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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX
Unstain N.W.J. Rembet
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Community structure of seaweed beds in Mantehage Island, North Sulawesi, Indonesia Sormin, Hartarto; Gerung, Grevo S.; Rembet, Unstain N.W.J.
AQUATIC SCIENCE & MANAGEMENT Vol 3, No 2 (2015): Oktober
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.3.2.2015.14043

Abstract

Title (Bahasa Indonesia): Struktur komunitas rumput laut di Pulau Mantehage, Provinsi Sulawesi Utara Seaweeds are an important marine resource for coastal community. They are used as medicine, paper materials, biofuel and direct consumption as vegetable or in food industries. Data collection in Mantehage island used Seagrass Watch method combined with line transect method with quadrat. This study found 29 species of seaweeds consisting of 13 species of Chlorophyta, 4 species of Phaeophtya and 12 species of Rhodophyta. Water temperatures ranged from 28–30ºC and pH ranged from 8.14–8.69, while salinity ranged between 30.8–31.9 ppt. Mantehage island waters has 100 % visibility with the current speed range of 30–42 cm/sec. INP of Caulerpa racemosa has the highest value at all sites. Diversity index ranged from 0.799–1.093 considered as low and dominance index ranged between 0.635–0.697 categorized as normal. Eveness index ranged from 0.303–0.365 showing that the seaweed community was under pressures. Rumput laut pada saat ini menjadi komoditas penting bagi masyarakat pesisir. Manfaat rumput laut selain dikonsumsi juga dijadikan sebagai obat, bahan baku kertas dan biofuel. Data di pulau Mantehege dikumpulkan menggunakan metode Seagrass watch yang dikombinasikan dengan metode transek garis dan kuadran. Ditemukan 29 spesies rumput laut yang terdiri dari 13 alga hijau Clorophyta, 4 alga cokelat Phaeyophtya dan 12 alga merah Rhodophyta. Substrat pada lokasi penelitian berupa karang mati dan batu karang. Suhu di perairan Pulau Mantehage di lokasi penelitian berkisar 28–30ºC. pH di lokasi penelitian yaitu 8,14–8,69 dengan salinitas berkisar 30,8–31,9 ppt. Kecerahan di Pulau Mantehege yaitu 100% dan kecepatan arus di kisaran 30–42 cm/detik. Nilai INP Caulerpa racemosa mempunyai nilai tertinggi pada semua lokasi. Indeks Keanekaragaman (H’) pada semua lokasi didapat berkisar 0,799–1,093 yang dikategorikan rendah dan biasa. Nilai Indeks Dominasi (D) pada semua lokasi berkisar antara 0,635–0,697 yang dikategorikan sedang. Indeks Keseragaman (J’) berkisar 0,303–0,365 yang menggambarkan komunitas pada kondisi tertekan.
KONDISI EKOLOGI DAN NILAI MANFAAT HUTAN MANGROVE DI DESA LANSA, KECAMATAN WORI, KABUPATEN MINAHASA UTARA Takarendehang, Roberto; Sondak, Calvyn F.A.; Kaligis, Erly; Kumampung, Deslie; Manembu, Indri S.; Rembet, Unstain N.W.J.
JURNAL PESISIR DAN LAUT TROPIS Vol 6, No 2 (2018): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.6.2.2018.21526

Abstract

Mangrove forests are biological natural resources that have a variety of potentials that benefit human life both directly and indirectly and can be felt, both by people who live near the mangrove forest area and people who live far from the mangrove forest area. Mangrove forests also have high economic and ecological values but are very vulnerable to damage if they are not wise in maintaining, preserving and managing them. Collecting data to find out the benefits of mangrove forests for the people of Lansa Village is done by survey methods in the form of direct interviews with the community using the ecosystem.Data collection on the ecological conditions of mangroves is carried out by making plots. The number of plots in this study are nine plots. Each plot has a size of 10x10 m. Retrieval of data in this study are: the type of mangrove, the relative density of species, the relative frequency of types, the closure of relative types, and the index of important values. Based on the results of interviews with the community regarding mangrove forests are mangrove regulation services, mangrove provisioning services and mangrove cultural services. The most extensive assessment of the use of mangrove forests is the construction of embankments of Rp. 2,583,300,000 and followed by utilization of fish Rp. 1,521,429,000 and then utilization of fuel wood Rp259.200.000. With the total economic value of the mangrove forest in Lansa Village, it is Rp.4,363,929,000 per year. Hutan mangrove merupakan sumberdaya alam hayati yang mempunyai berbagai keragaman potensi yang memberikan manfaat bagi kehidupan manusia baik yang secara langsung maupun tidak langsung dan bisa dirasakan, baik oleh masyarakat yang tinggal di dekat kawasan hutan mangrove maupun masyarakat yang tinggal jauh dari kawasan hutan mangrove. Hutan mangrove juga memiliki nilai ekonomis dan ekologis yang tinggi akan tetapi sangat rentan terhadap kerusakan apabila kurang bijaksananya dalam mempertahankan, melestarikan dan mengelolahnya. Pengambilan data untuk mengetahui manfaat hutan mangrove bagi masyarakat Desa Lansa dilakukan dengan metode survei dalam bentuk wawancara langsung dengan masyarakat pengguna ekosistem.Untuk pengambilan data kondisi ekologi mangrove dilakukan dengan pembuatan plot. Jumlah plot dalam penelitian ini adalah sembilan plot. Setiap plot memiliki ukuran 10x10 m. Pengambilan data dalam penelitian ini adalah: jenis mangrove, kerapatan relatif jenis, frekwensi relatif jenis, penutupan relatif jenis, dan indeks nilai penting. Berdasarkan hasil wawancara dengan masyarakat mengenai hutan mangrove adalah mangrove regulation service, mangrove provisioning service dan mangrove cultural services. Penilaian pemanfaatan hutan mangrove yang paling banyak yaitu pembangunan tanggul Rp 2.583.300.000 dan diikuti oleh pemanfaatan ikan Rp 1.521.429.000 dan kemudian pemanfaatan kayu bakar Rp 259.200.000. Dengan jumlah total nilai ekonomi hutan mangrove Desa Lansa adalah Rp 4.363.929.000 per tahun.
KONDISI IKAN KARANG FAMILI CHAETODONTIDAE DI DAERAH PERLINDUNGAN LAUT DESA BAHOI KECAMATAN LIKUPANG BARAT KABUPATEN MINAHASA UTARA Jacqline Laikun; Ari B Rondonuwu; Unstain N.W.J. Rembet; Stephanus V. Mandagi
Jurnal Ilmiah PLATAX Vol. 2 No. 3 (2014): EDISI SEPTEMBER-DESEMBER 2014
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.2.3.2014.9121

Abstract

The coral reefs are a sundry of marine life. Which one is reef fish in family Chaetodontidae. This fish is  indicator of the coral reef condition. The aim from the research is : discover of spatial distribution of the reef fish family Chaetodontidae and find out of the intercourse of reef fish family Chaetodontidae with the coral reef presence based on growth of coral form. The research was do in the coral reef at Marine Protected Areas in Bahoi Village District of West Likupang North Minahasa Regency, on Tuesday, December 23rd, 2014. The research is using to do the surveying method. The data is collecting distribution of the fish Chaetodontidae (amount from species and individuals to using by technic visual census). The total of reef fish family Chaetodontidae those found in Marina Protected Areas in Bahoi Village is about 20 species, with total of the individuals at a depth of 3 meters and 10 meters is (56,66 and 57,33 individuals/150m2). Keywords : Coral reefs, Chaetodontidae, Bahoi   ABSTRAK Terumbu karang merupakan tempat berbagai macam biota laut. Salah satu Ikan karang adalah ikan famili Chaetodontidae. Ikan ini merupakan ikan indikator terumbu karang. Tujuan dari penelitian ini : mengetahui kelimpahan dari ikan karang famili Chaetodontidae. Penelitian ini dilakukan di Daerah Perlindungan Laut Desa Bahoi Kecamatan Likupang Barat Kabupaten Minahasa Utara, pada hari selasa, tanggal 23 Desember 2014. Penelitian ini menggunakan metode survey. Data yang dikumpulkan adalah kelimpahan ikan Chaetodontidae (Jumlah spesies dan individu dengan menggunakan teknik sensus visual). Jumlah ikan karang famili Chaetodontidae yang di temukan di Daerah Perlindungan Laut Desa Bahoi berjumlah 20 spesies, dengan jumlah individu pada kedalaman 3 meter dan 10 meter berjumlah (56,66 individu/150m2 dan 57,33/150m2 individu). Kata kunci : Terumbu karang, Chaetodontidae, Bahoi 1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi
The Distribution of Genus Favia (Oken, 1815) at the Reef Flats of Likupang Kampung Ambong Village Minahasa Utara . Reskiwati; Laurentius Th. X. Lalamentik; Unstain N.W.J. Rembet
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.7.1.2019.22597

Abstract

Six species of Favia were found in this study i.e, Favia pallida (Dana, 1846), Favia speciosa (Dana, 1846), Favia favus (Forskål, 1775), Favia truncatus (Veron, 2000), Favia rotundata (Veron and Pichon, 1977) and Favia matthaii (Vaughan, 1918). The species with the highest percentage of coral cover was Favia pallida (0,386 %). The values of Dominance Index showed that there were no dominant Favia species on Kampung Ambong coral reef flats. Diversity Index (H’) of Favia was 1,47. There are two distribution patterns shown by Favia on Kampung Ambong coral reef flats area, which are clumped and uniformed.Keywords: Favia, Distribution  ABSTRAKDalam penelitian ini ditemukan 6 spesies karang genus Favia, yaitu Favia pallida (Dana, 1846), Favia speciosa (Dana, 1846), Favia favus (Forskål, 1775), Favia truncatus (Veron, 2000), Favia rotundata (Veron and Pichon, 1977) dan Favia matthaii (Vaughan, 1918). Spesies dengan persentase tutupan karang tertinggi adalah Favia pallida (0,37 %). Nilai Indeks Dominasi menunjukkan tidak ada spesies karang genus Favia yang dominan pada rataan terumbu Kampung Ambong. Indeks keanekaragaman karang genus Favia menunjukkan nilai H’ = 1,47. Terdapat dua Pola distribusi yang diperoleh dari karang genus Favia di rataan terumbu Kampung Ambong, yaitu mengelompok dan seragam.Kata Kunci : Favia, Distribusi
Coral Reef Conditions of Hogow and Dakokayu Islands Southeast Minahasa Regency Billy N. Ompi; Unstain N.W.J. Rembet; Ari B. Rondonuwu
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.7.1.2019.22743

Abstract

This research objective was to determine the condition of Coral Reef ecosystems in Dakokayu and Hogow Islands, Southeast Minahasa Regency. The method that has been used in this studies that is Line Intercept Transect (LIT) by diving activities at 5 meter and 10 meters depth with 50 meters transect length. Each biota passed by the line transect recorded according based on shape of growth.Coral Reefs conditon in Hogow Island in 5 meters and 10 meters depth were categorized as a “Good” where the percentage of live coral cover in 5 meters depth is 70.12% and in 10 meters depth  is 55.78%. The condition of Coral Reefs on Dokokayu Island at a depth of 5 meters is categorized “Good” with the percentage of live coral cover is 56.32% while in the 10 meters depth it is categorized as “Medium” with the percentage of live coral cover is 48.10%. Water quality parameters such as temperature, salinity, brightness, pH, and dissolved oxygen (DO) are within the range of tolerance for Coral Reefs to survive.Keywords: Condition, Coral Reef, Hogow, DokokayuABSTRAKTujuan penelitian untuk mengetahui kondisi ekosistem terumbu karang di Pulau Dakokayu dan Pulau Hogow, Kabupaten Minahasa Tenggara.  Metode yang telah digunakan dalam penelitian ini yaitu Line Intercept Transek (LIT) dengan melakukan penyelaman pada kedalaman 5 dan 10 meter dengan panjang transek 50 meter.  Setiap biota yang dilewati transek akan dicatat menurut bentuk pertumbuhannya. Secara umum, kondisi terumbu karang di Pulau Hogow pada kedalaman 5 meter dan 10 meter, dikategorikan Baik dimana persentasi tutupan karang hidup pada kedalaman 5 meter sebesar 70,12% dan pada kedalaman 10 meter sebesar 55,78%.  Kondisi terumbu karang di Pulau Dokokayu pada kedalaman 5 meter dikategorikan Baik  dengan persentase tutupan karang hidup 56,32% sedangkan di kedalaman 10 meter dikategorikan  Sedang  dengan persentase tutupan karang hidup 48,10 %. Parameter kualitas perairan seperti suhu, salinitas, kecerahan, pH, dan oksigen terlarut (DO) berada dalam kisaran toleransi bagi terumbu karang untuk dapat bertahan hidup.Kata Kunci : Kondisi, Terumbu Karang, Hogow, Dokokayu
Coral Fishes the Famili Chaetodontidae in Coral Reef Waters of Para Island Sub District Tatoareng, Sangihe Kepulauan Regency Ari B. Rondonuwu; Unstain N.W.J. Rembet; Ruddy Dj. Moningkey; John L. Tombokan; Alex D. Kambey; Adnan S. Wantasen
Jurnal Ilmiah PLATAX Vol. 1 No. 4 (2013): Edisi September - Desember 2013
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.1.4.2013.3705

Abstract

This study aims to determine the distribution and abundance of reef fish families chaetodontidae in coral reef waters of Para Island Sub District Tatoareng. This study was conducted at 4 stations. Data collected was done using visual census on the 50-meter transect line at 5 meters depth. In addition to revealing the number of species and abundance of individuals chaetodontidae, data analysis aimed to determine number of species, individual abundance, and the community index. Based on the identification, obtained 27 species from 3 genera and 217 number of individuals.  The highest number of species found at station Para 1.  7 species are always found in all observation stations, Chaetodon kleinii, C. punctatofasciatus, C. lunulatus, C. trifascialis, C. vagabundus, Heniochus varius, H. chrysostomus. The species with the largest number of individuals that is Chaetodon kleinii (45 individuals). Chaetodontidae fish species diversity index ranged between 2.207-2.866. Dominance Index are categorized low in the range of 0.078-0.122.  Similarity index are categorized high in the range of 0.922-0.971. Keywords : coral fishes, chaetodontidae, coral reef, Para Island
Co-Authors . Reskiwati Adnan S. Wantasen Alex D. Kambey Ari B Rondonuwu Ari B. Rondonuwu Billy N. Ompi Calvyn F. A. Sondak, Calvyn F. A. Erly Kaligis Grevo S Gerung Hartarto Sormin Indri Manembu Jacqline Laikun John L. Tombokan Kumampung, Deslie Laurentius Th. X. Lalamentik Ruddy Dj. Moningkey Stephanus V. Mandagi Takarendehang, Roberto