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All Journal Biotropika Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Jurnal Pengabdian Magister Pendidikan IPA Journal of Aquaculture and Fish Health Jurnal Abdi Insani Jurnal Pijar MIPA Samota Journal of Biological Sciences (SJBIOS)
Prasedya, Eka Sunarwidhi
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Sosialisasi dan Pelatihan Transplantasi Karang di Kawasan Pesisir Kuta Mandalika Kabupaten Lombok Tengah Candri, Dining Aidil; Prasedya, Eka Sunarwidhi; Ahyadi, Himan; Farista, Baiq
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 3 (2024): Juli - September
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i3.5797

Abstract

Terumbu karang ekosistem yang memiliki peranan ekologi & manfaat ekonomi yang cukup besar bagi pulau Lombok yang menjadi daerah destinasi wisata bahari internasional dan lumbung perikanan nasional. Disisi lain kualitas ekosistem tersebut terus mengalami penurunan. Seperti yang terjadi di pesisir Kab. Lombok Tengah, termasuk kawasan Kuta mandalika. Oleh karena itu diperlukan kesadaran dan partisipasi semua pihak untuk menjaga dan merehabilitasi ekosistem tersebut, termasuk Universitas Mataram sebagai lembaga keilmuan untuk memberikan sumbangsih pemikiran dan percontohan. Salah satu tehnik rehabilitasi yang mudah, murah dan efektif adalah transplantasi karang. Tujuan kegiatan ini adalah untuk membuat demplot percontohan upaya rehabilitasi terumbu karang dengan teknik transplantasi karang. Kegiatan ini akan dilaksanakan dengan pendekatan partisipatif selama 3 bulan tahun 2023 di kawasan pesisir Kuta Mandalika, Kabupaten Lombok Tengah. Tahapan pelaksanaan kegiatan meliputi survei lokasi, koordinasi dengan stakholder lokal, pembuatan media transplantasi, penempatan media di lokasi rehabilitasi, pencarian induk karang dan pengambilan transplant karang, dan pemasangan transplant pada media transplantasi, pemasangan tanda lokasi transplantasi karang. Kegiatan ini diharapkan menjadi contoh dan motivasi bagi semua pihak untuk menjaga dan merehabilitasi terumbu karang.
Isolation and Analysis of Microplastics in Feather Clams (Anadara antiquata) at Tanjung Luar Fish Landing Base, East Lombok Regency Aulia, Nurul Waroatul; Prasedya, Eka Sunarwidhi; Candri, Dining Aidil
Jurnal Pijar Mipa Vol. 20 No. 2 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i2.7705

Abstract

Microplastics are small particles <5 mm produced from plastic waste. The plastic waste thrown in the sea, As a result, microplastics have increased and are widespread almost throughout the sea surface, including Tanjung Luar Fish Landing and East Lombok Regency. Microplastics are very dangerous for human health due to microplastic contamination in feather clams, which are often consumed by the local community.  Microplastics in the shellfish body can accumulate from the food chain and enter the digestive system. This study aims to determine the presence and characteristics of microplastics in feather clams (Anadara antiquata) at Tanjung Luar Fish Landing, East Lombok Regency. The research method used was descriptive quantitative. Samples of feather clams obtained from Tanjung Luar Fish Landing were separated from their shells. The clam meat was added with 10% KOH to destroy organic matter. The sample was incubated in a water bath until it was homogeneous. The sample was filtered using a 250 µm sieve. The filter results were dried with a dryer at 40˚C. Samples were identified with a microscope. The results showed microplastic contamination in feather clams from Tanjung Luar Fish Landing. Microplastic particles found were 59 particles with fibre types, as many as 47 particles, films 9 particles, and fragments 3 particles; there were 4 types of colours: black, clear, red and green. The dominant microplastics found were of the fibre type. Feather clams contaminated with microplastics harm human health, including metabolic disorders.
Isolation and Analysis of Microplastics in Vaname Shrimp (Litopenaeus vannamei Boone, 1931) at Tanjung Luar Fish Landing Base, East Lombok Regency Adawiyah, Rabiatul; Prasedya, Eka Sunarwidhi; Candri, Dining Aidil
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): Oktober - Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i4.7567

Abstract

Microplastics are plastic debris resulting from the fragmentation process that has a size less than <5 mm. Microplastic contamination in marine waters can have a direct impact on the ecosystem and digestive system of aquatic biota, and is dangerous for humans if consumed because it is toxic. This study aims to determine the abundance and characteristics of microplastics in Vaname shrimp (Boone, 1931) collected by Tanjung Luar Fish Landing Base (PPI), East Lombok Regency, Indonesia. Vaname shrimp samples were taken using the Random Sampling method obtained from fishermen at the Tanjung Luar Fish Landing Base, analyzing the abundance and characteristics of microplastics with 10% KOH. The results showed that the abundance of microplastics obtained was 37 particles with the most accumulated type of microplastics, namely the fiber form of 22 particles/gram with the most dominant color, namely black as much as 57%.  There are 3 forms of microplastics found in vaname shrimp meat (Littopenaeus vannamei), namely fiber 22 particles, fragments 11 particles and filaments 4 particles. Black color as much as 57%, followed by clear color as much as 27%, yellow as much as 11%, and blue as much as 5%.
Effect of Phosphorus Concentration on Sea Grape Growth Rate (Caulerpa racemosa) Amrina Rossada, Rizky; Cokrowati, Nunik; Prasedya, Eka Sunarwidhi
Journal of Aquaculture and Fish Health Vol. 14 No. 3 (2025): JAFH Vol. 14 No. 3 September 2025
Publisher : Department of Aquaculture

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jafh.v14i3.70858

Abstract

Sea grapes are one type of seaweed in Indonesia. One of them is Caulerpa racemosa. This study was conducted to determine the effect of phosphorus concentration on the growth rate of C. racemosa with different doses of fertilizer. This study was designed using a completely randomized design (CRD) consisting of four treatments and three replicates. The dose used is 0 ppm (control), 1.5 ppm, 3 ppm, and 4.5 ppm. C. racemosa were reared for 15 days in 35 cm plastic containers with a volume of water used during the rearing period of 10 liters, equipped with aerators and small aeration bubbles set with a stocking density of 25 grams. The results showed that the daily growth rate (DGR) of sea grapes ranged from 5.6-17.55%, final weight ranged from 10-31.3 g, antioxidant activity ranged from 30.49-38.66%, and chlorophyll content ranged from 26.21-31.35 mg/L. The DGR of C. racemosa was not substantially affected (p>0.05) by the fertilizer formulation dose concentrations. Further research needs to be done by adding phosphorus fertilizer doses for standard daily growth rate results.
Morphological and Molecular Identification Using the Cox1 Gene in Wild Populations of Gracilaria sp. from Ekas Hamlet Salman Alrasyid, Salman Alrasyid; Haqiqi, Nirwana; Ghazali, Mursal; Julisaniah, Nur Indah; Setyaningrum, Tri Wahyu; Prasedya, Eka Sunarwidhi
Samota Journal of Biological Sciences Vol 4 No 1 (2025): Samota Journal of Biological Sciences
Publisher : University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/sjbios.v4i1.6809

Abstract

Ekas yang terletak di Kabupaten Lombok Timur merupakan sentra budidaya rumput laut. Salah satu rumput laut yang terdapat di perairan Ekas adalah genus Gracilaria . Rumput laut merupakan organisme dengan plastisitas fenotipe yang tinggi sehingga karakter morfologinya mudah berubah. Selain identifikasi morfologi, identifikasi molekuler juga dilakukan sebagai alternatif yang lebih akurat. Cox1 merupakan salah satu gen pada DNA mitokondria yang digunakan dalam penentuan genetika organisme, khususnya genetika rumput laut. Penelitian ini bertujuan untuk mengetahui hasil identifikasi Gracilaria sp. secara morfologi dan molekuler. Identifikasi morfologi mengacu pada buku identifikasi, AlgaeBase, dan jurnal terkait. Analisis data menggunakan program ChromasPro dan BioEdit. Hasil data fasta di-blast pada web NCBI untuk menentukan spesiesnya. Hasil fasta juga digunakan dalam analisis filogeni untuk mengetahui informasi kekerabatan sampel penelitian dengan sampel data di NCBI. Pada penelitian ini diperoleh 1 sampel penelitian pada 1 titik sampling. Hasil identifikasi morfologi diidentifikasi sebagai Gracilaria edulis dan hasil identifikasi molekuler dengan serangkaian analisis bioinformatika juga dikonfirmasi sebagai Gracilaria edulis . Gracilaria EKS_035 memiliki kekerabatan terdekat dengan G. edulis KY995636.1 Filipina, H. edulis JQ026083.1 Malaysia dan G. edulis KY995635.1 Filipina.
Isolation and Analysis of Microplastics in Ikan Tongkol Euthynnus affinis Cantor, 1849 at Tanjung Luar Fish Landing Base, East Lombok Syahadatina, Rifqah Hashifah; Prasedya, Eka Sunarwidhi; Candri, Dining Aidil
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): Oktober - Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i4.7566

Abstract

The increasing amount of plastic consumption in Indonesia has an impact on the accumulation of plastic waste on land as well as water, with the nature of plastic that is difficult to decompose by microorganisms causing many organisms to be polluted by the waste. Therefore, research on microplastic content needs to be done to determine the safety of fish which is the food of the community. This study was conducted to find out how the abundance of microplastics as well as the characteristics of microplastics contained in Ikan Tongkol  (Euthynnus affinis) at PPI Tanjung Luar, through an isolation process using a 10% KOH solution added to fish meat, then incubated until both were homogeneous in a water bath at 70°C, 150 rpm. Furthermore, the homogenized sample was filtered using a 250 µm graded sieve. After filtering the sample will be put into a dryer at 40°C for 2 hours before being observed under a microscope. The results of this study indicate that microplastics have accumulated in fish with an abundance of 8.6 MP/Ind with the type of microplastics that most accumulates in the meat of Tuna (Euthynnus affinis) is fiber type microplastics as much as 81% of the total sample and the most dominant color is black. There are 4 microplastics found accumulated in the meat of Euthinnus affinis, namely 81% fiber, 11% fragments, 6% film, and 2% granules.
The Effect of Different Solvents and Methods on Brown Seaweed Turbinaria sp. Metabolite Profil Handayani, Ervina; Frediansyah, Andri; Prasedya, Eka Sunarwidhi; Sunarwidhi, Anggit Listyacahyani
Jurnal Biologi Tropis Vol. 24 No. 2b (2024): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i2b.7833

Abstract

Turbinaria sp. is valuable source of various metabolites that exhibit pharmacological and biological activities. The diversity of these metabolites can be influenced by several factors, such as environmental conditions and the choice of solvent during the extraction process. This study aims to investigate the effect of different solvents and methods on the metabolite profiles of Turbinaria sp. extract Turbinaria sp. was extracted using maceration and soxhlet method with n-hexane and n-hexane:methanol as solvents. Phytochemical analysis was performed using tube tests. Meanwhile the determination of total phenols and total flavonoids was performed by spectrophotometry assay. The results has shown that Turbinaria sp. contain flavonoids, alkaloids, terpenoids, phenols, and tannins, with the highest total phenol and total flavonoid content found in the extracts using n-hexane as a solvent and soxhletation methods.
Comparison of Anti-Bacterial Activity of Methanol Extract and Non-Polar Fraction of Macroalgae Sargassum sp. Wibowo, Adi Tri; Widyastuti, Sri; Prasedya, Eka Sunarwidhi; Mukhlishah, Neneng Rachmalia Izzatul; Pangestu, Kukuh Waseso Jati; Sunarwidhi, Anggit Listyacahyani
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4.10522

Abstract

Sargassum sp. is an abundant source of bioactive non-polar compounds, however their anti-bacterial potential remains understudied. This study aimed to compare the anti-bacterial activity between the methanol extract and non-polar fraction of Sargassum sp. Extraction was performed using sonication with methanol, followed by partition with petroleum ether and fractionation on silica gel G60 using n-hexane:ethyl acetate (9:1). FTIR analysis characterized the functional groups, while anti-bacterial evaluation was performed using the disc diffusion method against Staphylococcus aureus. Data were analyzed statistically using one-way ANOVA. FTIR spectrum of the methanol extract showed absorption bands corresponding to non-polar compounds. In the non-polar fraction, the bands were more dominant, suggesting a higher content of non-polar compounds. Anti-bacterial evaluation of Sargassum sp., methanol extract and non-polar fraction exhibited inhibitory effects against S. aureus. The non-polar fraction produced a larger inhibition zone compared to the methanol extract, indicating stronger anti-bacterial activity and significant difference between the two samples (p<0.05). The results of this study showed that the non-polar fraction of Sargassum sp. methanol extract has higher anti-bacterial activity compared to the extract. Further studies are recommended to elucidate the individual bioactive compounds and identify their anti-bacterial mechanisms.
Sosialisasi Pengaplikasian Pupuk Organik Rumput Laut pada Skala Lapang untuk Mendukung terwujudnya Green Agriculture Prasedya, Eka Sunarwidhi; Ilhami, Bq Tri Khairina; Kurniawan, Nanda Sofian Hadi; Hernawan, Ari; Widyastuti, Sri; Jupri, Ahmad
Jurnal Pengabdian Magister Pendidikan IPA Vol 6 No 4 (2023): Oktober-Desember 2023
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v6i4.5232

Abstract

Swasembada Pangan merupakan program pemerintah pusat yang diharapkan mampu mewujudkan ketahanan dan kemandirian pangan nasional. Untuk mencapai hal tersebut perlu didukung dengan kesiapan dan kemandirian petani selaku pelaku utama tanaman pangan. Namun, kemandirian sektor pertanian masih memiliki beberapa permasalahan terkait sarana produksi seperti kelangkaan pupuk, tidak terkecuali petani padi yang ada di Nusa Tenggara Barat (NTB). Oleh karena itu, diperlukan alternatif pupuk substitusi yang dapat mengurangi penggunaan pupuk kimia dan berkontribusi dalam mencapai pertanian berkelanjutan. Nusa Tenggara Barat merupakan salah satu daerah yang melimpah ditumbuhi berbagai jenis rumput laut. Rumput laut coklat Sargassum sp. merupakan salah satu jenis rumput laut yang banyak ditemukan dan tumbuh di perairan NTB, namun belum dimanfaatkan dengan baik oleh masyarakat. Padahal Sargassum sp. mengandung berbagai senyawa bioaktif termasuk Zat Pengatur Tumbuh (ZPT) yang berpotensi untuk dijadikan sebagai pupuk organik. Program ini dilakukan dalam bentuk sosialisasi dan demonstrasi serta pembimbingan proses aplikasi Pupuk Organik Rumput Laut (PORL). Materi sosialisasi disampaikan oleh Eka Sunarwidhi Prasedya, M.Sc., Ph.D., selaku perwakilan Pusat Unggulan IPTEK Biosains dan Bioteknologi Universitas Mataram dan Bq Tri Khairina Ilhami, S.Si., M.Si. selaku perwakilan CV. Organik Medika Biotek yang menjadi mitra dalam kegiatan ini. Materi sosialisasi yang disampaikan meliputi substansi berikut: (1) Pemanfaatan rumput laut sebagai bahan dasar pupuk organik; (2) Dampak penggunaan pupuk kimia berlebih; (3) Hubungan antara lingkungan yang berkelanjutan dan kesehatan; (4) Tahapan pembuatan PORL sederhana berbahan dasar rumput laut
EDUKASI RESIKO PENGGUNAAN PUPUK CAIR PADA EKOSISTEM BUDIDAYA RUMPUT LAUT DI DESA KOJA DOI, SIKKA, MAUMERE Qoriasmadillah, Wanda; Ilhami, Baiq Tri Khairina; Haqiqi, Nirwana; Prasedya, Eka Sunarwidhi; Widyastuti, Sri
Jurnal Abdi Insani Vol 11 No 2 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i2.1371

Abstract

Seaweed cultivation is one of the superior aquatic commodities in East Nusa Tenggara (NTT) Province. In Sikka Regency, the majority of coastal communities work as seaweed cultivators. There are several efforts made by the community to increase seaweed production, one of which is by using Green Tonik (GT) liquid fertilizer. However, the use of GT fertilizer can cause macronutrient accumulation in the sea. This accumulation causes the bloom of unwanted microorganisms, thus damaging the stability of the marine ecosystem. The aim of this service activity is to hope that the people of Koja Doi, Sikka Regency, Maumere understand the impacts and risks of using GT liquid fertilizer so that it is not reused in seaweed cultivation or other cultivation in the future. The method used in this service is direct education and outreach by visiting the homes of several seaweed farmers who are affected by the use of GT liquid fertilizer. Apart from that, a discussion session was held between the service team and the community as a step to exchange information. The result of this activity was that information was obtained that the use of GT liquid fertilizer was initiated by the community based on the use of GT fertilizer on land which was able to increase crop production. As a result of the use of this fertilizer, no cultivated seaweed can live in these waters. Scientific research has not been carried out regarding the levels of macronutrient content found in Koja Doi waters so the current consequences are only based on assumptions from the community. Through this research, the community understands the impacts and risks of using GT liquid fertilizer so that people will not use the same or different liquid fertilizer in seaweed cultivation in the future.
Co-Authors Ahmad Jupri Ahyadi, Himan Amrina Rossada, Rizky Andri Frediansyah, Andri Ari Hernawan Arrazy, Mu'adz Arrazy, Muadz Aulia, Nurul Waroatul Dewi, Novia Devi Kusuma Dining Aidil Candri, Dining Aidil ERNIN HIDAYATI Ervina Handayani Farista, Baiq Fitriani Fitriani Haqiqi, Nirwana Hazama, Akihiro Hikmaturrohmi Hikmaturrohmi, Hikmaturrohmi Ichfa, Muh Syach Maulad Ichfa, Muhammad Syach Maulad Ikunaga, Arisa Ilhami, Baiq Tri Khairina Ilhami, Bq Tri Khairina Iman, Zuhratul Julisaniah, Nur Indah Kurniawan, Nanda Sofian Hadi Maulana, Farreh Alan Miyake, Masao Mukhlishah, Neneng Rachmalia Izzatul Nunik Cokrowati Nurhidayati, Siti Zainiah Pangestu, Kukuh Waseso Jati Qoriasmadillah, Wanda Rabiatul Adawiyah Ramadhan, Moch. Fitrah Salman Alrasyid, Salman Alrasyid Saraswati, Putu Bella Aprillia Shinozuka, Miho Sri Widyastuti Sunarwidhi, Anggit Listyacahyani Suryadi, Bambang Fajar Syahadatina, Rifqah Hashifah Tate, Kazuma Tri Wahyu Setyaningrum, Tri Wahyu Utami, Ni Wayan Putri Wibowo, Adi Tri