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All Journal JURNAL ILMIAH PLATAX JURNAL PERIKANAN DAN KELAUTAN TROPIS
Gaspar Manu
Fakultas Perikanan dan Ilmu Kelautan, Universitas Sam Ratulangi Manado
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Environmental Science

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STUDI FITOPLANKTON DI DANAU TONDANO PROVINSI SULAWESI UTARA Manu, Gaspar; Baroleh, Martinus; Kambey, Alex D
JURNAL PERIKANAN DAN KELAUTAN TROPIS Vol 6, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.156 KB) | DOI: 10.35800/jpkt.6.1.2010.108

Abstract

This research was conducted in Tondano Lake North Sulawesi for 3 month from June to August 2007.  The research was aimed to identify species abundance of phytoplankton.  Phytoplankton were collected by using a 40 μm  large plankton net.  Results showed that phytoplankton consisted of 32 genera.   It also indicated that the highest individual abundance was shown by Fragillaria (2903 individuals),  followed by Microspora (2349 individuals), Closterium ( 984 individuals), Zynema (803 individuals), Melosira (770 individuals), and Anabaena (693 individuals) respectively with monthly sampling the highest abundance was on August (4227 individuals), followed by June (3516 individuals), and July (3493 individuals).
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.
Condition of Coral Reefs in the Waters of Kalasey Satu Village, Minahasa Regency, North Sulawesi Pitoy, Israel; Rembet, Unstain N. W. J.; Rondonuwu, Ari B.; Wantasen, Adnan S.; Kambey, Alex D.; Manu, Gaspar; Tombokan, John L.
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.v11i1.45892

Abstract

The waters of Kalasey I Village have various resources and environmental services that are the potential to be utilized sustainably, such as tourism. The development activities in the tourism sector look so fast in this area with the establishment of several tourism infrastructures, such as diving centers, cottages, resorts,s and restaurants. These activities are thought to be able to affect the coral reef ecosystem. This study aims to determine the coral reef conditions, especially the reef flat, based on the percent cover of the live corals. Data collection was carried out at a depth of 3 meters with 3 replications using an Underwater Photo Transect (UPT) technique. Data obtained were analyzed using Coral Point Count with excel extension (CPCe) software. Based on the percent cover of live corals, the condition of coral reefs in the Kalasey 1 village waters was classified as poor with a coral cover percentage of 2.93%. Keywords: Tourism development, Underwater Photo Transect (UPT), percent cover, coral point count (CPCe) Abstrak Perairan di Desa Kalasey I memiliki berbagai sumberdaya serta jasa lingkungan yang berpotensi untuk dimanfaatkan secara berkesinambungan seperti potensi pariwisata. Kegiatan pembangunan di sektor pariwisata terlihat begitu pesat di wilayah ini dengan berdirinya sejumlah infrastruktur pariwisata seperti diving center, cottage, resort dan rumah makan, dimana aktivitas tersebut diduga dapat mempengaruhi ekosistem terumbu karang. Penelitian ini bertujuan untuk mengetahui kondisi terumbu karang, khususnya rataan terumbu (reef flat), berdasarkan persentase tutupan karang di perairan Desa Kalasey I Kecamatan Mandolang Kabupaten Minahasa. Pengambilan data dilakukan pada kedalaman 3 meter dengan 3 ulangan, menggunakan teknik Underwater Photo Transect (UPT) dan data yang diperoleh dianalisis menggunakan software Coral Point Count with excel extension (CPCe). Diperoleh hasil kondisi terumbu karang tergolong dalam kategori miskin dengan persentase tutupan karang sebesar 2.93 %. Kata kunci: Pembangunan pariwiata, Underwater Photo Transect (UPT), persen tutupan, coral point count (CPCe)
Aquatic Pollution Study Based on Analysis of Mollusk Diversity as a Bioindicator Lohoo, Anneke V.; Manu, Gaspar; Mantiri, Rose O.S.E.; Kambey, Alex D.
Jurnal Ilmiah Platax Vol. 11 No. 2 (2023): ISSUE JULY-DECEMBER 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i2.51420

Abstract

This research aims to determine the condition of coastal water quality at Sam Ratulangi University's Marine Field Station by looking at the diversity of mollusks and the physical and chemical parameters of the waters as supporting parameters. The method used to determine the research location was the Quadratic Transect method, while to determine the sampling point the random sampling method was used, namely selecting sampling locations randomly based on areas with dominant activities. The mollusks taken are mollusks that are still alive and can be seen attached, both on the surface of the substrate and inside the substrate. Observations of the place and substrate where the individual attached/immersed themselves were carried out by measuring the water quality, where the temperature was 300C, salinity 28%0, and pH 8). The identification results obtained were 29 types. In the final step after the sample has been identified, all data obtained will be analyzed to obtain results from the research carried out. This research is expected to provide information about the condition of water pollution at Sam Ratulangi University's Marine Field Station in determining management policies and preserving the aquatic ecosystem. Keywords: Bioindicators, Molluscs, Diversity, Pollution. Abstrak Penelitian ini bertujuan untuk mengetahui kondisi kualitas perairan pesisir Marine Field Station Universitas Sam Ratulangi dengan melihat keanekaragaman moluska serta parameter fisika kimia perairan sebagai parameter pendukung.  Metode yang digunakan dalam menentukan lokasi penelitian adalah metode Transek Kuadrat, sedangkan untuk menentukan titik pengambilan sampel digunakan metode random sampling, yaitu pemilihan lokasi pengambilan sampel secara acak berdasarkan kawasan dengan kegiatan yang dominan. Moluska yang diambil adalah Moluska dalam keadaan masih hidup yang terlihat menempel, baik di permukaan substrat maupun di dalam subtrat. Pengamatan tentang tempat maupun substrat dimana individu tersebut menempel/membenamkan diri dilakukan pengukuran kualitas air, di mana suhu 300C, salinitas 28%0 dan pH 8). Hasil  indentifikasi diperoleh sebanyak 29 jenis. Langkah terakhir setelah sampel diidentifikasi, semua data yang diperoleh akan dianalisis untuk memperoleh hasil dari penelitian yang dilakukan. Penelitian ini diharapkan sebagai informasi tentang kondisi pencemaran perairan Marine Field Station Universitas Sam Ratulangi dalam penentuan kebijakan pengelolaan serta menjaga kelestarian ekosistem perairan. Kata kunci: Bioindikator, Moluska, Keanekaragaman, Pencemaran.
Condition Factors and Length-Weight Relationships of Fifteen Important Fish Species in the Estuary of Manado Bay Indonesia Manu, Gaspar; Bataragoa, Nego E.; Mandagi, Stephanus V.; Dauhan, Dulce Maria; Sampe, Ayumi Angraini
Jurnal Ilmiah Platax Vol. 11 No. 2 (2023): ISSUE JULY-DECEMBER 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i2.51491

Abstract

This research aims to analyze condition factors and growth patterns of estuary fish in Manado Bay. Sampling was carried out at the river estuary in Manado Bay, the Pineleng River in Bahu, the Sario River estuary in Sario, the Tondano River estuary in Sindulang, and the Bailang River estuary in Tumumpa. Sampling was carried out in June and July 2023 in the new moon and full moon phases at each river mouth. The fishing gear uses a beach seine 20 m long with a net height of 2 m. Analysis of condition factors and growth patterns using a length-weight relationship approach. Fulton's Condition Factor: K=100W/L3 Where K is the condition factor, W is the weight of the fish and L is the length of the fish (total length). Relative condition factor: Kn=W/Ŵ, where W is the weight of the fish and Ŵ is the estimated weight of the fish from the analysis of the length-weight relationship. Allometric and isometric growth patterns with length-weight relationship analysis: W=aLb where W is the weight of the fish (g), L is the length of the fish (cm), a and b are constants. During the research, 43 fish species were obtained and 15 of them were classified as important species whose presence was ≥1% relative abundance. Fulton's K obtained ranged from 0.69-1.76, the lowest species was 0.69 Stolephorus commersonnii and the highest was 1.76 Neovespicula depressifrons. The Kn value obtained for almost all species was ≈ 1.0, except for Sillago sihama, which was much smaller, namely 0.77. The value of the constant b relationship between length and weight varied between 2.22 in Caranx ignobilis and 3.9 in Ambassis gymnocephalus. The growth pattern is isometric for six species, negative allometric for four species, and positive allometric for five species. Keywords: Species, condition, allomotric, isomatric. Abstrak Penelitian ini bertujuan untuk manganalisis factor kondisi dan pola pertumbuhan ikan muara sungai di Teluk Manado. Pengambilan sampel dilakukan pada muara sungai di teluk Manado, Sungai Pineleng di Bahu, muara Sungai Sario di Sario, muara Sungai Tondano di Sindulang dan muara Sungai Bailang di Tumumpa. Sampling dilakukan pada bulan Juni dan Juli fase bulan baru dan bulan purnama pada masing-masing muara sungai. Alat tangkap menggunakan pukat pantai panjang 20 m dengan tinggi jaring 2 m. Analisis faktor kondisi dan pola pertumbuhan dengan pendekatan hubungan panjang-berat. Fulton’s Condition Factor: K=100W/L3 Di mana K adalah fator kondisi, W berat ikan dan L panjang ikan (panjang total). Faktor kondisi relative: Kn=W/Ŵ, di mana W adalah berat ikan dan Ŵ adalah berat ikan yang diduga dari analisis hubungan panjang-berat. Pola pertumbuhan allometrik dan isometrik dengan analisis hubungan panjang-berat: W=aLb dimana W adalah berat ikan (g), L panjang ikan (cm), a dan b adalah konstanta. Selama penelitian diperoleh 43 speses ikan dan 15 diantaranya tergolong speses penting yang kehadirannya ≥1% kelimpahan relatif. Fulton’s K diperoleh berkisar antara 0,69-1,76 spesies terendah 0,69 Stolephorus commersonnii dan tertinggi 1,76 Neovespicula depressifrons. Kn diperoleh hampir seluruh spesies nilai ≈ 1,0 kecuali Sillago sihama jauh lebih kecil yakni 0,77. Nilai konstatnta b hubungan panjang berat berfariasi antara 2,22 pada Caranx ignobilis dan 3,9 pada Ambassis gymnocephalus. Pola pertumbuhan isometrik enam spesies, allometrik negatif empat spesies dan allometrik positif lima spesies. Kata Kunci: Spesies, kondisi, almotrik, isomatrik.
Co-Authors Adnan Wantasen Alex D Kambey Alex D. Kambey Anneke V. Lohoo Ari B. Rondonuwu Dauhan, Dulce Maria John L. Tombokan Lalamentik, Laurentius Th. X. Mandagi, Stephanus V. Mantiri, Rose O.S.E. Martinus Baroleh Nego E. Bataragoa, Nego E. Pitoy, Israel Pratasik, Silvester B. Rembet, Unstain Sambali, Hariyani Sampe, Ayumi Angraini Unstain N. W. J. Rembet, Unstain N. W. J. Wewengkang, Fabiola