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INDONESIA
JURNAL ILMIAH PLATAX
Published by Universitas Sam Ratulangi
ISSN : 23023589     EISSN : -     DOI : -
Core Subject : Social,
Environmental Science
Mencakup Penulisan yang berhubungan dengan pelaksanaan penelitian yang dilakukan secara mandiri, atau kelompok, dan berdasarkan Ruang Lingkup Pengelolaan Wilayah Pesisir, Konservasi, Ekowisata, dan Keanekaragaman Hayati Perairan.
Arjuna Subject : -
Articles 488 Documents
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Status of Seagrass Beds in the Waters around Bahowo, Tongkaina Village, Manado City North Sulawesi Province Togolo, Festy; Menajang, Febry S. I; Manginsela, Fransine B; Kondoy, Khristin I. F; Lasabuda, Ridwan; Schaduw, Joshian N
Jurnal Ilmiah Platax Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i1.41816

Abstract

This research was conducted in November 2021 in the waters around Bahowo, Tongkaina Village, Manado City, North Sulawesi Province. Seagrass sampling was carried out using a random sampling method (randomly) with a quadratic transect drawn perpendicular to the shoreline. Thus, 6 species of seagrass were obtained, namely Enhalus acoroides, Halophila ovalis, Thalassodendron ciliatum, Thalassia hemprichii, Syringodium isoetifolium and Halodule pinifolia, with various aquatic environmental conditions. The results of the analysis of the status of the seagrass beds obtained that the seagrass cover value was 50.20% which was included in the "moderate" category, while the seagrass cover per species was Thalassia hemprichii species with the highest cover found was 30.08%, Enhalus acoroides was 21.49% , Halophila ovalis was 6.84%, Thalassodendron ciliatum was 17.39%, Syringodium isoetifolium was 12.31% and Halodule pinifolia was the least common type was 2.35%. The density value of Enhalus acoroides seagrass is 48.375 ind/m2, Halophila ovalis is 14.5 ind/m2, Thalassodendron ciliatum is 35,475 ind/m2, Thalassia hemprichii species with the highest density is 67.25 ind/m2, Syringodium isoetifolium is 27.875 ind/m2 and Halodule pinifolia species density is at least 5.25 ind/m2. The status of the seagrass beds was categorized as "unhealthy" with an average seagrass cover value of 50.20%.Keywords: Seagrass Status, Cover, Seagrass, Bahowo ABSTRAKPenelitian ini dilaksanakan pada bulan November 2021 di Perairan Sekitar Bahowo, Kelurahan Tongkaina, Kota Manado, Provinsi Sulawesi Utara. Pengambilan sampel lamun dilakukan menggunakan metode random sampling (secara acak) dengan transek kuadrat yang ditarik tegak lurus garis pantai. sehingga diperoleh 6 jenis lamun yaitu Enhalus acoroides, Halophila ovalis, Thalassodendron ciliatum, Thalassia hemprichii, Syringodium isoetifolium dan Halodule pinifolia, dengan kondisi lingkungan perairan yang beragam. Hasil dari analisis status padang lamun diperoleh nilai tutupan lamun adalah 50,20% termasuk ke dalam kategori “sedang”, sedangkan tutupan lamun per jenis yaitu Thalassia hemprichii jenis dengan tutupan yang tertinggi dijumpai adalah 30,08%, Enhalus acoroides adalah 21,49%, Halophila ovalis adalah 6,84%, Thalassodendron ciliatum adalah 17,39%, Syringodium isoetifolium adalah 12,31% dan Halodule pinifolia jenis yang paling sedikit ditemukan adalah 2,35%. Nilai kerapatan lamun Enhalus acoroides adalah 48,375 ind/m2, Halophila ovalis adalah 14,5 ind/m2, Thalassodendron ciliatum adalah 35,475 ind/m2, Thalassia hemprichii jenis kerapatannya paling tinggi adalah 67,25 ind/m2, Syringodium isoetifolium adalah 27,875 ind/m2 dan Halodule pinifolia jenis kerapatannya paling sedikit adalah 5,25 ind/m2. Status padang lamun dikategorikan dalam kondisi “kurang sehat” dengan nilai rata-rata penutupan lamun adalah 50,20%.  Kata kunci: Status Padang Lamun, Tutupan, Lamun, Bahowo
Determination of Potential Pelagic Fishing Ground Based on Chlorophyll a Using Aqua Modis Satellite Sitorus, Hotma Stefany; Manu, Lusia; Kaparang, Frangky E; Dien, Heffry V
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.41888

Abstract

The purpose of this study was to determine the potential pelagic fishing ground using Aqua Modis satellite imagery in WPP 716. Catch data and coordinates of fishing ground from September to November 2021 were taken from the Tumumpa Fisheries Port, Manado. Chlorophyll-a data and Sea Surface Temperature data were downloaded from the website of http://oceancolorgsfc.nasa.gov. The results showed that the distribution of chlorophyll-a was concentrated at 02011'982" N and 1240 57'913" E with a total catch of 5,050 kg. The results indicated that the higher chlorophyll-a concentration and the increase of sea surface temperature in the fishing ground the more catch produced.Keywords: pelagic fish, Aqua Modis, WPP 716, chlorophyll-a, sea surfaceAbstractTujuan dari penelitian ini adalah untuk menentukan daerah penangkapan ikan pelagis yang potensial dengan menggunakan citra satelit Aqua modis di WPP 716.  Data hasil tangkapan dan koordinat daerah penangkapan ikan pada September sampai November 2021 diambil dari   pelabuhan Perikanan Pantai Tumumpa, Manado. Data klorofil-a dan data Suhu Permukaan Laut diunduh dari situs http://oceancolorgsfc.nasa.gov. Hasil penelitian menunjukan sebaran klorofil-a terkosentrasi di 02011’982” LS dan 1240 57’913” BT dengan jumlah hasil tangkapan sebanyak 5.050 kg. Hasil analisis menunjukan semakin tinggi konsentrasi klorofil-a dan suhu permukaan laut pada daerah penangkapan ikan maka semakin meningkat jumlah hasil tangkapan yang dihasilkan.Kata kunci: pelagis, Aqua Modis, WPP 716, klorofil-a, suhu permukaan laut
Fishing Season Estimation of Mackerel Scad (Decapterus spp) with purse seines in the Sulawes Sea based on catch data Ginting, Jebry Yanta; Pamikiran, Revols D. Ch.; Masengi, Kawilarag W. A; Luasunaung, Alfret; Dien, Heffry V.; Manu, Lusia
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.41897

Abstract

This study aims to determine the pattern or fluctuations in the fishing season of mackerel scad (Decapterus spp) and suspected months of the fishing season. Data analysis is made in the form of cross-tabulation and mapped into graphs. Fishing season is determined by the average percentage methods based on time series analysis. The results indicated that the fishing season of mackerel scad in the Sulawesi Sea fluctuates. The fishing season occurs from May to November with the highest season/seasonal index occurring in July, while non-seasonal conditions occur from December to April with the smallest seasonal index/non-seasonal peak occurring in January.Keywords:  mackerel scads, fishing season, fluctuation, Sulawesi SeaAbstrakPenelitian ini bertujuan untuk mengetahui mengetahui pola atau bentuk fluktuasi musim  penangkapan  dan pada bulan apa saja diduga menjadi kondisi musim penangkapan ikan layang (Decapterus spp). Penyajian dan analisis data dibuat dalam bentuk tabulasi silang dan dipetakan dalam bentuk grafik. Untuk analisis musim penangkapan ikan menggunakan Metode Presentasi Rata-rata (The Average Percentage Methodes) yang didasarkan pada Analisis Runtun Waktu (Time Series Analysis). Hasil analisis menunjukan bahwa musim penangkapan ikan layang (Decapterus spp) di Laut Sulawesi berfluktuasi. Musim penangkapan terjadi pada Mei sampai November dengan puncak musim/indeks musim tertinggi terjadi pada Juli sedangkan kondisi bukan musim terjadi pada Desember sampai April dengan indeks musim terkecil/puncak bukan musim terjadi pada Januari. Kata-kata Kunci: ikan layang, musim penangkapan, fluktuasi, laut Sulawesi.
Application of chlorophyll in carrageenan from algae Kappaphycus alvarezii (Doty) Doty 1996 Kurniawan, Budi; Mantiri, Desy M. H.; Kemer, Kurniati; Rompas, Rizald M.; Kawung, Nickson J.; Mudeng, Joppy D.
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.41935

Abstract

The aim of this study is to determine the effect of NaOH and KOH on carrageenan. The addition of natural dyes was carried out with different concentrations of carrageenan and the value of viscosity and gel strength of the algae Kappaphycus alvarezii to a mixture of natural dyes. The samples of algae were taken from the cultivation area in Belang waters, Southeast Minahasa Regency. The results of this study on the addition of natural dyes in refined carrageenan have succeeded in giving a green color and did not affect the viscosity and gel strength of the carrageenan gel when compared to the control (without treatment). The viscosity value of carrageenan with 4% NaOH concentration was 53.34-53.69 cP and KOH concentration was 49.55-50.03 cP. The gel strength value at 4% NaOH concentration was 74.11-74.89 mm/g/sec, while at 5% KOH concentration it was 84.22-84.89 mm/g/sec. The viscosity and gel strength still meet standards set by the Food Agriculture Organization (FAO).Keywords: Carrageenan, natural dye, Kappaphycus alvarezii, viscosity, gel strengthAbstrakPenelitian ini bertujuan untuk mengetahui pengaruh NaOH dan KOH terhadap karagenan. Pada penelitian ini dilakukan penambahan pewarna alami dengan konsentrasi yang berbeda terhadap refined carrageenan dan nilai viskositas serta kekuatan gel karagenan dari alga Kappaphycus alvarezii terhadap campuran pewarna alami. Sampel alga diambil dari area budidaya di Perairan Belang, Kabupaten Minahasa Tenggara. Hasil penelitian tentang penambahan pewarna alami pada refined carrrageenan telah berhasil memberikan warna hijau dan tidak mempengaruhi viskositas serta kekuatan gel karagenan jika dibandingkan dengan kontrol (tanpa perlakuan). Nilai viskositas karagenan dengan konsentrasi NaOH 4% adalah 53,34 – 53,69 cP dan konsentrasi KOH 5% sebesar 49,55 – 50,03 cP. Nilai kekuatan gel pada konsentrasi NaOH 4% sebesar 74,11-74,89 mm/g/det, sedangkan pada konsentrasi KOH 5% diperoleh 84,22-84,89 mm/g/det. Viskositas dan kekuatan gel tersebut masih memenuhi standar yang ditetapkan oleh Food Agriiculture Organization (FAO).Kata kunci: Karagenan, pewarna alami, Kappaphycus alvarezii, viskositas, kekuatan gel
The Effect of Bait Type on Total Catch of Skipjack Tuna (Katsuwonus Pelamis) by Using Hand Line Larengka, Falenscya; Manoppo, Lefrand; Manu, Lusia; Sitanggang, Effendi P.; Luasunaung, Alfred; Kayadoe, Mariana E.
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.41949

Abstract

A hand line is one type of fishing gear that is often used by traditional fishermen to catch fish. Hand lines are categorized as active fishing gear and are also environmentally friendly. The operation of the equipment is relatively simple, it does not use a lot of auxiliary equipment such as fishing trawls and ring trawls.  This research was conducted in March and April 2022 in the Alo village, District Rainis, Talaud Islands Regency. The purpose of this study was to determine the best type of bait for catching skipjack tuna (Katsuwonus pelamis) with hand lines and to identify other types of fish caught. The method used in this research is a descriptive and participatory method, namely collecting data on catches in the fishing ground. Data analysis used a Randomized Block Design. The three types of bait used are artificial bait (silk), live fish bait, and chicken feathers. During this research, totally caught as many as 57, that is skipjack tuna (Katsuwonus pelamis) 31 (54.39%), mackerel tuna (Euthynnus affinis) 17  (29.82%), and mahi-mahi (Coryphaena hippurus) 9 (15.79). Based on the data analysis, the treatment of the type of hand line bait did not affect to catch.Keywords: skipjack; hand line; bait; catch. Abstrak        Pancing ulur merupakan salah satu jenis alat penangkapan ikan yang sering digunakan oleh nelayan tradisional untuk menangkap ikan di laut dan termasuk alat penangkapan ikan yang aktif dan juga ramah lingkungan. Penelitian ini dilakukan pada Maret dan April 2022 di desa  Alo, Kecamatan Rainis, Kabupaten Kepulauan Talaud. Tujuan penelitian adalah mengetahui jenis umpan yang terbaik untuk menangkap ikan cakalang (Katsuwonus pelamis) dengan pancing ulur dan mengetahui jenis ikan lainnya yang tertangkap.  Metode yang digunakan adalah metode deskriptif dan partisipatif, yaitu pengambilan data hasil tangkapan di daerah penangkapan (fishing ground). Analisis data menggunakan Rancangan Acak Kelompok.Tiga jenis umpan yang digunakan adalah umpan tiruan (kain sutera), umpan ikan hidup dan bulu ayam. Selama penelitian, total ikan yang tertangkap sebanyak 57 ekor ikan yang terdiri dari cakalang (Katsuwonus pelamis) sebanyak 31 ekor (54,39%), tongkol (Euthynnus affinis) sebanyak 17 ekor (29,82%) dan lemadang (Coryphaena hippurus) sebanyak 9 ekor (15,79%). Berdasarkan analisis data, perlakuan jenis umpan pancing ulur tidak berpengaruh terhadap hasil tangkapan.Kata kunci : cakalang, pancing ulur, umpan dan hasil tangkapan.
Crustacea Brachyura Morphology And Morphometrically in Buloh Beach Intertidal Zone, Minahasa District, North Sulawesi Jumeini, Jumeini; Paransa, Darus S. J.; Schaduw, Joshian N. W.; Mantiri, Desy M. H.; Pelle, Wilmy E.; Manu, Gaspar D.
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.42078

Abstract

Brachyura crabs, especially coastal crabs, live in the intertidal zone with zone shape sandy beaches, muddy beaches, and rocky beaches. The colors on the crab’s carapace are caused by the presence of carotenoid pigments. The purpose of the study was to identify crabs morphologically and morphometrically. The sampling location was in Buloh Beach, Tateli Weru Village, Mandolang District, Minahasa Regency, North Sulawesi Province. Sampling using the cruise method, which is a research activity carried out by tracing the coastal area at the lowest tide by capturing organisms as samples directly. The crab samples found then morphologically identified by observing the color and shape of the carapace, claws, walking legs, presence of spines on the carapace, carapace size, abdomen shape, the characteristics of the leg organs presence of hair (setae), and morphometric calculations were also carried out. Based on the morphology of the crabs found, namely: Grapsus albolineatus (Latreille in Milbert, 1812), Atergatis floridus (Linnaeus, 1767), Pilumnus vespertilio (Fabricius, 1793), and Uca (Galasimus) tetragonon (Herbst, 1790)Keywords: Buloh Beach; Brachyura; Morphology; morphometrically; DiversityAbstrakKepiting brachyura khususnya kepiting pesisir hidup di zona intertidal dengan bentuk zona pantai berpasir, pantai berlumpur dan pantai berbatu. warna-warna pada karapas kepiting disebabkan karena adanya kandungan pigmen karotenoid. Tujuan penelitian untuk mengidentifikasi kepiting secara morfologi dan morfometrik. Lokasi pengambilan sampel di Pantai Buloh, Desa Tateli Weru, Kecamatan Mandolang, Kabupaten Minahasa, Provinsi Sulawesi Utara. Pengambilan sampel menggunakan metode jelajah (cruise methods) yaitu suatu kegiatan penelitian dilakukan dengan menelusuri daerah pesisir pantai saat surut terendah dengan menangkap organisme sebagai sampel secara langsung. Sampel kepiting yang ditemukan kemudian dilakukan identifikasi morfologi dengan memperhatikan warna dan bentuk karapas, capit, kaki jalan, keberadaan duri pada karapas, ukuran karapas, bentuk abdomen dan ciri-ciri organ kakinya seperti keberadaan rambut (setae), serta dilakukan perhitungan morfometrik. Berdasarkan identifikasi morfologi kepiting yang ditemukan, yaitu: Grapsus albolineatus (Latreille in Milbert, 1812), Atergatis floridus (Linnaeus, 1767), Pilumnus vespertilio (Fabricius, 1793), dan  Uca (Galasimus) tetragonon (Herbst, 1790).Kata kunci : Pantai Buloh; Brachyura; Morfologi; Morfometrik; Keanekaragaman
The form and distribution of microplastic in sediment and water columns of Manado Bay, North Sulawesi Imanuel, Tonny; Pelle, Wilmy E.; Schaduw, Joshian N. W.; Paulus, James J. H.; Rumampuk, Natalie D. C.; Sangari, Joudy R. R.
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.42085

Abstract

Microplastics are particles measuring <5mm that is the result of degradation from plastic waste that enters the environment. Plastic waste is degraded into microplastics through physical, chemical, and biological processes. Pollutants such as microplastics that enter the waters of Manado Bay can reduce the biological and ecological functions of the ecosystem in the waters. The purpose of this study was to determine the shape and density of microplastics in Manado Bay. The sediment sampling method was carried out by purposive sampling method and for the water, column using a plankton net withdrawal method of 10 meters with 3 replications at 3 stations. The sample will be prepared and then identified. Then the sample density was calculated and then analyzed using a one-way ANOVA test and Pearson correlation. The results showed that there were 4 forms of microplastic found, namely the form of fragments, films, fibers, and foams. The density of sediment sample 1 found 187 microplastic particles with a density of 63.38 particles/kg, at station 2 a total of 479 particles with a density of 182.12 particles/kg, and at station 3 a total of 311 particles with a density of 115.07 particles/kg. In station 1 seawater samples were found 154 particles with a density of 7.26 particles/m³, station 2 a total of 299 particles with a density of 14.10 particles/m³.Keywords: microplastic, shape, density, Manado Bay AbstrakMikroplastik adalah partikel berukuran <5mm hasil degradasi dari sampah plastik yang masuk ke lingkungan. Sampah plastik terdegradasi menjadi mikroplastik melalui proses fisik, kimia, dan biologis. Bahan pencemar mikroplastik yang masuk ke perairan Teluk Manado dapat mengurangi fungsi biologis dan ekologis dari ekosistem yang ada di dalam perairan. Tujuan penelitian ini yaitu untuk mengetahui bentuk dan distribusi mikroplastik yang ada di Teluk Manado. Metode pengambilan sampel sedimen dilakukan dengan metode purposive sampling dan untuk kolom perairan menggunakan metode penarikan plankton net sepanjang 10 meter sebanyak 3 kali ulangan di 3 stasiun. Sampel akan dipreparasi kemudian diidentifikasi. Selanjutnya sampel dihitung kepadatannya kemudian dianalisis menggunakan uji one-way ANOVA dan korelasi Pearson. Hasil penelitian menunjukan bahwa terdapat 4 bentuk mikroplastik yang ditemukan yaitu bentuk fragmen, film, fiber, dan busa. Kepadatan pada sampel sedimen 1 ditemukan 187 partikel mikroplastik dengan kepadatan 63,38 partikel/kg, pada stasiun 2 total 479 partikel dengan kepadatan 182,12 partikel/kg, dan pada stasiun 3 total 311 partikel dengan kepadatan 115,07 partikel/kg. Pada sampel air laut stasiun 1 ditemukan 154 partikel dengan kepadatan 7,26 partikel/m³, stasiun 2 total 299 partikel dengan kepadatan 14,10 partikel/m³.Kata kunci: mikroplastik, bentuk, kepadatan, Teluk Manado
Isolation and Antibacterial Activity assay of Endophytic Symbiont Bacteria on Seaweed Gracilaria verrucosa originated from Batu Meja Tongkaina Beach, North Sulawesi Sirri, Yolanda; Warouw, Veibe; Rumengan, Inneke Fenny; Paransa, Darus Sa'adah; Undap, Suzanne Lydia; Ginting, Elvy Like
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Seaweed can produce bioactive compounds such as antibacterial. Seaweed co-exists with bacteria endophytes. Entophytic bacteria are bacteria that live in host tissues and have the ability to protect the host itself by producing antibacterial compounds against pathogens. Therefore, the endophytic bacteria of seaweed symbionts can be utilized to produce antibacterial compounds. Bacteria can be mass-cultured because of their fast-growing characteristic. The aim of this study was to determine the antibacterial activity from endophytic symbiont bacteria on seaweed Gracilaria verrucosa originated from Batu Meja Tongkaina Beach, North Sulawesi. Isolation of bacteria was carried out by dilution steps from 101 to 10־3 times, then cultivation on Nutrient Agar media to obtain a single colony of the bacteria. Antibacterial activity was tested used paper disc diffusion method. The pathogens used were bacterial strains of Escherichia coli, Staphylococcus aureus, Streptococcus mutans, and Salmonella typhi. Moreover, antibiotics were used as positive controls. The antibacterial ability of the symbiotic bacteria was measured based on inhibition zones around the paper disc containing the isolates of endophytic bacteria. A total of 6 endophytic bacterial isolates were found, namely isolate B, C, D, E, F and G, characterized by different morphological features. The results showed that isolates B and C having inhibition zone of 0.5 – 1.0 mm against S. typhi, indicating that these two isolates produce antibacterial compounds with a weak ability  against S. typhi.
Identification of Bioactive Compounds and Antibacterial Activity of Sea Cucumber, Holothuria (Halodeima) atra Jaeger 1833 Flesh Extract from Kalasey Coastal Waters, Minahasa District Mewengkang, Theresia Tessa; Lintang, Rosita Anggreiny; Losung, Fitje; Sumilat, Deiske Adeliene; Lumingas, Lawrence J. L
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.42271

Abstract

Sea cucumbers are one of the marine biotas that contain bioactive compounds that have the potential as antibacterial ingredients. The purpose of this study was to perform antibacterial testing on fractions of the extract of the sea cucumber H. atra meat and to conduct a zoochemical analysis to determine the content of bioactive compounds that can inhibit bacterial growth. Antibacterial testing using disc diffusion method against Staphylococcus aureus and Escherichia coli bacteria. The results showed that the methanol extract of sea cucumber flesh could inhibit the growth of both types of test bacteria. In antibacterial testing for S. aureus, the ethyl acetate fraction was 11.8 mm, the n-hexane fraction was 7 mm, and the methanol fraction was 8.6 mm, while for E. coli the ethyl acetate fraction was 10.88 mm, the n-hexane fraction was 7 mm, and 8.6 mm methanol fraction. The compounds contained in the ethyl acetate fraction of sea cucumber H. atra flesh extract are alkaloids, flavonoids, steroids, and saponins which are compounds that can inhibit bacterial growth with their respective working mechanisms.Keywords: Disc diffusion, Extraction, Fractionation, Sea cucumber (H.atra), Zoo-chemical, AbstrakTeripang merupakan salah satu biota laut yang memiliki kandungan senyawa bioaktif yang berpotensi sebagai bahan antibakteri. Tujuan penelitian ini melakukan pengujian antibakteri pada fraksi-fraksi dari ekstrak daging teripang H. atra dan melakukan analisis zookimia untuk mengetahui kandungan senyawa bioaktif yang dapat menghambat pertumbuhan bakteri. Pengujian antibakteri menggunakan metode difusi cakram terhadap bakteri Staphylococcus aureus dan Escherichia coli. Hasil penelitian menunjukkan bahwa ekstrak metanol daging teripang memiliki dapat menghambat pertumbuhan kedua jenis bakteri uji. Pengujian antibakteri terhadap S. aureus fraksi etil asetat sebesar 11,8 mm, fraksi n-heksan 7 mm, dan fraksi metanol 8,6 mm sedangkan untuk bakteri E. coli fraksi etil asetat sebesar 10,88 mm, fraksi n heksana 7 mm, dan fraksi metanol 8,6 mm. Kandungan senyawa yang yang terkandung dalam fraksi etil asetat ekstrak daging teripang H. atra yaitu senyawa alkaloid, flavonoid, steroid, dan saponin yang merupakan senyawa yang dapat menghambat pertumbuhan bakteri dengan mekanisme kerja masing-masing.Kata Kunci  : Difusi cakram, Ekstraksi, Fraksinasi , Teripang (H. atra), Zoo-kimia,
Morphology and Morfometric Study of Crabs Species Caught on the Coast of Mokupa, Minahasa District, North Sulawesi Pelafu, Widya; Paransa, Darus Saadah J.; Mantiri, Desy M. H; Kemer, Kurniati; Bara, Robert A.; Batarogoa, Nego E.
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.42283

Abstract

Crabs are organisms that have been found moving actively in tidal areas. One is in the coastal area of Mokupa, Whare the study boasts a great diversity of poorly informed crabs. this study aims to identify the morphology and diversity of crab species during the full moon and late nephew phase. The location for sampling is on the coast of Mokupa Beach, Minahasa Regency, North Sulawesi.  This research was conducted using the roaming method and captured directly at night at the lowest low tide based on the phases of the full moon and late nephew. Furthermore, the collected crabs were identified by morphology, body length, body color, carapace shape, pair of claws, walking legs, and abdomen, and morphometric calculations were performed. Based on the morphological identification found, namely: Thalamita crenata, Geograpsus crinipes, Selatium brocki, and Sesarmops impressus.Keywords: Coastal beaches, Morphology, Crab type. AbstrakKepiting merupakan organisme yang ditemukan bergerak aktif di daerah pasang surut. Salah satunya di daerah pesisir Pantai Mokupa, lokasi ini memiliki banyak keanekaragaan jenis kepiting yang belum terinfomasi dengan baik. Penelitian ini bertujuan mengidentifikasi morfologi dan keanekaragaman jenis kepiting saat fase bulan purnama dan perbani akhir. Lokasi penangkapan sampel di pesisir Pantai Mokupa, Kabupaten Minahasa.Sulawesi Utara, dilakukan mengunakan metode jelajah dan ditangkap langsung pada ­waktu malam hari saat surut terendah berdasarkan fase bulan purnama dan perbani akhir. Selanjutnya, kepiting yang yang terkumpul diidentifikasi morfologi diamati ukuran panjang tubuh, warna tubuh, bentuk karapas, sepasang capit, kaki jalan dan abdomen, serta dilakukan perhitungan morfometrik. Berdasarkan identifikasi morfologi ditemukan, yaitu: Thalamita crenata, Geograpsus crinipes, Selatium brocki dan Sesarmops impressus. Kata  kunci: Pesisir pantai,  Morfologi, Jenis kepiting.

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