

The oil lipids from the tissue and liver of locally grown Asian sea bass (Lates calcarifer) in an aquaculture of Setiu Wetlands, Terengganu, were extracted and analyzed for their fatty acid composition. The obtained fatty acid profiles revealed that both oils consisted of high amounts of saturated and monounsaturated fatty acids (SFA and MUFA, respectively) ranging within 35-54%, while polyunsaturated fatty acid (PUFA) were detected in lower proportions (10-15%). Among the fatty acids detected in the L. calcarifer tissue, C24:1 had the highest proportion (31.14%), followed by C16:0, C18:1n9 (trans), and C18:0. In contrast, C16:0 was the predominant fatty acid in the liver oil accounting for 33.88%, followed by C18:1n9 (cis), C24:1, and C18:0. The higher content of the extracted tissue and liver oils in MUFAs and SFAs was attributed to the salinity and temperature of the estuary water and the different dietary intake during the monsoon season. The fatty acid profiles were also compared with those obtained for L. calcarifer grown in other regions, indicating that the growing area of fish can affect the distribution of oil in the fish body as well as the lipid profiles within the same species.

 

Keywords: Asian sea bass, eicosapentaenoic acid, docosahexaenoic acid, liver, Setiu Wetlands, tissue

 

Abstrak

Minyak dari tisu dan hati ikan siakap Asia tempatan (Lates calcarifer) yang diternak dalam akuakultur di Tanah Bencah Setiu, Terengganu, telah diekstrak dan dianalisis untuk mengetahui komposisi asid lemak mereka. Profil asid lemak yang diperolehi mendedahkan bahawa kedua-dua minyak terdiri daripada jumlah asid lemak tepu dan mono tak tepu yang tinggi (SFAs dan MUFAs, masing-masing) antara 35-54%, manakala asid lemak poli tak tepu (PUFAs) dikesan dalam kadar yang lebih rendah (10-15%). Antara asid lemak yang dikesan dalam tisu L.calcarifer, C24:1 mempunyai bahagian tertinggi (31.14%), diikuti C16:0, C18:1n9 (trans), dan C18:0. Sebaliknya, C16:0 adalah asid lemak utama dalam minyak hati memberikan 33.88%, diikuti oleh C18:1n9 (cis), C24:1, dan C18:0. Kandungan tinggi MUFAs dan SFAs yang diekstrak dari minyak tisu dan minyak hati dalam adalah disebabkan oleh perbezaan saliniti dan suhu air muara serta tahap pengambilan pemakanan yang berbeza pada musim tengkujuh. Profil asid lemak juga dibandingkan dengan untuk L. calcarifer yang didapati di kawasan lain, menunjukkan bahawa kawasan penternakan ikan boleh memberi kesan terhadap kuantiti minyak di dalam badan ikan serta profil lipid dalam spesies yang sama.

 

Kata kunci:  ikan siakap, asid eikosapentaenoik, asid dokosaheksaenoik, hati, Tanah Bencah Setiu, tisu

 

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