Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal JURNAL ILMIAH PLATAX
Unstain N. W. J. Rembet
Unknown Affiliation
Environmental Science

Published : 14 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 14 Documents
Search

 1   2 
Ecological-Economic Assesment Trevally Culture In North Lembeh District Of Bitung City, North Sulawesi Province Keren Wulan Lumi; Unstain N. W. J. Rembet; Suria Darwisito
Jurnal Ilmiah PLATAX Vol. 7 No. 1 (2019): ISSUE JANUARY-JUNE 2019
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.7.1.2019.22594

Abstract

This study aimed to know several water quality conditions for trevally culture, determine the culture area suitability, and inform the financial benefit of the trevally culture activity in floating net system. Determination of the trevally culture was based on physical and chemical water conditions. Results showed that water conditions in Pintu Kota was suitable for trevally culture.  Net B/C Ratio was more than one, 1.34; Positive NPV was IDR. 173,838,237,98; IRR reached 36,5%; PI was > 1, 11.61; and POT was 2.7 years, where the return period was 6 cycles at an interest rate of 0,5%. The calculations of stochastic approach got positive NPV of IDR. 202,964,498, the IRR was not less than 46,2%, the PI was > 2,7; and POT was 2,8 years at the most. There were two trevally culture groups, poparo and tude each of which consisted of 10 members. With one floating net cage system of 6 nets, the investment was economically feasible.Key words: trevally culture, floating net cage system, feasibility, suitability landABSTRAKPenelitian ini bertujuan untuk Mengetahui kondisi beberapa kualitas air untuk budidaya ikan kuwe,  Menentukan kesesuaian lahan budidaya ikan kuwe,  Menginformasikan manfaat finansial usaha budidaya ikan kuwe (Caranx sp)  sistem karamba jaring apung. Penelitian ini dilakukan di perairan Pintu Kota, dan penentuan lokasi budidaya ikan bobara dilakukan berdasarkan pengamatan kondisi perairan fisika dan kimia. Hasil penelitian menunjukkan bahwa kondisi perairan di Pintu Kota masih sesuai untuk dilakukan usaha budidaya. Hasil perhitungan analisis ekonomi diperoleh Net B/C Ratio lebih besar dari satu yakni 1,34; NPV positif yakni Rp 173,838,237,98; IRR mencapai 36,5%; PI lebih besar dari satu yakni 11,61, dan POT selama 2,7 tahun, dimana jangka waktu pengembalian investasi sebanyak 6 siklus pada tingkat suku bunga 0,5%. Perhitungan dengan pendekatan stokastik NPV diperoleh paling besar Rp 202,964,498, IRR tidak kurang dari dari 46,2%; PI paling sedikit turun menjadi 2,7 dan POT paling lama 2,8 tahun. Hanya ada dua kelompok usaha yaitu kelompok poparo dan tude yang masing-masing berjumlah 10 orang. Dengan satu paket keramba ada 6 jaring, Investasi usaha ikan kuwe dikategorikan layak secara ekonomi.Kata kunci: Budidaya Ikan Kuwe, Karamba Jaring Apung, Kelayakan Usaha, Kesesuaian Lahan
Ecological Conditions And Economic Values Of Coral Reef Flats In Mattiro Deceng Village, Badi Island, Pangkajenne Kepulauan Regency, South Sulawesi Ella Maria Tudang; Unstain N. W. J. Rembet; Adnan S Wantasen
Jurnal Ilmiah PLATAX Vol. 7 No. 1 (2019): ISSUE JANUARY-JUNE 2019
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.7.1.2019.22596

Abstract

This research was carried out in Badi Island waters on Mattiro Deceng Village, Pangkajenne Kepulauan Regency, South Sulawesi.  The aims of this study are to know the ecological conditions of the coral reef ecosystem at; and to calculate the economic value of coral reef ecosystems at the research area. To determine the ecological conditions of coral reefs, data were obtained by using the Transect Line Intercept (LIT) method which were used in 3 different locations including: inner reef, middle reef, and outer reef. All benthic biota passed through the transect were recorded based on their growth form. On the other hand, to obtain the total economic value, interviews were conducted within the community who were active in utilizing the coral reef ecosystem by using the purposive sampling method. The condition of the coral reef of Badi Island on inner reef area (48.62%) was considered in the medium category and for the middle reef area is 64.10% and the outer reef area is 50.01% were both considered in the good category. The total economic value of Badi Island's coral reef ecosystem in Mattiro Deceng Village is Rp. 10,567,286,000 / year, whereas for the direct benefit calculated value is Rp. 9,213,714,286 / year and for the value of indirect benefits is totaling Rp. 1,353,572,000/year.Keywords: Ecological Conditions, Economic Value, Coral ReefsABSTRAKPenelitian ini dilakukan di Perairan Pulau Badi Desa Mattiro Deceng Kabupaten Pangkajenne Kepulauan, Sulawesi Selatan dengan tujuan untuk: 1. Mengetahui kondisi ekologi ekosistem terumbu karang pada lokasi penelitian. 2.  Mengetahui nilai ekonomi ekosistem terumbu karang pada lokasi penelitian. Untuk menentukan kondisi ekologi terumbu karang akan di peroleh dengan menggunakan metode Line Intercept Transek (LIT) pada 3 lokasi berbeda yaitu inner reef, middle reef, dan outer reef, dimana setiap biota bentik yang dilewati transek akan dicatat menurut bentuk pertumbuhannya. Sedangkan untuk memperoleh nilai ekonomi total dilakukan wawancara kepada masyarakat yang beraktivitas di ekosistem terumbu karang dengan menggunakan metode Purposive Sampling. Kondisi terumbu karang Pulau Badi pada inner reef (48,62%) termasuk dalam kategori sedang dan pada  middle reef ( 64,10%) dan outer reef (50,01%) termasuk dalam kategori baik.  Nilai total ekonomi ekosistem terumbu karang Pulau Badi Desa Mattiro Deceng sebesar Rp. 10.567.286.000/tahun, dimana untuk nilai manfaat langsung sebesar Rp. 9.213.714.286/tahun  untuk nilai manfaat tidak langsung sebesar Rp. 1.353.572.000/tahun.Kata Kunci : Kondisi Ekologi, Nilai Ekonomi, Terumbu Karang
Profil Ekosistem Mangrove Di Desa BAHOI Kabupaten Minahasa Utara (Profile of Mangrove Ecosystem in Bahoi Village North Minahasa Regency) Audy M. H. Dien; Unstain N. W. J. Rembet; Adnan S. Wantasen
Jurnal Ilmiah PLATAX Vol. 4 No. 1 (2016): EDISI JANUARI-JUNI 2016
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.4.1.2016.12461

Abstract

This study was carried out in mangrove forest of Bahoi, Likupang district, North Minahasa regency. It was aimed at knowing the ecological condition of the mangrove forest. Study stations were selected by determining representatives from each zonation and site condition. Results showed that mangrove species in Bahoi was dominated by Rhizophora mucronata, R. apiculata, Bruguiera gymnorrhiza, B. cylindrical, and Sonneratia alba, with the highest density in station 1 shown by Rhizophora apiculata, 0.65 ind/m2, then station 2 and 3 by  R. Mucronata, 0.93 and 0,63 ind/m2, respectively.  The highest total density was recorded in station 2, 1.85 ind/40 m2, then station 1, 1.78 ind/40 m2, and station 3, 1.35 ind/40 m2, respectively. As conclusion, the ecological condition of mangrove ecosystem in Bahoi was categorized as good, and aware to be beneficial for the local community in ecological function as abrasion prevention and living environment of the aquatic biota and in economic function from ecotourism aspect, so that it was right to be managed in the form of ecotourism management. Keywords : Mangrove,  Profile, Bahoi Village ABSTRAK Penelitian ini dilaksanakan di kawasan mangrove desa Bahoi, Kecamatan Likupang, Kabupaten Minahasa Utara.  Tujuan penelitian, untuk mengetahui kondisi ekologis ekosistem mangrove. Penentuan lokasi stasiun pengamatan dilakukan dengan menentukan perwakilan dari setiap zonasi dan kondisi lokasi sampling. Hasil penelitian menunjukkan bahwa komposisi jenis mangrove di desa Bahoi didominasi oleh Rhizophora mucronata, R. apiculata, Bruguiera gymnorrhiza, B. cylindrical, dan Sonneratia alba, dengan kerapatan jenis tertinggi di stasiun 1 diperlihatkan oleh  Rhizophora apiculata (0,65 ind/m2), kemudian pada stasiun 2 dan 3 oleh  R. mucronata (0,93; 0,63 ind/m2).  Kerapatan total tertinggi ditemukan pada stasiun 2, 1.85 ind/40 m2, diikuti oleh stasiun 1 (1.78 ind/40 m2), dan stasiun 3 (1.35 ind/40 m2). Sebagai kesimpulan, kondisi ekologi ekosistem mangrove di Desa Bahoi dikategorikan baik, dan  disadari bermanfaat bagi masyarakat dalam fungsi ekologis sebagai pencegah abrasi dan  tempat hidup biota perairan, serta fungsi ekonomisnya dalam aspek ekowisata, sehingga tepat untuk dikelola dengan bentuk pengelolaan ekowisata.   1 Staf Dinas Kelautan dan Perikanan Provinsi Sulawesi Utara 2 Staf Pengajar Fakultas Perikanan dan Ilmu Kelautan Unsrat
Echinoderms Community in Mokupa Beach Waters, Sub-district of Tombariri, Minahasa Regency Andrea G Kambey; Unstain N. W. J. Rembet; Adnan S. Wantasen
Jurnal Ilmiah PLATAX Vol. 3 No. 1 (2015): EDISI JANUARI-JUNI 2015
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.3.1.2015.13212

Abstract

Echinoderms community of intertidal zone in Tasik Ria beach, Mokupa village, Tombariri Sub-district, Minahasa Regency was studied to reveal its structure. Methods implemented to study the community were density, relative density, diversity, dominance and evenness focusing on echinoderms species. Those methods including species abundance and diversity introduced by Shannon-Wiener (‘H). Results from 10 species identified with total of 193 individuals were recorded in the study.  In general, the result showed that the area still has good condition as a habitat for echinoderm communities.   Keywords: Community, diversity, dominance   A B S T R A K   Komunitas Echinodermata di zona intertidal rataan terumbu di daerah Tasik Ria Desa Mokupa Kecamatan Tombariri, Kabupaten Minahasa, Provinsi Sulawesi Utara, dianalisis untuk memahami struktur komunitas organisme Echinodermata, menggunakan analisis tentang kepadatan, kepadatan relatif,  keanekaragaman, dominasi, dan kemerataan spesies.  Penelitian ini difokuskan pada kelimpahan dan keragaman spesies termasuk keragaman Shannon-Wiener spesies (H') masing-masing. Hasilnya mencatat 10 spesies dan total 193 individu. Secara umum, menunjukan daerah tersebut memiliki  kondisi yang masih stabil sebagai tempat hidup komunitas echinodermata.   Kata Kunci : Komunitas, keanekaragaman, dominasi 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi
Profile of Mangrove Ecosystem in Bahoi Village North Minahasa Regency Audy M. H. Dien; Unstain N. W. J. Rembet; Adnan S. Wantasen
Jurnal Ilmiah PLATAX Vol. 4 No. 1 (2016): EDISI JANUARI-JUNI 2016
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.4.1.2016.13227

Abstract

This study was carried out in mangrove forest of Bahoi, Likupang district, North Minahasa regency. It was aimed at knowing the ecological condition of the mangrove forest. Study stations were selected by determining representatives from each zonation and site condition. Results showed that mangrove species in Bahoi was dominated by Rhizophora mucronata, R. apiculata, Bruguiera gymnorrhiza, B. cylindrical, and Sonneratia alba, with the highest density in station 1 shown by Rhizophora apiculata, 0.65 ind/m2, then station 2 and 3 by  R. Mucronata, 0.93 and 0,63 ind/m2, respectively.  The highest total density was recorded in station 2, 1.85 ind/40 m2, then station 1, 1.78 ind/40 m2, and station 3, 1.35 ind/40 m2, respectively. As conclusion, the ecological condition of mangrove ecosystem in Bahoi was categorized as good, and aware to be beneficial for the local community in ecological function as abrasion prevention and living environment of the aquatic biota and in economic function from ecotourism aspect, so that it was right to be managed in the form of ecotourism management. Keywords : Mangrove,  Profile, Bahoi Village ABSTRAK Penelitian ini dilaksanakan di kawasan mangrove desa Bahoi, Kecamatan Likupang, Kabupaten Minahasa Utara.  Tujuan penelitian, untuk mengetahui kondisi ekologis ekosistem mangrove. Penentuan lokasi stasiun pengamatan dilakukan dengan menentukan perwakilan dari setiap zonasi dan kondisi lokasi sampling. Hasil penelitian menunjukkan bahwa komposisi jenis mangrove di desa Bahoi didominasi oleh Rhizophora mucronata, R. apiculata, Bruguiera gymnorrhiza, B. cylindrical, dan Sonneratia alba, dengan kerapatan jenis tertinggi di stasiun 1 diperlihatkan oleh  Rhizophora apiculata (0,65 ind/m2), kemudian pada stasiun 2 dan 3 oleh  R. mucronata (0,93; 0,63 ind/m2).  Kerapatan total tertinggi ditemukan pada stasiun 2, 1.85 ind/40 m2, diikuti oleh stasiun 1 (1.78 ind/40 m2), dan stasiun 3 (1.35 ind/40 m2). Sebagai kesimpulan, kondisi ekologi ekosistem mangrove di Desa Bahoi dikategorikan baik, dan  disadari bermanfaat bagi masyarakat dalam fungsi ekologis sebagai pencegah abrasi dan  tempat hidup biota perairan, serta fungsi ekonomisnya dalam aspek ekowisata, sehingga tepat untuk dikelola dengan bentuk pengelolaan ekowisata.   1 Staf Dinas Kelautan dan Perikanan Provinsi Sulawesi Utara 2 Staf Pengajar Fakultas Perikanan dan Ilmu Kelautan Unsrat
Distribution of Coral Reefs Stone at the Reef Flat of South Coast Putus-Putus Island East Ratatotok, Ratatotok District Southeast Minahasa Regency Ariyanti Halidu; Laurentius T. X. Lalamentik; Unstain N. W. J. Rembet
Jurnal Ilmiah PLATAX Vol. 4 No. 1 (2016): EDISI JANUARI-JUNI 2016
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.4.1.2016.13229

Abstract

This research was conducted at the reef flat of south Putus-Putus Island, East Ratatotok, Ratatotok district, Southeast Minahasa Regency. This research was done no data of coral distribution available in Putus-Putus Island. This research aimed to describe the distribution of corals in Putus-Putus Island. The benefit of the study was to provide information and contribution to coral reef management efforts in the region. Data was collected using transect-quadrat methodt. There were 3 sampling points determined, the inner reef flats, the middle reef flats, and the outer reef flat. Each depth was laid five 50 m–transects, and each transect had 10 1x1-quadrats. The distance between quadrats was 5 m. Any coral found in the quadrat was recorded on a data sheet and photographed using an underwater camera. The highest percent cover was recorded at the outer reef flat, 57.32%, followed by the middle reef flat, 39.08%, and the lowest was found in the inner reef flat, 11.38%. The most coral lifeform cover in Putus-Putus Island reef flat was Coral Massive, 42.98%. General condition of coral reefs was good at the outer reef flat, moderate at the middle reef flat, and poor at the inner reef flat, respectively. Hard coral diversity index (H’) value was 0.36 at the inner reef flat, 0.56 at the middle reef flat, and 0.51 at the outer reef flat. Eveness index was 0.52 at the inner reef flats, 0.59 at the middle reef flat and 0.60 at the outer reef flat, respectively. Dominance index was 0.61 at the inner reef flat, 0.43 at the middle reef flat, and 0.45 at the outer reef flat. The distribution pattern was clustered in all sampling points. Keyword : Distribution, Coral Abstrak Penelitian ini dilaksanakan di pantai selatan Pulau Putus-Putus Desa Ratatotok Timur Kecamatan Ratatotok Kabupaten Minahasa Tenggara. Penelitian ini dilakukan karena belum ada data distribusi karang batu di rataan terumbu Pulau Putus-Putus. Penelitian ini bertujuan untuk mengetahui distribusi karang batu di rataan terumbu Pulau Putus-Putus. Manfaat penelitian yaitu dapat menjadi sumber informasi dan mampu memberikan kontribusi bagi upaya pengelolaan terumbu karang di wilayah Ratatotok di masa yang akan datang. Pengambilan data dilakukan dengan menggunakan metode transek kuadran. Pada lokasi penelitian, ditentukan tiga titik pengambilan data, yaitu kedalaman inner reef flat, middle reef flat dan outer reef flat. Pada setiap kedalaman diletakkan 5 transek ulangan, dengan panjang 50 meter, pada setiap transek diletakkan 10 buah kuadran berukuran 1x1 meter dengan jarak antar kuadran  adalah 5 meter. Setiap karang yang ditemukan dalam kuadran dicatat pada data sheet dan mengambil gambar dengancamera underwater. Persentase tutupan karang batu tertinggi diperoleh pada kedalaman outer reef flat yaitu sebesar 57,32 % diikuti dengan middle reef flat 39,08 % dan tutupan terendah pada kedalaman inner reef flat yaitu 11,38 %. Bentuk pertumbuhan karang batu yang paling banyak menutupi rataan terumbu Pulau Putus-Putus adalah Coral massive sebesar 42,98%. Secara umum kondisi terumbu karang pada kedalaman outer reef flat dikategorikan baik, kedalaman middle reef flat dikategorikan cukup dan kedalaan inner reef flat dikategorikan rusak/buruk. Dari hasil analisis, nilai indeks keanekaragaman karang batu di tiap kedalaman sebagai berikut: kedalaman inner reef flat (H' = 0,36), kedalaman middle reef flat (H' = 0,56) dan kedalaman outer reef flat (0,51). Hasil indeks kesamarataan untuk tiap kedalaman adalah kedalaman inner reef flat (e = 0,52), kedalaman middle reef flat (e = 0,59) dan outer reef flat (e = 0,60). Nilai indeks dominasi pada kedalaman inner reef flat tergolong dalam kriteria dominasi sedang 0,61 dan kedalaman middle reef flat dan outer reef flat dominasi rendah 0,43 – 0,45. Pola distribusi karang batu pada ketiga kedalaman adalah mengelompok. 1Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi
Community of starfish in the coastal area of Mokupa Village, sub-district of Tombariri, Minahasa district, North Sulawesi Utara Syanet C.S Umboh; Unstain N. W. J. Rembet; Anneke V. Lohoo
Jurnal Ilmiah PLATAX Vol. 4 No. 1 (2016): EDISI JANUARI-JUNI 2016
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.4.1.2016.13502

Abstract

This study was carried out in the coastal waters of Mokupa, Tombariri District,  Minahasa Regency, North Sulawesi Province. It was aimed to know the sea star community. The study was beneficial as information source of the sea star. Data collection employed a quadrat-transect method in new moon and full moon. There were 3 sampling points randomly selected. Each transect was placed  10 1x1 m quadrats along 100 m-transect seaward. The species found were Protoreaster nodosus, Linckia laevigata, Archaster typicus, Culcita novaeguineae, Pentaster obtusatus. Higher mean number was found in new moon than in full moon. The dominant species in Mokupa waters was Protoreaster nodosus. Keywords : Starfish, community, Mokupa Abstrak Penelitian ini dilaksanakan di perairan pantai Desa Mokupa Kecamatan Tombariri Kabupaten Minahasa Provinsi Sulawesi Utara. Penelitian ini bertujuan untuk mengetahui komunitas bintang laut. Penelitian ini bermanfaat sebagai sumber informasi tentang bintang laut. Pengambilan data dilakukan dengan menggunakan metode transek-kuadran pada bulan baru dan bulan purnama. Setiap transek diletakan 10 buah kuadran dengan ukuran 1x1 meter sepanjang 100 m transek ke arah laut. Jenis bintang laut yang ditemukan yaitu Protoreaster nodosus, Linckia laevigata, Archaster typicus, Culcita novaeguineae, Pentaster obtusatus. Jumlah rata-rata individu bintang laut di bulan baru lebih banyak dari pada bintang laut dibulan purnama. Jenis bintang laut yang dominan diperairan pantai Desa Mokupa yaitu Protoreaster nodosus. 2,3 Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi
Reef Fishes Colonization Rate Around Artificial Reef in Putus-putus Island, South-East Minahasa District Laurentius T. X. Lalamentik; Unstain N. W. J. Rembet; Adnan S. Wantasen
Jurnal Ilmiah PLATAX Vol. 5 No. 1 (2017): ISSUE JANUARY - JUNE 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.5.1.2017.14969

Abstract

A comprehensive research effort was directed to increase the ecological role of Putus-Putus island coral reefs. This study was an implementation of artificial reef technology as fish colonization locality. The artificial reefs were made of 20x20x100 cm-concrete blocks placed in 6 levels and located at the depth of 8-10 m. Reef fish observations were done three times in two locations. Environmental parameters, such as temperature, salinity and visibility, were also measured. Environmental parameters (temperature, salinity a. Water temperature (29.65oC and 29.64oC) supported the coral growth as well. Salinity distribution  was not significantly different among the study sites.  This study also found 37 reef fish species belonging to 18 families. Number of species varied with observed time and localities. Total number of individuals increased with number of fish species. Mean number of individuals and species of reef fish in locality B were higher than those in locality A. Moreover, the reef fish colonization rate in the study site followed the model y = 4.3801e0.5249x with R2= 0.9297 in the strait and y = 5.0397e0.5493x  with R2= 0.9297 for the Bay. Keywords: Artificial reefs, reef fish. Abstrak Suatu upaya penelitian yang komprehensif diarahkan untuk peningkatan fungsi ekologi terumbu karang Pulau Putus-Putus. Penelitian ini berupa penerapan teknologi terumbu buatan sebagai tempat hunian ikan. Terumbu buatan terbuat dari balok cor beton berukuran 20x20x100 cm bersusun 6 dan ditempatkan pada kedalaman 8-10 m. Pengamatan ikan karang dilakukan 3 kali di 2 lokasi berbeda. Parameter lingkungan, seperti suhu, salinitas, dan kecerahan, juga diukur.    Hasil pengukuran yang diperoleh (29,65 oC dan 29,64 oC) termasuk suhu yang optimal untuk pertumbuhan karang. Dari hasil penelitian, ditemukan 37 spesies yang masuk dalam 18 famili ikan karang. Jumlah spesies yang ditemukan bervariasi pada setiap waktu dan lokasi pengamatan. Pengambilan spesies ikan karang dilakukan pada 2 lokasi dengan masing-masing lokasi dilakukan 3 kali pengambilan sampel. Berdasarkan hasil yang diperoleh (tabel 03) dapat dilihat bahwa jumlah individu bertambah seiring dengan banyaknya jumlah spesies ikan karang yang didapat. Rata-rata jumlah individu dan jumlah spesies ikan karang pada lokasi B lebih banyak. Laju hunian ikan karang di lokasi penelitian mengikuti model y = 4.3801e0.5249x dengan R2= 0,9297 untuk lokasi Selat dan y = 5.0397e0.5493x  dengan R2= 0,9297 untuk lokasi Teluk. Kata kunci : Terumbu buatan, ikan karang
Vertical Distribution Of Hard Corals In Southern Siladen Island John L. Tombokan; Unstain N. W. J. Rembet; Silvester B. Pratasik
Jurnal Ilmiah PLATAX Vol. 5 No. 1 (2017): ISSUE JANUARY - JUNE 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.5.1.2017.14972

Abstract

This study was aimed at provide information on hard coral distribution in southern Siladen Island. The work was done using SCUBA gear Line Intercept Transect (LIT). Thirty m long-line transects were placed at the reef flat, 5 m depth, 10 m depth, 15 m depth, and 20 m depth. A total of 44 hard coral genera was recorded, and the highest number of genre was found at 5 m depth. Coral species diversity was also high enough at the reef flat (1.032) and 5 m depth (1.28). Coral reef condition at 10 m depth was good enough as well and categorized as productive due to much higher percent of the biotic component than the abiotic component. The dominant life forms consisted of tabulate Acropora and branching corals at the reef flat, encrusting corals, branching corals, and foliose corals at 5 m, encrusting corals at 10 and 20 m depth, and massive corals, encrusting corals, and branching corals at 15 m depth, respectively. Keywords: coral reef, distribution, LIT, vertical zonationl.   Abstrak Penelitian ini bertujuan untuk menyediakan informasi tentang distribusi karang batu di sebelah selatan pulau Siladen. Penelitian ini dilakukan menggunakan alat selam SCUBA dan metode transek intersep garis. Tali transek sepanjang 30 m diletakkan di rataan terumbu, kedalaman 5, 10, 15, dan 20 m. Total 44 genera karang batu ditemukan pada penelitian ini, dan jumlah genera terbanyak ditemukan pada kedalaman 5 m. Keanekaragaman spesies karang juga cukup tinggi di daerah rataan terumbu (1,032) and 5m (1,28). Kondisi terumbu karang pada kedalaman 10 m juga cukup baik dan dikategorikan produktif karena tingginya komponen biotik dibandingkan dengan komponen abiotik. Bentuk pertumbuhan yang dominan masing-masing terdiri dari Acropora meja dan karang bercabang di rataan terumbu karang, karang encrusting, karang bercabang, dan foliose pada kedalaman 5 m, karang encrusting pada kedalaman 10 dan 20m, serta karang masif, karang encrusting dan karang bercabang pada kedalaman 15m.   Kata kunci: Terumbu karang, distribusi, Transek Intersep Garis, Zonasi vertikal.
Distribution of Pocillopora verrucosa (Ellis dan Solander, 1786) at the Reef Flat of South Coast Putus-Putus Island East Ratatotok, Ratatotok District Southeast Minahasa Regency Jesika Haryati Nasaru; Laurentius T. X. Lalamentik; Unstain N. W. J. Rembet
Jurnal Ilmiah PLATAX Vol. 5 No. 1 (2017): ISSUE JANUARY - JUNE 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.5.1.2017.15152

Abstract

This research was conducted at the reef flat of south Putus-Putus Island, East Ratatotok, Ratatotok district, Southeast Minahasa Regency. The study aims to identify the distribution of P. verrucosa reefs in the reef flat area of Putus-Putus Island. This research is able to be utilized as an informations resource, and also able to contribute an effort in order to manage the coral reefs in the Ratatotok area in the near future. The sample is obtained with using simple random method, which collects the data randomly as the sample collecting system by drawing way or by using random number table. The random number table contains with some amount of numbers which is formed with coloumn and rows, and the drawing is done freely.  There was three point of study site determined, and geographical location of every site was noted, the north and east latitude. In every point of the site was put quadrant with 10 x 10 m, where every quadrant is divided into 100 quadrants with 1 x 1 m sized. The every 1 x 1m quadrant was made grid with 10 x 10m (100 grids for every quadrant). The percentage of the reef’s cover at the first station is (0,28%), the second station (1,4%). and the third station (1,41%). Based on the study’s result, the highest reef’s cover percentage is in the third station (1,41%) which is located further from the strait, whereas the lowest reef’s cover percentage is in the first station (0,28%) located near the strait. The distribution scheme of P.verrucosa from the three stations are grouping (Id> 1). There is no noticeable diffrences from the three location for the cover percentage, the diameter and the distribution scheme. The ANOVA test showed that the amount of the colony : Hhit (1.25) < Ftah (3.10) the H0 was accepted, where there was no noticeable differences from the amount of the colony in the three stations. The diameter : Fhit (1.40) < Ftab (3.10)  means H0 accepted, and there was no noticeable differences in the diameters. The percentage of the cover : where Fhit (0.71) < Ftab (3.10 ) means H0 accepted, and there was no noticeable differences in the diameters of the three stations. Keyword : Distribution, Coral P. verrucosa Penelitian ini dilaksanakan di pantai selatan Pulau Putus-Putus Desa Ratatotok Timur Kecamatan Ratatotok Kabupaten Minahasa Tenggara. Penelitian ini dilakukan untuk mengetahui distribusi karang P.verrucosa di rataan terumbu Pulau Putus-Putus. Tujuan penelitian yaitu mengetahui distribusi karang P.verrucosa di rataan terumbu Pulau Putus-Putus. Manfaat penelitian yaitu dapat menjadi sumber informasi dan mampu memberikan kontribusi bagi upaya pengelolaan terumbu karang di wilayah Ratatotok di masa yang akan datang. Pengambilan data dilakukan dengan menggunakan metode pengambilan acak sederhana. Pengambilan acak sederhana merupakan sistem pengambilan sampel secara acak dengan menggunakan undian atau tabel angka random  Tabel angka random merupakan tabel yang dibuat dan berisi angka-angka yang terdiri dari kolom dan baris, dan cara pemilihannya dilakukan secara bebas.  Pada lokasi penelitian ditentukan 3 titik pengambilan data, yang setiap titik dicatat posisi geografisnya, (lintang utara dan bujur timur). Pada setiap titik akan diletakan kuadran berukuran 10 x 10m, di mana pada masing masing kuadran tersebut dibagi menjadi 100 kuadran berukuran 1 x 1m. Pada setiap kuadran 1 x 1m dibuat grid berukuran  10 x 10 cm ( terdapat 100 grid setiap kuadran ). Persentase tutupan karang P. verrucosa Pada stasiun pertama (0,28 %), Stasiun kedua (1,4%), dan Stasiun ketiga (1,41%). Berdasarkan dari hasil yang di dapat bahwa persentasi tutupan karang tertinggi pada stasiun ke tiga yang jauh dari selat (1,41 %) sedangkan tutupan terendah yaitu stasiun pertama dekat dengan selat (0,28 %). Pola distribusi karang P. verrucosa pada ketiga stasiun adalah mengelompok (Id> 1). Pada ketiga stasiun ini tidak terdapat perbedaan nyata dalam hal Persentase tutupan, diameter dan pola distribusi. Dari uji ANOVA Jumlah koloni: dimana Fhit (1.25) < Ftab (3.10) artinya Ho diterima, bahwa tidak ada perbedaan nyata jumlah koloni pada ketiga stasiun tersebut. Jumlah Diameter: dimana Fhit (1) < Ftab (3.10) artinya Ho diterima, bahwa tidak ada perbedaan nyata dalam hal jumlah diameter. Jumlah Persentase tutupan: dimana Fhit (1.17) < Ftab (3.10 ) artinya Ho diterima,bahwa tidak ada perbedaan nyata jumlah diameter pada ketiga stasiun tersebut.
Co-Authors Adnan S Wantasen Adnan S. Wantasen Andrea G Kambey Anneke V. Lohoo Ariyanti Halidu Audy M. H. Dien Ella Maria Tudang Jesika Haryati Nasaru John L. Tombokan Joudy R.R. Sangari Keren Wulan Lumi Laurentius T. X. Lalamentik Lawrence J. L. Lumingas Muhammad Yusran Boynauw Mustika Permata Sari Ridwan Lasabuda Ruddy D. Moningkey Silvester B. Pratasik Suria Darwisito Syanet C.S Umboh Yusuf Suleman