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All Journal HAYATI Journal of Biosciences ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Journal of Marine Research Jurnal Kelautan Tropis JURNAL ENGGANO Journal of Fisheries & Marine
Rini Pramesti
Department Of Marine Sciences, Faculty Of Fisheries And Marine Sciences, Diponegoro University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Other

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Pertumbuhan Gracilaria sp. dengan Kepadatan Berbeda Pada Air Limbah Pemeliharaan Udang Intensif Ika Asri Desanti; Rini Pramesti; Sunaryo Sunaryo
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.35054

Abstract

Budidaya perairan yang saat ini dikembangkan dapat menghasilkan limbah dari sisa pakan yang digunakan. Masuknya limbah dari hasil budidaya dapat mempengaruhi kualitas perairan. Gracilaria sp. memiliki kemampuan untuk memanfaatkan sisa dari hasil pemeliharaan untuk pertumbuhannya. Penelitian ini bertujuan untuk mengetahui pengaruh kepadatan yang berbeda terhadap pertumbuhan Gracilaria sp. yang dipelihara pada media pemeliharaan. Penelitian ini dilaksanakan pada bulan Mei-Juni 2021 di Laboratorium Basah Gedung E Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Semarang. Penelitian dilakukan pada skala laboratorium dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari empat perlakuan dengan tiga ulangan. Perlakuan ini menggunakan berat Gracilaria sp. yang berbeda yaitu, perlakuan A (tanpa rumput laut/ kontrol), B (100 g), C (200 g), dan D (300 g). Parameter penelitian yang diamati adalah pertumbuhan rumput laut pada media pemeliharaan. Kualitas air pada media penelitian juga diamati dan diukur untuk pengetahui pengaruhkan terhadap pertumbuhan rumput laut.. Pertumbuhan Gracilaria menurun 0,6% untuk perlakuan B (100 g), 0,4% untuk perlakuan C (200 g) dan 1,7% untuk perlakuan D (300 g). Konsentrasi Nitrat tertinggi terjadi pada perlakuan D (300 g) dengan konsentrasi 9,0-9,2 mg/L dan konsentrasi terendah pada perlakuan A (0 g) 6,5-6,8 mg/L. Konsentrasi fosfat tertinggi pada perlakuan kontrol 2,8-3,0 mg/L dan konsentrasi Fosfat terendah pada perlakuan C (200 g) yang berkisar 1,90-2,00 mg/L. Hasil pengukuran kualitas air didapatkan suhu berkisar 27-28oC, salinitas 25-31 ppt, pH 6,9-7,1. Konsentrasi Nitrat dan Fosfat pada media pemeliharaan semakin meningkat dengan bertambahnya kepadatan rumput laut.   Aquaculture that is currently being developed can produce waste from the rest of the feed used. The entry of waste from aquaculture can affect water quality. Gracilaria sp. has the ability to utilize the rest of the results of maintenance for its growth. This study aims to determine the effect of different densities on the growth of Gracilaria sp. maintained on the maintenance medium. This research was carried out in May-June 2021 at the Wet Laboratory of Building E, Faculty of Fisheries and Marine Sciences, Diponegoro University, Semarang. The study was conducted on a laboratory scale using a completely randomized design (CRD) consisting of four treatments with three replications. This treatment uses the weight of Gracilaria sp. The different treatments were treatment A (without seaweed/control), B (100 g), C (200 g), and D (300 g). The research parameter observed was the growth of seaweed on the rearing media. Water quality in the research media was also observed and measured to determine its effect on seaweed growth. Gracilaria growth decreased 0.6% for treatment B (100 g), 0.4% for treatment C (200 g) and 1.7% for treatment D (300 g). The highest concentration of nitrate occurred in treatment D (300 g) with a concentration of 9.0-9.2 mg/L and the lowest concentration in treatment A (0 g) 6.5-6.8 mg/L. The highest phosphate concentration in the control treatment was 2.8-3.0 mg/L and the lowest phosphate concentration was in treatment C (200 g) which ranged from 1.90-2.00 mg/L. The results of water quality measurements obtained temperatures ranging from 27-28oC, salinity 25-31 ppt, pH 6.9-7.1. The concentration of nitrate and phosphate in the rearing media increased with increasing density of seaweed.
Perbedaan Pertumbuhan Rumput Laut Kappaphycus alvarezii Terhadap Jarak Tanam Muhamad Ihsan; Rini Pramesti; AB Susanto
Journal of Marine Research Vol 12, No 3 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i3.36431

Abstract

Rumput laut merupakan salah satu komoditas ekonomi yang menjadi unggulan Indonesia dan jenis yang banyak dibudidayakan adalah jenis Eucheuma cottonii (Kappaphycus alvarezii) dan Eucheuma spinosum. Usaha peningkatan produksinya dikembangkan melalui modifikasi metode budidaya untuk mencapai hasil produksi yang maksimal. Jarak tanam merupakan salah satu faktor yang berpengaruh terhadap pertumbuhan dan peningkatan produksi. Penelitian ini bertujuan menguji perbedaan jarak tanam terhadap laju pertumbuhan rumput laut K. alvarezii. Metode penelitian yang digunakan adalah metode kuantitatif dengan perlakuan berupa jarak tanam. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan 3 perlakuan jarak tanam (20 cm, 30 cm, 40 cm) dan masing-masing perlakuan dengan tiga ulangan. Parameter yang diamati yaitu laju pertumbuhan spesifik mingguan, laju pertumbuhan mutlak dan kelulushidupan K. alvarezii. Hasil penelitian menunjukkan jarak tanam yang berbeda berpengaruh terhadap pertumbuhan mutlak dan laju pertumbuhan spesifik serta terdapat perbedaan yang nyata dari tiap perlakuan dari waktu ke waktu. Hasil analisa statistik menunjukkan peningkatan pertumbuhan pada masing-masing perlakuan dari setiap waktu pengukuran. Jarak tanam yang memberikan hasil pertumbuhan terbaik pada jarak tanam 30 cm dengan hasil berat rata-rata 545,9 gr dan rata-rata laju pertumbuhan spesifik 3,84% per hari.  Seaweed is one of Indonesia’s leading economic commodities. The species that are widely cultivated in Indonesian waters are Eucheuma cottonii (Kappaphycus alvarezii) and Eucheuma spinosum. Efforts to increase production are developed through modification of cultivation methods to achieve maximum production results. Plant spacing is one the factors that affect growth and increased production in relation to nutrient absorption because the spacing will affect the movement of water carryiing nutrients. This study aims to examine differences in plant spacing on the optimal growth rate of K. alvarezii seaweed for the growth of K. alvarezii. The research method used is a quantitative method with treatment in the form of spacing. The experimental design used was a completely randomized design using 3 spacing treatments (20 cm, 30 cm, 40 cm) and 3 replications. Parameters observed were weekly specific growth rate, absolute growth rate and survival rate of K. alvarezii. The results showed that different plant spacing had an effect on absolute growth and specific growth rate and there were significant differences in each treatment from time to time. The results of statistical analysis showed an increase in growth in each treatment from each measurement time. The spacing that gave the best and optimal growth results was found in the 30 cm spacing treatment by producing an average weight gain of 545,9 g and an average specific growth rate of 3,84% per day.
Penyerapan Karbon Pada Vegetasi Lamun Di Pantai Legon Bajak Pulau Kemujan, Taman Nasional Karimunjawa Karla Lutfia Rahmadanti; Gunawan Widi Santosa; Rini Pramesti
Journal of Marine Research Vol 12, No 3 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i3.37564

Abstract

Gas karbondioksida yang tinggi di atmosfer dapat memicu pemanasan global. Upaya mitigasi diperlukan untuk mengurangi dampak buruk, salah satunya dengan pemanfaatan lamun sebagai penyerap karbon yang dikenal dengan  blue carbon. Penelitian ini bertujuan mengetahui estimasi biomassa dan kandungan karbon pada vegetasi lamun di Pantai Legon Bajak Pulau Kemujan, Taman Nasional Karimunjawa. Penelitian dilakukan pada 28 – 29 November 2021 dengan dua stasiun. Analisis vegetasi dilakukan menggunakan metode line transect quadrant, yang mengacu pada buku Panduan Monitoring Padang Lamun LIPI. Pengambilan sampel lamun menggunakan seagrass core. Biomassa lamun terbagi menjadi bagian atas substrat (daun) dan bawah substrat (akar dan rhizoma). Nilai biomassa lamun ditentukan melalui berat kering dari dengan cara pengeringan. Nilai kandungan karbon diperoleh melalui metode LOI (Loss of Ignition) atau pengabuan kering.Hasil penelitian diperoleh 5 jenis lamun, antara lain Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis dan Halodule uninervis. Kondisi padang lamun tergolong memiliki penutupan sedang. Nilai biomassa yang terdapat di bawah substrat (585 g/m2) lebih besar dibandingkan yang terdapat di atas substrat (346,73 g/m2), diikuti dengan kandungan karbon di bawah substrat (182,54 gC/m2)yang lebih besar dibandingkan atas substrat (119,43 gC/m2). Vegetasi lamun di lokasi penelitian berpotensi menyimpan karbon sebesar 301,97 gC/ m2. The high level of carbondioxide gas in the atmosphere can trigger global warming. Mitigation efforts are needed to reduce adverse impacts, such as by the optimization of seagrass as a carbon sink which is known as blue carbon. This study aims to determine the estimation of biomass and carbon content in seagrass vegetation at Legon Bajak Beach, Kemujan Island, Karimunjawa National Park. The research was conducted on 28 – 29 November 2021 at two stations. Vegetation analysis was conducted by using the line transect quadrant method, which refers to the LIPI Seagrass Monitoring Guidebook. Seagrass sample was collected by using seagrass core. Seagrass biomass is divided into above substrate (leaves) and below substrate (roots and rhizomes). The value of seagrass biomass was determined through dry weight by drying process in the oven. The value of carbon content in seagrasses is obtained through the LOI (Loss of Ignition) method or dry ignition.The results o the study obtained 5 species of seagrasses, including E. acoroides, T. hemprichii, C. rotundata, H. ovalis and H. uninervis. The condition of seagrass meadows is classified as having moderate cover. The value of the biomass below substrate (585 g/m2) is greater than the value of biomass above the substrate (346.73 g/m2), followed by the value of carbon content below the substrate (182.54 gC/m2) which is greater than above substrate (119.43 gC/m2). Seagrass vegetation in the study site has the potential to store 301.97 gC/m2 of carbon. 
Exploration of Antimicrobial Potency of Mangrove Symbiont Against Multi-Drug Resistant Bacteria Delianis Pringgenies; Wilis Ari Setyati; Ali Djunaedi; Rini Pramesti; Siti Rudiyanti; Dafit Ariyanto
Jurnal Ilmiah Perikanan dan Kelautan Vol. 13 No. 2 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v13i2.26199

Abstract

Highlight ResearchAntimicrobial potential against the test microbesRhizhopora mucronata isolate showed 95% homology with Bacillus subtilis, and 97% homology with Bacillus oceanisediminis,Acanthus ilicifolius isolate showed 96% homology with Paracoccus caeni, and 89% homology with Bacillus circulans. The study found 4 isolates with antimicrobial potency against MDR pathogenic microbes.The symbiont microbes taken from Rhizophora mucronata and Acanthus ilicifolius were determined to be of the genus Bacillus and Paracoccus AbstractAntimicrobial property of mangrove symbiont have the ability to fight Multi Drug Resistant bacteria which were Staphylococcus aureus, Escherichia coli, and Vibrio haryeyi. This study aimed to determine the potential of symbiont microbes from the root of Rhizopora mucronata and Acanthus iilicifolius as antimicrobial agents against multi-drug resistant (MDR) pathogenic microbes. This research was conducted during July to November 2020. The MDR bacteria were S. aureus, E. coli, and V. harveyi MDR test microbes. The symbiont microbes were identified through molecular analyses (PCR 16S rDNA). Isolation of symbiont microbes from R. mucronata resulted in 16 isolates, while isolation from A. iilicifolius resulted in 14 isolates. Based on the antimicrobial qualitative test against S. aureus, 8 out of 16 microbial isolates from R. mucronata were found to show antimicrobial properties. The testing of A. ilicifolius symbiont microbes against S. aureus showed 8 out of 14 isolates with antimicrobial properties. The test against E. coli resulted in 2 out of 16 microbial isolates from R. mucronata and 5 out of 14 isolates from A. ilicifolius with antimicrobial properties. The test against V. harveyi resulted in two out of 16 microbial isolates from R.mucronata and 4 out of 14 isolates from A. ilicifolius with antimicrobial properties. The quantitative test found 2 isolates from R. mucronta, namely isolates RM10 and RM12, with antimicrobial properties against MDR strain E. coli, with the best isolate being RM10, which produced 11.22 mm of inhibition zone diameter. Furthermore, the selection of isolates was based on the size of the inhibition zone, the clearness of the inhibition zone and the potential for antibacterial activity. Based on their overall antimicrobial potential against the test microbes, four isolates were selected.  Molecular analyses of RM12 isolate showed 95% homology with Bacillus subtilis, of RM 10 isolate showed 97% homology with Bacillus oceanisediminis, of AC isolate showed 96% homology with Paracoccus caeni, and of AC 5 isolate showed 89% homology with Bacillus circulans. The study found four isolates with antimicrobial potency against MDR pathogenic microbes. The symbiont microbes taken from R. mucronata and A. ilicifolius were determined to be of the genus Bacillus and Paracoccus. 
Pertumbuhan Rumput Laut Kappaphycus alvarezii (Doty, 1985) dengan Metode Lepas Dasar Prayudha, Muhammad Rifky; Pramesti, Rini; Susanto, AB
JURNAL ENGGANO Vol. 9 No. 2 (2024)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jenggano.9.2.208-215

Abstract

Environmental factors have affected seaweed cultivation. Productivity can be increased by using the right method. Seaweed production is related to brightness and photosynthetic processes which are affected by planting depth. This study aims to examine the effect of differences in depth on the growth rate of K. alvarezii with the off-bottom cultivation method in the waters of Lontar Village, Serang Regency, Banten Province. Randomized Block Design was used as the experimental design in this study. Cultivation depth of 30 cm, 50 cm and 70 cm were used as different treatments, each with three groups and 5 replications. The growth of sample weight was observed every week for six weeks as the main parameter. Water quality (temperature, salinity, brightness, pH, current velocity, nitrate, phosphate and dissolved oxygen) was observed as another parameter. The results showed that weight growth is influenced by the depth of cultivation. The 30 cm depth has the highest growth rate with an absolute growth of 890 grams and a specific growth rate of 2.85% per day.   Keywords : Kappaphycus alvarezii, depth, growth rate
Kitosan sebagai Bioadsorben Logam Besi (Fe) pada Jaringan Lunak Kerang Hijau (Perna viridis) Pramastuti, Fransisca Ria; Supriyantini, Endang; Pramesti, Rini; Sedjati, Sri; Ridlo, Ali
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.41095

Abstract

Logam besi (Fe) merupakan logam berat essensial yang dibutuhkan oleh makhluk hidup termasuk manusia dalam jumlah sedikit.  Jika jumlahnya melebihi batas ambang dapat menimbulkan efek racun karena bersifat karsinogenik. Salah satu upaya mengurangi kadar logam Fe pada daging kerang tersebut dapat dilakukan dengan memanfaatkan kitosan atau turunan kitosan yaitu karboksimetil kitosan (KMK) sebagai adsorben. Penelitian ini bertujuan mengetahui pengaruh variasi konsentrasi KMK dan kitosan terhadap kapasitas dan daya adsorpsi, serta konsentrasi terbaik dalam menurunkan kandungan logam berat Fe pada jaringan lunak kerang hijau. Metode penelitian secara eksperimental laboratoris. Rancangan penelitian menggunakan Rancangan Acak Lengkap (RAL) dengan 2 faktor. Faktor pertama yaitu sumber kitosan yang digunakan yaitu kitosan dan karboksimetil kitosan (KMK) dan faktor kedua yaitu variasi konsentrasi yaitu kontrol (0%); 0,5%; 1%; 1,5% dan masing-masing perlakuan dengan 3 ulangan. Konsentrasi logam berat Fe awal pada kerang hijau sebesar 13,17 mg/kg. Hasil penelitian menunjukkan adanya pengaruh variasi konsentrasi kitosan dan KMK terhadap kapasitas dan daya adsorpsi logam berat Fe pada jaringan lunak kerang hijau. Konsentrasi terbaik pada kitosan 1,5% dapat menurunkan logam berat Fe menjadi 2,43 mg/kg dengan kapasitas adsorpsi sebesar 0,72 mg/g dan daya serap 81,56%, sedangkan KMK 1,5% dapat menurunkan logam berat Fe menjadi 3,68 mg/kg dengan kapasitas adsorpsi 0,63 mg/g dan daya serap sebesar 72,04%.  Fe is an essential heavy metal needed by humans in small amounts, if the amount exceeds the threshold, it can cause toxic effects because it is carcinogenic. To reduce the metal content of Fe in mussel meat, it can be done by utilizing chitosan or chitosan derivatives, namely carboxymethyl chitosan (KMK) as an adsorbent. This study aims to determine the effect of variations in the concentration of KMK and chitosan on the adsorption capacity and power as well as the best concentration in reducing the heavy metal content of Fe in the soft tissue of green mussels. The research method is experimental laboratory. The research design used a completely randomized design (CRD) with 2 factors. The first factor is the source of chitosan used, namely chitosan and carboxymethyl chitosan (KMK) and the second factor is the variation in concentration used, namely control (0%), 0.5%, 1%, and 1.5% and each treatment 3 repetition. The initial heavy metal concentration of Fe in green mussels was 13.17 mg/kg. The results showed that there was an effect of variations in the concentration of chitosan and KMK on the capacity and adsorption ability of heavy metal Fe in green mussel meat. The best concentration of 1.5% chitosan can reduce heavy metal Fe to 2,43 mg/kg with adsorption capacity of 0.72 mg/g and absorption ability of 81.56%. Meanwhile, KMK 1.5% can reduce heavy metal Fe to 3.68 mg/kg with adsorption capacity of 0.63 mg/g and absorption ability of 72.04%. 
The Potential of Fucoxanthin from Sargassum polycystum: Antioxidant, Antibacterial, and Photoprotective Properties Pramesti, Rini; Setyati, Wilis Ari; Subagiyo; Anjani, Devi Oktavia
HAYATI Journal of Biosciences Vol. 33 No. 2 (2026): March 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.2.466-474

Abstract

Sargassum is a genus of seaweed that is known to contain fucoxanthin. The increasing incidence of health issues related to antimicrobial resistance (AMR), free radicals, and ultraviolet (UV) radiation has prompted the exploration of natural compounds as alternative sources of pharmaceutical agents. Fucoxanthin possesses the ability to protect cells from oxidative damage and offers a wide range of health benefits. This study aimed to evaluate the potential of fucoxanthin derived from Sargassum polycystum as an antioxidant, antifungal, antibacterial, and photoprotective (sunscreen) agent. The research methods included the extraction and isolation of fucoxanthin using Open Column Chromatography (OCC), phytochemical screening, thin-layer chromatography (TLC), antibacterial and antifungal assays, antioxidant activity assessment using the DPPH method, and determination of the Sun Protection Factor (SPF). The results showed that the extract of Sargassum polycystum contains secondary metabolites such as flavonoids, alkaloids, tannins, steroids, and saponins. The fucoxanthin fraction was successfully isolated, characterized by a distinct absorption peak at 447.5 nm and a retention factor (Rf) value of 0.93. The fucoxanthin fraction showed antibacterial activity against Staphylococcus aureus, as well as antifungal activity against Trichoderma sp. and Candida albicans. The antioxidant activity of the fucoxanthin fraction was categorized as strong, with an IC50 value of 67 ppm. Its photoprotective ability was classified as maximal, with a Sun Protection Factor value of 13.71. The fucoxanthin fraction derived from Sargassum polycystum exhibits promising potential as an antibacterial, antifungal, antioxidant, and photoprotective agent, and may serve as a valuable natural resource in pharmaceutical and cosmeceutical applications.
Seaweed Diversity and Bioactive Compounds in Panjang Islands, Central Java, Indonesia Setyati, Wilis Ari; Pramesti, Rini; Putri, Angela Salsalina; Risandhi, Danendra Aquila Azfa; Firdaus, Syifa Shafira; Lumban Gaol, Josua Gabriel
HAYATI Journal of Biosciences Vol. 33 No. 3 (2026): May 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.3.669-680

Abstract

The biodiversity of seaweed encompasses a wide array of potential bioactive compounds applicable to various industries, particularly pharmaceuticals. This study aimed to collect seaweed diversity data from Panjang Island, Jepara, Central Java, Indonesia, and to identify the bioactive compounds and biological activity of each seaweed species for preliminary screening. Random sampling was used to collect the sample. Qualitative identification of bioactive compounds was performed using the maceration method for extraction, phytochemical screening tests, and pigment identification based on Rf values on TLC. Antibacterial screening tests were performed against Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria, followed by testing against pathogenic fungi (C. albicans) using the disk diffusion method, and an antioxidant test using the DPPH method. The results showed that six species from three phyla (Chlorophyta, Phaeophyta, and Rhodophyta) exhibited distinct morphological characteristics, and the types of bioactive compounds produced by each species differed. The biological activity test results showed a low inhibitory activity. Antibacterial and antifungal biological activities were at the value of (<5 mm), and antioxidant biological activity was (>750 ppm). However, the active compounds and pigments with potential antibacterial, antifungal, and antioxidant properties can be optimized in various fields of bioindustry in the future.
Analisis Potensi Ekowisata Snorkeling di Pantai Timur Pangandaran, Jawa Barat Refa Nazalya Putri; Agus Trianto; Rini Pramesti
Journal of Marine Research Vol 15, No 1 (2026): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v15i1.49585

Abstract

 antai Timur Pangandaran merupakan kawasan yang memiliki ekosistem terumbu karang. Keanekaragaman terumbu karang berpotensi dibidang ekowisata bahari yaitu snorkeling. Kegiatan snorkeling belum dimanfaatkan secara optimal sehingga diperlukan penelitian. Kegiatan tersebut dapat dioptimalkan dengan melakukan analisis nilai kesesuaian wisata, daya dukung kawasan, dan upaya pengembangan ekowisata. Metode penelitian yaitu metode survei dan dilakukan di tiga stasiun berbeda. Hasil analisa dalam penelitian ini yaitu pada stasiun 1 tergolong ke dalam tingkat kesesuaian ”Sesuai Bersyarat”. Hal tersebut disebabkan oleh parameter kesesuaian wisata seperti persen tutupan karang, jenis life form, dan jenis ikan karang yang sedikit. Nilai indeks kesesuaian wisata pada stasiun 2 dan 3 tergolong dalam tingkat kesesuaian ”Cukup Sesuai”. Nilai daya dukung kawasan pada stasiun 1 yaitu 132 orang/hari, pada stasiun 2 yaitu 155 orang/hari, dan pada stasiun 3 yaitu 194 orang/hari. Hasil analisis SWOT didapatkan 5 strategi SO (Strengths – Opportunities) sebagai upaya pengembangan ekowisata snorkeling di Pantai Timur Pangandaran.  Pangandaran East Coast is an area that has a coral reef ecosystem. The diversity of coral reefs has potential in the field of marine ecotourism, namely snorkeling. Snorkeling activities have not been optimally utilized so research is needed. These activities can be optimized by analyzing the value of tourism suitability, carrying capacity of the area, and ecotourism development efforts. The research method is the survey method and is carried out at three different stations. The results of the analysis in this study are at station 1 classified into the level of suitability “Conditionally Suitable”. This is caused by tourism suitability parameters such as percent coral cover, types of life forms, and few reef fish species. The tourism suitability index value at stations 2 and 3 is classified as “Moderately Suitable”. The carrying capacity value of the area at station 1 is 132 people / day, at station 2 is 155 people / day, and at station 3 is 194 people / day. The results of the SWOT analysis obtained 5 SO (Strengths - Opportunities) strategies as an effort to develop snorkeling ecotourism on the East Coast of Pangandaran.
Pengaruh Perbedaan Suhu Pengeringan Terhadap Kualitas Kadar Air dan Kadar Abu Karagenan Rumput Laut Kappaphycus alvarezii Kristina Venza Panjaitan; Suryono Suryono; Rini Pramesti
Journal of Marine Research Vol 13, No 2 (2024): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v13i2.40257

Abstract

Kappaphycus alvarezii adalah jenis rumput laut dari divisi Rhodophyta penghasil kappa karaginan. Karaginan diperoleh dari metabolisme primer rumput laut K. alvarezii dan merupakan senyawa polisakarida yang mengandung sejumlah unit galaktosa. Karaginan adalah senyawa hidrokoloid yang memiliki senyawa polisakarida rantai panjang. Tujuan penelitian ini yaitu mengetahui kualitas kadar air dan kadar abu karaginan dari rumput laut K. alvarezii dengan perbedaan suhu pengeringan. Metode penelitian yang dipergunakan merupakan metode ekperimental laboratoris dan analisis data dengan Rancangan Acak Lengkap (RAL). Perlakuan pengeringan rumput laut K. alvarezii dilakukan menggunakan oven dengan suhu 600 C dan 700 C serta pengeringan sinar matahari sebagai perlakuan kontrol. Hasil penelitian menunjukkan kadar air karaginan yang diperoleh dari pengeringan dengan suhu 600 C yaitu 11,06% dan pengeringan dengan suhu 700 C yaitu 13,34%. Kadar abu yang diperoleh dari pengeringan dengan suhu 600 C yaitu 16,30% dan pengeringan dengan suhu 700 C yaitu 19%. Rendemen karaginan yang diperoleh dari perlakuan pengeringan dengan suhu 600 C yaitu 40,51% dan pengeringan dengan suhu 700 C yaitu 29,71%. Berdasarkan hasil analisis sidik ragam (Anova) diketahui bahwa tidak ada pengaruh perbedaan suhu terhadap kualiatas kadar air dan kadar abu karaginan K. alvarezii. Kappaphycus alvarezii is a type of seaweed from the Rhodophyta division that produces kappa carrageenan. Carrageenan is obtained from the primary metabolism of K. alvarezii seaweed and is a polysaccharide compound containing a number of galactose units. Carrageenan is a hydrocolloid compound that has a long chain polysaccharide compound. The purpose of this study was to determine the quality of water content and ash content of carrageenan from K. alvarezii seaweed with different drying temperatures. The research method used is a laboratory experimental method and data analysis with a completely randomized design (CRD). The treatment of drying K. alvarezii seaweed was carried out using an oven with a temperature of 600 C and 700 C and sun drying as a control treatment. The results showed that the moisture content of carrageenan obtained from drying at 600 C was 11.06% and drying at 700 C was 13.34%. The ash content obtained from 600 C drying was 16.30% and 700 C drying was 19%. The yield of carrageenan obtained from drying treatment with a temperature of 600 C is 40.51% and drying with a temperature of 700 C is 29.71%. Based on the results of analysis of variance (Anova), it is known that there is no effect of temperature differences on the quality of water content and ash content of K. alvarezii carrageenan. 
Co-Authors A. B. Susanto A.B. Susanto A.B. Susanto A.B. Susanto AB Susanto AB. Susanto Adam Sojuangon Pasaribu Adi Santoso Agus Indarjo Agus Sabdono Agus Trianto Ahmad Fadhil Muzaki Ahmad Saddam Habibi Aisya Tri Maharani Akbar, Muhamad Rahadian Akmal Nasrulloh Alfi Satriadi Ali Djunaedi Ali Ridlo Ananta, Raditya Rizki Andiska, Prismabella Wilis Anisah Harahap Anjani, Devi Oktavia Annisa Marhaeny Antonius Budi Susanto Ardiawan Pandu Romenda Ardiawan Pandu Romenda Aurellia Pandini Bambang Yulianto C. Wiencke Chara Julia Dara Chrisna Adhi Suryono Dafit Ariyanto Dara Ramadhania Istiqomahani David Jan Vito Dea Sekarwangi Putri Rinaryadi Delianis Pringgenies Desni Elfrida Samosir Dini, Puti Sukma Rahma Edi Wibowo Kushartono Ega Hagita Testi Eldita Amalia Elfonso Robby Sitorus Endang Supriyantini Errizal Machmud Putra Faishal Islami, Faishal Feri Setiawan Firdaus, Syifa Shafira G. O. Kirst Galih S. Adiguna Gandang Herdananto Nugroho Ghofari, Miftahul Akhyar Gunawan Widi Santosa Ihsan Mahfudh Ika Asri Desanti Intan Budi Setiasih Irwani Irwani Istiqomahani, Dara Ramadhania Ita Riniatsih Jelita Rahma Hidayati Karla Lutfia Rahmadanti Koesoemadji Koesoemadji Kristina Venza Panjaitan Lovensia Zukruff Albasit Lumban Gaol, Josua Gabriel Mahfudh, Ihsan Marhaeny, Annisa Maya Puspita Meli Ayu Pangestika Mhevy Nadya Pasaribu Miftahul Akhyar Ghofari Mohamad Mirza Mohamad Mirza Mohammad Aji Prakoso Niti Semito Muhamad Ihsan Muhamad Rahadian Akbar Muhammad Abdul Zaky Muhammad Rouf Indrawan Muhammad Zainuddin Muhammad Zainuddin Nasrulloh, Akmal Nirwani Nirwani Nirwani Soenardjo Nur Taufiq-Spj Nursiana Suci Wulandari Panjaitan, Kristina Venza Pasaribu, Adam Sojuangon Pramastuti, Fransisca Ria Prayudha, Muhammad Rifky Prismabella Wilis Andiska Puti Sukma Rahma Dini Putra, Errizal Machmud Putri, Angela Salsalina Raden Ario Radhian Wikanarto Widodo Raditya Rizki Ananta Refa Nazalya Putri Risandhi, Danendra Aquila Azfa Rozi Hamdani Rudhi Pribadi Salsabila Nur Nilamsari Satria Sakti Budi Leksono, Satria Sakti Budi Sebastian Margino Setia Devi Kurniasih, Setia Devi Setiasih, Intan Budi Siti Rudiyanti Sitorus, Elfonso Robby Speranda Speranda Sri Sedjati Stefanie Jessica Henny Larasati Subagiyo Subagiyo Subagiyo Subagiyo Subagiyo Sunaryo Sunaryo Suryono Suryono Susanto, AB. Tarida Tarida Tarida, Tarida Testi, Ega Hagita Titis Buana Tiurma S Tondo Tedjo Raharjo Triyanto Triyanto Wahid Agung Saputra Wahyu Bagio Leksono Wakhid Indra Kusuma Widodo, Radhian Wikanarto Wilis A Setyati Wilis Ari Setyati Wulandari, Nursiana Suci Yohanes Oktaviaris Yulandaris Marsa Zaky, Muhammad Abdul