cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota manado,
Sulawesi utara
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
 24   25   26   27   28 
Utilization Of Geographic Information System (Gis) For Selection Of Idle Pond For Vannamei Shrimp Cultivation Aris, Muhammad; Wahiddin, Nurhalis; Irham, Irham
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.35727

Abstract

Land suitability is one aspect that determines the success of vannamei shrimp cultivation in coastal pond areas. Cultivation of vannamei shrimp in ponds has a spatial component as well as differences in the biophysical and socio-economic characteristics of each location. Many ponds that are intensively managed have not taken advantage of the advantages of Geographical Information Systems (GIS) in selecting locations and managing vannamei shrimp culture, which is important to do to avoid business failure. This study used a survey method to collect data on water quality parameters (acidity / pH, temperature, salinity, dissolved oxygen / DO, nitrate, and phosphate). Analysis of land suitability for vannamei shrimp cultivation in ponds using the scoring method, each water quality parameter is weighted and a score is then divided into 4 land suitability classes, namely classes S1 (Very Suitable), S2 (Sufficiently Suitable), S3 (Conditional Appropriate), and N (Unsuitable). The results showed that the vannamei shrimp pond land suitability map produced a thematic map of the suitability of the vannamei shrimp pond land which had a total area of 13.65 ha of vannamei shrimp and had 4 levels of suitability, namely very suitable class (S1) with an area of 3.96 ha, a class that appropriate (S2) has an area of 7.8 ha, a moderately suitable class (S3) has an area of 0.85 ha, and an unsuitable class (N) has an area of 1.04 ha.Keywords: Litopenaeus vannamei; Water quality; Land Suitability; Geographical Information SystemsAbstrakKesesuaian lahan merupakan salah satu aspek yang menentukan keberhasilan kegiatan budidaya udang vannamei di wilayah tambak pesisir. Budidaya udang vannamei di tambak memiliki komponen keruangan serta perbedaan karakteristik biofisik dan social ekonomi dari setiap lokasi. Banyak tambak yang dikelola secara intensif belum memanfaatkan kelebihan Sistem Informasi Geografis (SIG) dalam melakukan pemilihan lokasi dan pengelolaan budidaya udang vannamei, dimana hal tersebut penting dilakukan untuk menghindari kegagalan usaha. Penelitian ini menggunakan metode survei untuk pengambilan data parameter kualitas air (keasaman/pH, suhu, salinitas, oksigen terlarut/DO, nitrat, dan fosfat). Analisis kesesuaian lahan budidaya udang vannamei di tambak menggunakan metode skoring, parameter kualitas air masing-masing diberi bobot dan skor yang kemudian dibedakan menjadi 4 kelas kesesuaian lahan yaitu kelas S1 (Sangat Sesuai), S2 (Cukup Sesuai), S3 (Sesuai Bersyarat), dan N (Tidak Sesuai). Hasil penelitian didapatkan peta kesesuaian lahan tambak udang vannamei menghasilkan peta tematik kesesuaian lahan tambak udang vannamei memiliki total luas tambak udang vannamei seluas 13,65 Ha serta memiliki 4 tingkat kesesuaian yaitu kelas sangat sesuai (S1) dengan luasan sebesar 3,96 Ha, kelas yang sesuai (S2) memiliki luasan sebesar 7,8 Ha, kelas yang cukup sesuai (S3) memiliki luasan sebesar 0,85 Ha, dan kelas yang tidak sesuai (N) memiliki luasan sebesar 1,04 Ha.Kata Kunci: Litopenaeus vannamei, Kualitas Perairan; Analisa Kesesuaian; Sistem Informasi Geografis
Composition Of Types And Distribution Of Faviidae Corals In The Bahowo Reef Fall, Tongkaina, Manado City Wewengkang, Fabiola; Pratasik, Silvester B.; Lalamentik, Laurentius Th. X.; Rembet, Unstain; Manu, Gaspar; Sambali, Hariyani
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.37295

Abstract

Coral reef is an ecosystem built by calcium-producing marine biota, especially corals. One of the reef-building corals (hermatypic) is Faviidae that is distributed in almost all territories of Indonesia. This study was carried out in the reef flat of Bahowo, Tongkaina, Manado. Data collections used the sampling method with quadrat. There were 6 genera of Faviidae recorded in this study, Favia, Favites, Goniastrea, Leptoria, Montastrea, and Platygyra with clumped distribution patterns.Keywords: hermatypic; genera; ecosystem; quadrat. AbstrakTerumbu karang merupakan ekosistem yang dibangun oleh biota laut penghasil kapur, terutama oleh hewan karang. Salah satu karang pembentuk terumbu (hermatipik) adalah karang batu Faviidae yang memiliki penyebaran hampir di seluruh wilayah Indonesia. Penelitian ini dilakukan di rataan terumbu Bahowo, kelurahan Tongkaina, kota Manado. Berdasarkan hasil pencatatan data dengan menggunakan metode sampling kuadrat yang kemudian diolah dan dianalisis secara statistik dengan menggunakan perangkat lunak (MS Excel) diperoleh 6 genera karang batu Faviidae, yaitu Favia, Favites, Goniastrea, Leptoria, Montastrea, dan Platygyra dengan pola distribusi yang mengelompok.Kata kunci: hermatipik; ekosistem; genera; kuadrat.
Persentage of Coral Cover and Megabenthos Diversity in “Tanjung Jaha”, Tanjung Pulisan Waters, North Minahasa Regency Daryanto, Adityas Andrew; Mamangkey, Noldy Gustaf; Manembu, Indri S; Boneka, Farnis B.; Sinjal, Cathrien A. L; Kambey, Alex D.
Jurnal Ilmiah Platax Vol. 9 No. 2 (2021): ISSUE JULY-DECEMBER 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v9i2.36426

Abstract

Tanjung Pulisan waters, especially the “Tanjung Jaha” are one of the diving tourism areas and have been designated as part of Likupang Special Economic Zone (SEZ), which has also been included in one of five super-priority tourist destinations in Indonesia. Based on the assumptions that tourism activities in the area would be very massive, it is presumed that the “Pantai Kecil” area will be affected by those activities. Therefore, this study aims to provide data on coral cover and megabenthic diversity, as a basis data for further research and or for policy decisions in the region. This study used the Benthos Belt Transect (BBT) method and the Underwater Photo Transect (UPT) method and they were analyzed with CPCE (Coral Point Count with Excel Extensions) and Microsoft Excel. The results showed that the percentage of coral cover in “Tanjung Jaha” was categorized as “Good” with a value of 55.92% which included 41.36% hard corals and 15.31% soft corals. At this location, 26 megabenthos were found which consisted of 5 different taxa and the diversity index was categorized as “Medium” with the value of H’=1.36.Keywords:     Coral Cover; Diversity; Pantai Kecil; Tanjung PulisanAbstrakPerairan Tanjung Pulisan, khususnya “Tanjung Jaha” merupakan salah satu daerah wisata penyelaman dan telah ditetapkan menjadi bagian dari Kawasan Ekonomi Khusus (KEK) Likupang dan juga masuk dalam salah satu dari lima destinasi wisata super prioritas di Indonesia. Dengan aktivitas pariwisata yang akan sangat masif, diperkirakan wilayah “Tanjung Jaha” akan terdampak oleh aktivitas pariwisata. Maka dari itu penelitian ini bertujuan untuk menyediakan data tutupan karang dan keanekaragaman megabentos, sebagai data awal sebagai informasi bagi riset selanjutnya maupun pada kebijakan yang akan berlaku di daerah tersebut. Penelitian ini menggunakan metode Benthos Belt Transect (BBT) dan metode Underwater Photo Transect (UPT) dengan analisa menggunakan CPCe (Coral Point Count with Excel extensions) dan Microsoft Excel. Hasil analisis menunjukan persentase tutupan karang di “Tanjung Jaha” terkategorikan “Baik” dengan nilai 55.92% yang terdiri dari 41.36% karang keras dan 15.31% karang lunak. Di lokasi ini ditemukan 26 megabentos dari 5 taksa berbeda dengan indeks keanekaragaman terkategorikan “Sedang” dengan nilai H’=1.36.Kata kunci: Keanekaragaman; Pantai Kecil; Tutupan Karang; Tanjung Pulisan
Identification And Diversity Of Crab In Pondang And Lopana Beach Waters, South Minahasa Lepa, Bryan Gabriel; Paransa, Darus Saadah J; Mantiri, Desy M. H; Boneka, Farnis B; Lumoindong, Frans; Tilaar, Ferdinand F.
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.38004

Abstract

There are crab species that live in the forest and supratidal areas, on sandy, rocky, and muddy coastal areas. The aim of this research is to identify the morphology, of meristic crabs and the effect of the moon phase on species diversity. Sampling locations were on the coast of Pondang Village and Lopana Village, sampling using the roaming method and carried out at the two lowest low tide phases during the dead moon and full moon phases, during the lowest low tide crabs were generally found with walking legs. Based on the identification of the morphology of crabs found on the coast of Pondang Village and Lopana Village, East Amurang District, South Minahasa Regency, there are six species of them Ocypode ceratophthalmus (Stimpson, 1858), Grapsus albolineatus (Latreille in Milbert, 1892), Eriphia sebana (Shaw and Nodder, 1803), Atergatis floridus (Linnaeus, 1767), Pilumnus vespertilio (Fabricius, 1793), Episesarma mederi (Edwards, 1853). Keywords: Coastal; Habitat; Crabs; Morphology; meristic AbstrakTerdapat jenis kepiting yang hidup di daerah hutan dan supratidal, di daerah pesisir pantai berpasir, berbatu dan berlumpur. Tujuan penelitian mengidentifikasi secara morfologi, meristik kepiting dan pengaruh fase bulan terhadap keanekaragaman spesies. Lokasi pengambilan sampel di pesisir pantai Kelurahan Pondang dan Desa Lopana, pengambilan sampel menggunakan metode jelajah serta dilakukan pada dua fase surut terendah saat fase bulan mati dan purnama, saat surut terendah umumnya dijumpai kepiting yang memiliki kaki jalan. Berdasarkan identifikasi morfologi kepiting yang ditemukan di pesisir pantai Kelurahan Pondang dan Desa Lopana, Kecamatan Amurang Timur, Kabupaten Minahasa Selatan, terdapat enam spesies antaranya Ocypode ceratophthalmus (Stimpson, 1858), Grapsus albolineatus (Latreille dalam Milbert,1892), Eriphia sebana (Shaw dan Nodder, 1803), Atergatis floridus  (Linnaeus, 1767), Pilumnus vespertilio (Fabricius, 1793), Episesarma mederi (Edwards, 1853). Kata Kunci : Pesisir; Habitat; Kepiting; Morfologi; Meristik
Antibacterial Activity of Stylissa carteri Sponge Extract from Manado Bay, North Sulawesi Palungan, Irpan; Bara, Robert Antonius; Mangindaan, Remy Emile Petrus; Kemer, Kurniati; Wullur, Stenly; Rembet, Unstain N. W. J.
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.36020

Abstract

Marine sponges contain secondary metabolites with unique chemical structures and very interesting pharmacological activities, such as antibacterial, anticancer, antiviral and others to be developed as candidate drugs. The presence of bioactive metabolites in sessile nature such as sponges also reflects the ecological adaptation formed during a long evolutionary process as a defense mechanism of this organism with its environment in the form of resistance to predation, competition and infection factors against pathogenic bacteria, so this study aims to examine the antibacterial activity of extracts and fractions of Stylissa carteri sponge fractions as well as testing the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) values. The method used in testing the antibacterial activity is the agar diffusion method (Disc Diffusion Kirby Bauer Method). The presence of antibacterial activity was indicated by the formation of a clear zone around the paper disc after incubation for 24 hours. The results showed that antibacterial activity of S. carteri sponge extract tested on Bacillus megaterium DSM32T bacteria revealed to be the strongest inhibition zone of 21 mm. Further testing on the extract fraction of S. carteri showed that the semipolar fractions showed strong activity against the B. megaterium while the polar fraction was categorized as moderate action, the non-polar fraction showed no activity against the bacteria. The determination of the MIC and MBC values was obtained at 500 ppm and 1000 ppm respectively.
Early Warning of Heavy Metal Pollution in the Waters of Obi Island Based on Plankton Elements Tamrin, Tamrin; Aris, Muhammad
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.37329

Abstract

Industrial activities that are around the waters will donate dangerous heavy metals and enter the waters through rivers. Heavy metal pollution is very dangerous for animals, plants, and humans. Exposure to heavy metals in humans occurs through the food chain. Pollution observation methods using living organisms such as plankton as bioindicators are more effective. As an indicator of biological, composition, and abundance of plankton can provide a guide for monitoring the occurrence of pollution by using the saprobic index. This research aims to determine the level of pollution in the waters of Obi Island. The results of identification of plankton samples found 17 genera phytoplankton in 2 different classes, Diatom and Dinoflagellate, and 3 genera of zooplankton class. The average abundance of phytoplankton from the results of the study was 5.253 individual/L which means that the water conditions were mesotrophic. Meanwhile, the average abundance of zooplankton is 57 individuals/m3. The saprobic index and trophic saprobic index analysis tend to show that the waters are in the mild to moderate polluted category, where the waters are at the β-Mesosaprobic level.Keywords: Phytoplankton; Zooplankton; SI index; Obi island AbstrakKegiatan industri pertambangan di Kawasi merupakan pertambangan untuk memperoleh biji nikel (Ni). Biji Ni umumnya berasosiasi dengan log am berat lainnya seperti tembaga (Cu), arsenik (As), besi (Fe), dan platina (Pt) sehingga berpeluang besar masuk ke perairan di sekitar kawasan pertambangan melaluli aliran sungai. Interaksi yang terjadi dalam ekosistem perairan sungai dan beban masukan yang tidak terkendali dapat mempengaruhi ketersediaan unsur hara dan fitoplankton. Fitoplankton merupakan parameter biologi yang dapat di jadikan indikator untuk mengevaluasi kualitas dan tingkat kesuburan perairan. Sebagai indikator biologi komposisi dan kelimpahan fitoplankton dapat memberikan petunjuk untuk memantau terjadinya pencemaran dengan menggunakan indeks saprobitas. Hasil identifikasi sampel plankton yang dijumpai berjumlah 17 genus fitoplankton dalam 2 kelas berbeda, yaitu diatom dan Dinoflagellate, serta 3 genus zooplankton kelas copepoda. Dari hasil penelitian ini, kelas fitoplankton yang paling banyak tercacah adalah diatom atau Bacillariophyceae. Rata – rata kelimpahan fitoplankton (Diatom dan Dinoflagellata) dari hasil penelitian sebesar 15.503 ind/L. Hal ini, berarti bahwa kelimpahan perairan pada lokasi penelitian dalam kondisi tinggi (eutotrof). Jenis zooplankton yang tercacah merupakan zooplankton kelas copepoda yang terdiri atas Oithona sp.; Corycaeus sp.; dan Paracalunus sp. Analisis SI dan TSI cenderung menunjukan perairan berada pada kategori tercemar ringan sampai sedang, dimana perairan berada pada tingkat β- Mesosaprobik.Kata Kunci: Biji Nikel; Fitoplankton; Zooplankton; Indeks SI dan TSI.
Community Structure And Attraction Of Reef Fish Associated With Artificial Reef In The Tahuna Bay Makawaehe, Wenseslaus Fransiscus; Kusen, Janny D.; Manoppo, Lefrand; Bataragoa, Nego E.; Sambali, Haryani; Sumilat, Deiske A.; Mantiri, Rose O. S. E.
Jurnal Ilmiah Platax Vol. 9 No. 2 (2021): ISSUE JULY-DECEMBER 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v9i2.34761

Abstract

 Community structure and interest of coral fish associated with artificial reefs in The Bay of Tahuna Sangihe Islands Regency is carried out in relation to increased coral fish production in Tahuna Bay. In addition to sandy waters and seagrass so that environmental engineering is pursued with artificial reefs. Artificial reefs are deployed in 5 locations with a depth of about 8 and underwater observations are carried out in data retrieval using the Underwater Visual Census (UVC) method. The data is processed to get a profile of the community structure of coral fish that can be associated with artificial reefs. The composition of coral fish species consists of target fish 9 families; 14 species, major fish 6 families; 7 species and fish indicator 1 family; 1 species. Indicator fish are generally eaters of the ends of young branch corals, branch corals have not grown in artificial reef structures. The diversity index (H') of the moderate category (+2.5) with a high, stable community, evenness (E) level or classified as a relatively high, uniformity (S) high. A low dominance index (C) indicates no species dominates. Mann-Whitney analysis about the level of fish interest to artificial reefs structure both in morning and evening showed no significant difference, while the highest acquisition of Important Values Indices of coral fish in the morning and evening, is Dascyllus trimaculatus by + 73,15. Generally, artificial reef indicates that the coral fish community was maximum developed yet, it was suspected that the coral fish community is still in the stage of adjustment or adaptation to the new environmental structure.Keywords: Community Structure; Artificial Reef; Associate Fishes; gulf TahunaAbstrakStruktur komunitas dan ketertarikan ikan karang yang  berasosiasi dengan terumbu buatan di Teluk Tahuna Kabupaten Kepulauan Sangihe dilakukan dalam kaitan dengan peningkatan produksi ikan karang di Teluk Tahuna. Selain karena perairan berpasir dan lamun sehingga diupayakan suatu rekayasa lingkungan dengan penempatan terumbu buatan. Terumbu buatan diletakkan (deploy) di 5 lokasi dengan kedalaman sekitar 8 dan dilakukan pengamatan bawah air dan pengambilan data menggunakan metode Underwater Visual Census (UVC). Data diolah  untuk mendapatkan profil struktur komunitas ikan-ikan karang yang dapat berasosiasi dengan terumbu buatan. Komposisi jenis ikan karang terdiri dari ikan target 9 family; 14 spesies, ikan mayor 6 family; 7 spesies dan ikan indikator 1 family; 1 spesies. Ikan indikator yang umumnya pemakan ujung karang cabang muda, karang cabang belum bertumbuh di struktur terumbu buatan. Indeks keanekaragaman (H’) kategori sedang (+ 2,5) dengan kemerataan (E) tergolong tinggi, komunitas stabil, keseragaman (S) tinggi. Indeks dominansi (C) rendah mengindikasikan tidak ada spesies mendominasi. Hasil Analisis Mann-Whitney terhadap tingkat ketertarikan ikan terhadap terumbu buatan baik pagi dan sore hari menunjukkan tidak ada perbedaan yang nyata artinya terumbu buatan mampu menarik ikan karang untuk berlindung dan mencari makan, sedangkan perolehan tertinggi Index Nilai Penting ikan karang saat pagi dan sore hari yaitu Dascyllus trimaculatus sebesar 72.04% dan 74.27% Secara umum menunjukkan terumbu buatan belum berkembang maksimal, di duga komunitas Ikan karang masih dalam tahap penyesuaian atau adaptasi dengan struktur terumbu buatan di lingkungan yang baru.Kata kunci: struktur komunitas; terumbu buatan; ikan asosiasi; teluk tahuna
Community Structure of Hard Coral (Scleractinia) in the Walenekoko Reef Flat, Pasir Panjang, Bitung City Pratiwi, Utary; Kambey, Alex D.; Lalamentik, Laurentius Th. X.; Tilaar, Ferdinand Frans; Mandagi, Stephanus Vianny; Manembu, Indri S.
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.37277

Abstract

Coral reefs are one of the potential good water resources in Indonesian marine waters. Ecologically, coral reefs can only develop in tropical climates. Hard coral is one of the important components as a constituent of coral reef ecosystems and plays an important role for marine biota. The research was conducted at the reef flat of Walenekoko Village, Pasir Panjang Village, South Lembeh District, Bitung City. The research covers the species, family and life form composition, and ecological indices (diversity, species equitability, and dominance indices). The research was carried out with an Underwater Photo Transect (UPT) method. The results obtained 18 types of hard corals belonging to 5 families. Montipora samarensis was the most abundant coral in the area with 43% of the community composition. The Faviidae family and Acroporidae (33%) had the largest percentage in all transects. The form of coral growth consisted of Acropora Submassive (ACS) 53%, Coral Massive (CM) 30%, and for Acropora Branching (ACB) 16%. The highest diversity value is at point 3 of 1.64, and point 1 of 1.60, while the lowest is at point 2 of 0.56. The evenness index obtained at point 1 is 0.70, and at point 2 is 0.30. The dominance values obtained ranged from 0.25 to 0.52.Keywords: Community Structure; Hard Coral; Reef FlatAbstrakTerumbu karang merupakan salah satu potensi sumberdaya perairan yang baik di perairan laut Indonesia. Secara ekologis terumbu karang hanya dapat berkembang di wilayah beriklim tropis. Karang keras merupakan salah satu komponen penting sebagai penyusun ekosistem terumbu karang dan berperan penting bagi biota laut. Penelitian ini dilakukan di rataan terumbu Desa Walenekoko, Desa Pasir Panjang, Kecamatan Lembeh Selatan, Kota Bitung. Penelitian meliputi komposisi spesies, famili, dan bentuk kehidupan, serta indeks ekologi (keanekaragaman, keseragaman spesies, dan indeks dominasi). Penelitian dilakukan dengan metode Underwater Photo Transect (UPT). Hasil penelitian diperoleh 18 jenis karang keras yang termasuk dalam 5 famili. Montipora samarensis adalah spesies yang paling banyak ditemukan di daerah tersebut dengan persentase 43%. Famili Faviidae dan Acroporidae (33%) memiliki persentase terbesar di semua transek. Bentuk pertumbuhan karang terdiri dari: Acropora Submassive (ACS) 53%, Coral Massive (CM) 30%, dan untuk Acropora Branching (ACB) 16%. Nilai keanekaragaman tertinggi yaitu pada titik 3 sebesar 1,64, dan titik 1 sebesar 1.60, sedangkan yang termasuk rendah yaitu pada titik 2 sebesar 0,56. Indeks kemerataan diperoleh pada titik 1 sebesar 0,70, dan pada titik 2 sebesar 0.30. Nilai dominasi diperoleh berkisar antara 0.25 hingga 0.52.Kata kunci: Struktur Komunitas; Karang Keras; Rataan Terumbu.
Study Of Hard Coral (Scleractinia) Recruitment In The Molas Waters, Manado City Oli, Aris Putra; Roeroe, Kakaskasen A; Paruntu, Carolus P; Kusen, Janny D; Manembu, Indri S; Mandagi, Stephanus V
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.37489

Abstract

Coral recruitment is the entry of new coral individuals into coral reef populations due to reproduction or migration. Juvenile coral is the result of metamorphosis and growth of coral planula measuring 5 cm and attached to certain substrates. There are two types of substrates in the waters, stable substrates and unstable substrates such as rubble. The purpose of this study was to study hard coral recruitment, both in terms of density, the composition of juvenile coral colony types, size, and the type of substrate occupied by juvenile corals. This research was conducted in August 2021 in the waters of Molas, Bunaken District, Manado City. The method used for site selection is the purposive sampling method and data collection using a sampling method with quadrant transects. The results showed that the density of coral recruitment at the study site was 8,43 colonies/m2. The percentage of juvenile coral attachment on stable substrates is 90% and 10% on unstable substrates. The average size of juvenile corals at the study site was 2.4cm. The composition of the juvenile coral genus found at the research site were corals of the genus Acropora, Anacropora, Coeloseris, Cycloseris, Cyphastrea, Echinopora, Favites, Fungia, Galaxea, Goniastrea, Isopora, Leptastrea, Leptoseris, Lobophyllia, Merulina, Montastrea, Montipora, Oulophyllia, Pachyseris, Pavona, Platygyra, Plasiastrea, Pocillopora, Porites, Psammocora, Scolymia, Seriatopora, Symphyllia, and Trachyphyllia. Of the entire genus, corals of the genus Porites were dominated by the number of juveniles as many as 36 colonies.Keywords: Molas, coral, recruitment, ScleractiniaAbstrakRekrutmen karang adalah masuknya individu karang baru pada populasi terumbu karang dikarenakan reproduksi ataupun migrasi.  Juvenil karang merupakan bentuk hasil metamorphosis dan pertumbuhan planula karang yang berukuran ≤ 5 cm dan menempel pada substrat tertentu.  Terdapat dua tipe substrat di perairan, substrat yang stabil dan substrat yang tidak stabil seperti pecahan karang (rubble).  Tujuan penelitian ini adalah untuk mempelajari tentang rekruitmen karang keras, baik dari densitas, komposisi jenis koloni juvenil karang, ukuran, hingga tipe substrat yang ditempati oleh juvenil karang.  Penelitian ini dilakukan pada bulan Agustus 2021 di perairan Molas Kecamatan Bunaken Kota Manado.  Metode yang digunakan untuk pemilihan lokasi adalah metode purposive sampling dan pengumpulan data menggunakan metode sampling dengan transek kuadran.  Hasil penelitian menunjukan bahwa densitas rekruitmen karang pada lokasi penelitian sebesar 8,43 koloni/m2.  Persentase penempelan juvenil karang pada substrat stabil sebesar 90% dan pada substrat yang tidak stabil sebesar 10%.  Ukuran rata-rata dari juvenil karang pada lokasi penelitian adalah 2,4cm.  Komposisi genus juvenil karang yang ditemukan pada lokasi penelitian adalah karang genus Acropora, Anacropora, Coeloseris, Cycloseris, Cyphastrea, Echinopora, Favites, Fungia, Galaxea, Goniastrea, Isopora, Leptastrea, Leptoseris, Lobophyllia, Merulina, Montastrea, Montipora, Oulophyllia, Pachyseris, Pavona, Platygyra, Plasiastrea, Pocillopora, Porites, Psammocora, Scolymia, Seriatopora, Symphyllia, dan Trachyphyllia.  Dari keseluruhan genus, didominasi oleh karang genus Porites dengan jumlah juvenil sebanyak 36 koloni.Kata kunci: Molas, karang, rekrutmen, scleractinia
Molecular Identification And Conservation Status Of Sharks From The Fins Trade In Manado City North Sulawesi Mopay, Maratade; Wullur, Stenly -; Onibala, Hens -; Ginting, Elvy Like; Rumengan, Inneke F. M; Sondak, Calvyn F.A; Sumilat, Deiske A.
Jurnal Ilmiah Platax Vol. 9 No. 2 (2021): ISSUE JULY-DECEMBER 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v9i2.36016

Abstract

Sharks are a group of cartilaginous fish that are vulnerable to overfishing.  Genetics approaches play an important role in shark conservation. Shark fishing has become the main activity of fishermen in several areas, including in North Sulawesi. This research is focused on the molecular aspects and conservation status of shark species obtained from the shark fin trade in Manado, North Sulawesi. COI gene was amplified using Fish BCL5 (for) and HCO219 (rev) primers. Nucleotide sequences of each sample were aligned with the closest sequences in the GenBank database using the BLAST (Basic Local Alignment and Search Tool) method. The conservation status of the shark species is carried through the IUCN (International Union for the conservation of nature red list) Red list website. Molecular identification results showed that the shark’s fins from Manado had high similarity with Carcharhinus falciformis (HM1 and HM2) and Carcharhinus melanopterus (HM3). According to IUCN red list data, the C. falciformis and C. melanopterus were categorized as vulnerable to extinction (VU).Keywords:  Molekuler; COI; Shark; Manado and IUCN Red list . AbstrakHiu merupakan kelompok ikan bertulang rawan yang sangat rentan terhadap dampak penangkapan secara berlebihan.  Informasi terkait genetik hiu  yang semakin terancam populasinya sangat berperan penting dalam upaya konservasi hiu. Penangkapan hiu telah menjadi aktivitas utama nelayan di beberapa daerah, termasuk di Sulawesi Utara. Penelitian ini difokuskan pada aspek  molekuler dan penentuan status konservasi spesies hiu menggunakan sampel sirip yang di dapatkan  dari perdagangan sirip  hiu, di kota Manado.  Amplifikasi gen COI dilakukan dengan menggunakan primer Fish BCL5 (for) dan HCO219 (rev). Sekuens nukleotida masing-masing sampel disejajarkan dengan nukleotida terdekat yang ada dalam database genbank menggunakan metode BLAST (Basic Local Aligment and Search Tool)  Penentuan status konservasi dilakukan melalui penelusuran spesies rujukan di situs IUCN (International Union for the Conservation of Nature) Red list. Hasil identifikasi molekuler menunjukan bahwa sampel sirip hiu dari  kota Manado  memiliki kemiripan yang tinggi dengan spesies : Carcharhinus falciformis  (HM1 dan HM2) dan C. melanopterus (HM3).  Menurut data IUCN Red list, C. falciformis dan C. Melanopterus merupakan jenis hiu dalam status konservasi rentan punah (VU). Kata Kunci: Molekuler; COI; hiu; Manado dan IUCN Red list

Page 26 of 49 | Total Record : 488

 24   25   26   27   28 

Filter by Year

2012 2025


Reset
Filter By Issues
All Issue Vol. 13 No. 2 (2025): ISSUE JULY-DECEMBER 2025 Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025 Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024 Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024 Vol. 11 No. 2 (2023): ISSUE JULY-DECEMBER 2023 Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023 Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022 Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022 Vol. 9 No. 2 (2021): ISSUE JULY-DECEMBER 2021 Vol. 9 No. 1 (2021): ISSUE JANUARY - JUNE 2021 Vol. 8 No. 2 (2020): ISSUE JULY-DECEMBER 2020 Vol. 8 No. 1 (2020): ISSUE JANUARY-JUNE 2020 Vol. 7 No. 2 (2019): ISSUE JULY - DECEMBER 2019 Vol. 7 No. 1 (2019): ISSUE JANUARY-JUNE 2019 Vol 7, No 1 (2019): ISSUE JANUARY-JUNE 2019 Vol. 6 No. 2 (2018): ISSUE JULY-DECEMBER 2018 Vol 6, No 1 (2018): ISSUE JANUARY-JUNE 2018 Vol 6, No 1 (2018): EDISI JANUARI-JUNI 2018 Vol. 5 No. 2 (2017): ISSUE JULY - DECEMBER 2017 Vol. 5 No. 1 (2017): ISSUE JANUARY - JUNE 2017 Vol. 4 No. 2 (2016): EDISI JULI-DESEMBER 2016 Vol. 4 No. 1 (2016): EDISI JANUARI-JUNI 2016 Vol 3, No 2 (2015): EDISI JULI - DESEMBER 2015 Vol. 3 No. 1 (2015): EDISI JANUARI-JUNI 2015 Vol. 2 No. 3 (2014): EDISI SEPTEMBER-DESEMBER 2014 Vol. 2 No. 2 (2014): EDISI MEI - AGUSTUS 2014 Vol. 2 No. 1 (2014): Edisi Januari - April 2014 Vol. 1 No. 4 (2013): Edisi September - Desember 2013 Vol. 1 No. 3 (2013): EDISI MEY - AGUSTUS 2013 Vol. 1 No. 2 (2013): EDISI JANUARI - APRIL 2013 Vol. 1 No. 1 (2012): (Edisi September - Desember 2012) More Issue