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All Journal JURNAL ILMIAH PLATAX
Mamangkey, Noldy G.F
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Environmental Science

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Hard Coral Cover and Coral Fish Density in Pantai Pall Waters,Tanjung Pulisan, East Likupang, North Minahasa Regency Maxs, Marten; Manembu, Indri S.; Mamangkey, Noldy G. F.; Boneka, Farnis; Manengkey, Hermanto W. K.; Manopo, Victoria E. N.
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.9.2.2021.35331

Abstract

Tanjung Pulisan area in Likupang has been designated as part of the Likupang Special Economic Zone (SEZ), as one of five super-priority tourist destinations. To support this program, it is urgent to have an assessment based on coral reef and fish ecology that can be destined as a tourism target. Thus, the purpose of this study is to provide information on the percentage of hard coral cover, the percentage of hard coral genera, as well as the density of reef fish in the waters of Tanjung Pulisan. The author uses the Line Intercept Transect and Underwater Visual Census methods at three stations which are combined synergistically to obtain data on corals and target reef fish effectively. Data were analyzed using the Microsoft Excel program. The results of the analysis showed that the percentage of live coral cover in Tanjung Pulisan waters was categorized as moderate with an average percentage of 47.04%, consisting of 30.28% hard coral and 16.76% soft coral. In these waters, 32 genera of hard corals were found, and Porites as the most dominant genus, with an average percentage of 23.01 %. In addition, the total average density of target reef fish in this location was 0.185 ind/m2, with the most dominant family being Acanthuridae with an average density value of 0.096 ind/m2.Keywords: Hard coral; Likupang; Reef fish; Tanjung PulisanAbstrakKawasan Tanjung Pulisan, Likupang telah ditetapkan menjadi bagian dari Kawasan Ekonomi Khusus (KEK) Likupang, satu dari lima destinasi wisata super prioritas. Guna menunjang program ini, perlu dilakukan analisis berbasis ekologi karang dan ikan karang yang bisa dijadikan sebagai target wisata. Berdasarkan ini maka dilakukan riset tutupan karang keras, persentase genera karang keras, juga kepadatan ikan karang di lokasi tersebut. Metode yang digunakan adalah Line Intercept Transect dan Sensus Visual Bawah Air pada tiga stasiun yang dipadukan secara sinergis untuk memperoleh data karang dan ikan karang target secara efektif. Data dianalisis menggunakan program Microsoft Excel. Hasil analisis menunjukan bahwa persentase tutupan karang hidup di perairan Tanjung Pulisan terkategorikan sedang dengan persentase rata-rata sebesar 47,04 %, yang terdiri dari 30,28 % karang keras dan 16,76 % karang lunak. Di perairan ini ditemukan 32 genera karang keras, dengan genus yang paling dominan yaitu Porites dengan persentase rata-rata sebesar 23,01 %. Selain itu, total kepadatan rata-rata ikan karang target di lokasi ini adalah 0,185 ind/m2, dengan Famili yang paling dominan adalah Acanthuridae dengan nilai kepadatan rata-rata sebesar 0,096 ind/m2.Kata kunci:   Ikan karang; Karang keras; Likupang; Tanjung Pulisan
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
Polychaeta Communities in Subtidal Zone Soft Substrate of Manado Bay, North Sulawesi Lumingas, Aaron R. T.; Boneka, Farnis B.; Ompi, Medy; Mamangkey, Noldy G. F.; Manembu, Indri S.; Undap, Suzanne L.; Lumingas, Lawrence J. L.
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.v10i1.39518

Abstract

This study aims to analyze the structure of the Polychaeta community on the soft substrate of the subtidal zone in Manado Bay. Samples were taken by grab at 3 stations namely ST1 located at a depth of 8 m with black mud substrate; ST2 is located at a depth of 26 m with blackish sand substrate, and ST3 are located at a depth of 18 m with blackish sand as a substrate. From the three sampling stations, 27 species of 253 Polychaeta individuals were identified. Station 1, which is located near the mouth of the Bailang River, has high individual abundance but low species diversity. Station 2, which is located near the Megamas area, has moderate individual abundance but high species richness. Station 3, which is located around the Faculty of Medicine, Unsrat Malalayang, has low individual abundance but high species richness. Substrate types and anthropogenic disturbances such as enrichment of organic matter are thought to be determinants of individual abundance, composition, and species richness of Polychaeta in Manado Bay.Keywords: Polychaeta; biodiversity; soft substrate; Manado BayAbstrak Penelitian ini bertujuan untuk menganalisis struktur komunitas Polychaeta pada substrat lunak zona subtidal di Teluk Manado. Sampel diambil dengan grab pada 3 stasiun yakni ST1 terletak pada kedalaman 8 m dengan substrat lumpur berwarna hitam; ST2 terletak pada kedalaman 26 m dengan substrat pasir berwarna kehitaman; dan ST3 terletak pada kedalaman 18 m dengan substrat pasir berwarna kehitaman. Dari tiga stasiun sampling tersebut berhasil diidentifikasi 27 spesies dari 253 individu Polychaeta. Stasiun 1 yang terletak dekat muara Sungai Bailang memiliki kelimpahan individu tinggi tetapi keanekaragaman spesies rendah. Stasiun 2 yang terletak dekat kawasan Megamas memiliki kelimpahan individu sedang tetapi kekayaan spesies tinggi. Stasiun 3 yang terletak di sekitar pemukiman belakang Fakultas Kedokteran Unsrat Malalayang memiliki kelimpahan individu rendah tetapi kekayaan spesies tinggi. Jenis substrat dan gangguan antropogenik seperti pengayaan bahan organik diduga merupakan faktor penentu kelimpahan individu, komposisi dan kekayaan spesies Polychaeta di Teluk Manado. Kata Kunci: Polychaeta; keanekaragaman hayati; substrat lunak; Teluk Manado
Length Increase and Survival Rate of Coral Isopora palifera which Transplanted on Concrete Block Roeroe, Wailan; Roeroe, Kakaskasen Andreas; Tilaar, Sandra O.; Manembu, Indri Shelovita; Mamangkey, Noldy G. F.; Schaduw, Joshian N. W.
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.51045

Abstract

Efforts to mitigate damage to coral reef ecosystems can be made by developing techniques for coral transplantation. The purpose is to know the survival rate of coral Isopora palifera and Measure the length increase of coral Isopora palifera using the Image-J application as the measurement. The research method was that artificial blocks made of concrete were used as containers for the installation of 27 colonies of coral Isopora palifera. Data collection in the field in the form of colonies that were successfully transplanted to artificial reef units will be explored using a camera from each concrete block which will take perpendicular pictures and colony portraits from each artificial reef unit. The results are then analyzed using the Image-J application. The transplantation results survival rate in Isopora palifera coral colonies in Paputungan village is 66.6% of 100%, while the Isopora palifera coral colony increase length was around 1.51 mm/5 months or 0.302 mm/month. Keywords: Coral, Isopora palifera, Transplant, Concrete block, North Sulawesi Abstrak Upaya penanggulangan kerusakan ekosistem terumbu karang dapat dilakukan dengan menggembangkan teknik transplantasi karang. Tujuan adalah Mengetahui tingkat ketahanan hidup karang Isopora palifera dan Mengetahui laju pertambahan karang Isopora palifera dengan menggunakan aplikasi Image-J sebagai pengukuran pertumbuhan. Metode penelitian yaitu balok buatan dari beton dijadikan wadah tempat pemasangan karang Isopora palifera sebanyak 27 koloni. Pengambilan data di lapangan berupa koloni yang berhasil ditransplantasi ke unit terumbu buatan akan didokumentasikan menggunakan kamera dari tiap-tiap balok diambil gambar tegak lurus dan memotret koloni dari masing-masing unit terumbu buatan.  Hasil pemotretan tersebut selanjutnya dianalisa menggunakan aplikasi Image-J. Proses transplantasi di desa Paputungan menghasilkan 66,6% dari 100% tingkat kelangsungan hidup pada koloni karang Isopora palifera, sedangkan untuk laju pertabahan koloni karang Isopora palifera berada disekitar 1,51 mm/5 bulan atau 0,302 mm/bln. Kata Kunci: Karang, Isopora palifera, Transplantasi, Balok beton, Sulawesi Utara.
Adaptation Strategies of Traditional Handline Fishermen to Coastal Reclamation in Sario District Makaluas, Marselino M.; Manoppo, Victoria; Mamangkey, Noldy G. F.; Luasunaung, Alfret; Mandagi, Ixchel F.; Malalantang, Sjenny S.; Sumilat, Deiske A.
Jurnal Ilmiah PLATAX Vol. 13 No. 2 (2025): ISSUE JULY-DECEMBER 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i2.65929

Abstract

Coastal reclamation in Sario District since 1995 has affected the socioeconomic conditions of coastal communities, particularly handline fishermen. This study aims to identify the socioeconomic conditions of fishermen, analyze internal and external factors using PESTEL and SWOT analyses, and determine appropriate adaptation strategies. The research was conducted from August to November 2025 in three villages within Sario District using a descriptive qualitative and quantitative approach. Results show that fishermen are mostly of productive age with low education levels. Declining income due to distant fishing grounds has driven diversification into side jobs. The PESTEL analysis revealed impacts of reclamation, rising costs, and weak marketing, while SWOT placed fishermen in an aggressive strategy position with strong internal capacity but serious external threats. Adaptive strategies involve pursuing side jobs while preserving traditional fishing livelihoods. Keywords: adaptation strategy; traditional fishermen; coastal reclamation; handline fishing; PESTEL analysis; SWOT analysis Abstrak Reklamasi pantai di Kecamatan Sario sejak 1995 berdampak pada kondisi sosial ekonomi masyarakat pesisir, terutama nelayan pancing ulur. Penelitian ini bertujuan mengidentifikasi kondisi sosial ekonomi nelayan, menganalisis faktor internal dan eksternal menggunakan PESTEL dan SWOT, serta menentukan strategi adaptasi yang tepat. Penelitian dilakukan selama Agustus–November 2025 di tiga kelurahan di Kecamatan Sario dengan pendekatan deskriptif kualitatif dan kuantitatif. Hasil menunjukkan nelayan didominasi usia produktif dan berpendidikan rendah. Penurunan pendapatan akibat jauhnya area tangkap mendorong diversifikasi pekerjaan. Analisis PESTEL mengungkap dampak reklamasi, biaya tinggi, dan lemahnya pemasaran, sementara SWOT menempatkan nelayan pada strategi agresif dengan kekuatan internal baik namun menghadapi ancaman eksternal. Strategi adaptasi dilakukan melalui pekerjaan sampingan tanpa meninggalkan profesi tradisional. Kata kunci: strategi adaptasi; nelayan tradisional; reklamasi pantai; pancing ulur; analisis PESTEL; analisis SWOT
Co-Authors Alex D. Kambey Alfret Luasunaung Daryanto, Adityas Andrew Deiske Adeliene Sumilat, Deiske Adeliene Farnis B. Boneka Farnis Boneka Hermanto W. K. Manengkey Indri Manembu Ixchel F Mandagi Joshian N.W. Schaduw Lawrence J. L. Lumingas Lumingas, Aaron R. T. Makaluas, Marselino M. Malalantang, Sjenny S. Manopo, Victoria E. N. Maxs, Marten Medy Ompi Paulus, James Razak, Abd Rimper, Joice RTSL Roeroe, Kakaskasen Andreas Roeroe, Wailan Sandra Tilaar Sangari, Joudi RR Sinjal, Cathrien A. L Sondak, Calvyn FA Suzanne L Undap Victoria E. N. Manoppo