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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Indonesian Journal of Halal Research
Hajisamae, Sukree
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Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Medicine & Pharmacology Other

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A New Record of Flathead Lobster Thenus indicus Leach, 1816 in Kota Kinabalu, Sabah (Malaysia) Based on Morphology and Genetic Identification, with Global Distribution Checklist: Thenus indicus in Sabah, Malaysia Radzi, Ihsan Hani; Chen, Cheng-Ann; Hajisamae, Sukree; Daning Tuzan, Audrey; Teng, Sing Tung
Journal of Tropical Life Science Vol. 15 No. 1 (2025)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/

Abstract

Members of the genus Thenus Leach 1816, commonly known as flathead lobsters, are significant contributors to global slipper lobster fisheries.  This study presents the first record of Thenus indicus Leach, 1816 (Crustacea: Decapoda: Scyllaridae) in Kota Kinabalu, Sabah, Malaysia, extending its known distribution to East Malaysia. Prior reports of T. indicus had only been confirmed in Peninsular Malaysia. Species identification was confirmed by mitochondrial DNA cytochrome c oxidase subunit 1 (CO1) sequencing, and morphological examination revealing a lack of spotting on the pereiopods, characteristic setaetion pattern of the second pereiopods, and prominent dentate features of the third maxillipeds. The third pereiopod merus length (ML3) was more than 0.45 times the carapace length (CL), which fulfilled one of the morphometric ratios for identification of this species. Intraspecific p-distances (0.0 – 2.51%, N=10) compared with GenBank reference sequences further validated this finding. A checklist and global map are included to illustrate updated T. indicus distributions. This report enhances the biodiversity and fisheries records of flathead lobsters within Southeast Asia, ensuring better resource management and conservation efforts.
Physicochemical Properties of Halal Alternative Gelatin from Parrotfish (Scarus quoyi) Scales Optimized by Response Surface Methodology Yulian, Muammar; Reza, Muhammad; Ramadani, Nofa; Hamama, Rosi; Fadhilah, Raudhatul; Akmal, Yusrizal; Abass, Kasim Sakran; Paujiah, Epa; Hajisamae, Sukree; Zulfahmi, Ilham
Indonesian Journal of Halal Research Vol. 7 No. 2 (2025): August
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ijhar.v7i2.38678

Abstract

The increasing demand for halal-friendly gelatin, combined with concerns over health risks associated with mammalian sources, has created a need for alternative raw materials. Fish scales from local species, such as parrotfish, offer a sustainable and promising option that has yet to be extensively explored. The study aims to investigate the physicochemical properties of gelatin extracted from the scales of the parrotfish (Scarus quoyi) scales. Response Surface Methodology (RSM) was employed to determine the optimal concentration of hydrochloric acid (HCl) and immersion time to maximize yield and quality. Physicochemical properties, including yield, moisture content, ash content, pH, and viscosity, were evaluated, and the structural characteristics of the gelatin were analyzed using Fourier-Transform Infrared Spectroscopy (FTIR). All processing steps were conducted in compliance with Halal Critical Control Points (HCCPs) to ensure the final product remained free from cross-contamination with non-halal substances. Response surface methodology optimization identified 4% HCl concentration and 29.4 hours of immersion as optimal conditions. These conditions produce gelatin with a yield, moisture, ash, pH, and viscosity are 14.5%, 4%, 0.48%, 4.15, and 1.78 cP, respectively. FTIR analysis confirmed that the extracted gelatin exhibited absorption peaks consistent with those of commercial gelatin, indicating a functional group similarity. Compared to gelatin from other fish species, parrotfish gelatin demonstrated a competitive yield and notably low moisture content, thereby enhancing its stability and storage potential. These findings highlight the potential of parrotfish scales as a sustainable source of halal gelatin, contributing to waste reduction and offering a viable alternative to mammalian gelatin.
Co-Authors Abass, Kasim Sakran Chen, Cheng-Ann Daning Tuzan, Audrey Epa Paujiah, Epa Fadhilah, Raudhatul Hamama, Rosi Ilham Zulfahmi Muammar Yulian Muhammad Reza Radzi, Ihsan Hani Ramadani, Nofa Teng, Sing Tung Yusrizal Akmal