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All Journal Jurnal Ilmu Kelautan Kepulauan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Firdaut Ismail
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Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology

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Perhitungan Nilai Digital Radiansi Berdasarkan Band Pada Citra Alos Avnir-2 Di Wilayah Sidangoli Dehe Kecamatan Jailolo Selatan Kabupaten Halmahera Barat Rustam E Pembonan; Muh Ansar Amran; Firdaut Ismail
Jurnal Ilmu Kelautan Kepulauan Vol 1, No 2 (2018)
Publisher : Fakultas Perikanan dan Kelautan. Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.483 KB) | DOI: 10.33387/jikk.v1i2.940

Abstract

Citra satelit yang digunakan dalam penelitian ini adalah Citra ALOS AVNIR-2 dengan resolusi spasial 10 m dan terdiri atas empat band yang terdiri atas tiga band merupakan spektral visible (cahaya tampak) dan satu gelombang merupakan spektral infrah merah. Cakupan area dari citra ALOS AVNIR-2 yang digunakan dalam penelitian ini adalah wilayah Sidangoli Dehe Kecamatan Jailolo Selatan Kabupaten Halmahera Barat. Adapu tujuan dari penelitian ini adalah menentukan nilai digital radiansi pada citra ALOS AVNIR-2 di Wilayah Sidangoli Dehe. Metode yang digunakan dalam penelitian ini merupakan aplikasi algoritma dalam pengolahan dan analisis citra. Sebelum melakukan koreksi radiansi citra maka harus dilakukan pengolahan awal terhadap citra yang meliputi koreksi atmosferik, koreksi geometric, dan komposit citra. Hasil dari penelitian ini merupakan citra radiansi yang telah dikoreksi secara matematis dengan model algoritma melalui transformasi dari Nilai Digital (DN) yang merupakan bilangan berbasis 28. Nilai digital citra radiansi tersebut terintegrasi secara langsung dengan histogram sehingga dapat divisualisasikan melalui julat gelombang spektral. Citra dari hasil penelitian ini diketahui bahwa nilai digital radiansi masing-masing band dari Citra ALOS AVNIR-2 yaitu band 1 dengan nilai 0 – 110 wm-2sr-1 μm-1, band 2 dengan nilai 0 – 121 wm-2sr-1 μm-1, band 3 dengan nilai 0 – 111 wm-2sr-1 μm-1, dan band 4 dengan nilai 0 – 170 wm-2sr-1 μm-1.
Struktur komunitas ikan karang di perairan Pulau Maitara, Kota Tidore Kepulauan. Provinsi Maluku Utara Nebuchadnezzar Akbar; Firdaut Ismail; Rustam E Paembonan
Jurnal Ilmu Kelautan Kepulauan Vol 1, No 1 (2018)
Publisher : Fakultas Perikanan dan Kelautan. Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (876.747 KB) | DOI: 10.33387/jikk.v1i1.677

Abstract

ABSTRAKKawasan pesisir Pulau Maitara memiliki potensi mangrove, lamun dan terumbu karang. Ekosistem terumbu karang menyediakan tempat hidup untuk berbagai jenis organisme laut. Ikan karang merupakan organisme laut yang mendiami karang untuk dijadikan sebagai tempat tinggal. Perairan pulau Maitara kaya akan keanekaragaman karang tetapi data dan informasi untuk ikan karang masih sangat sedikit. Tujuan penelitian untuk memperoleh data struktur komunitas ikan karang. Penelitian dilakukan pada April 2018. Metode pengambilan data ikan karang menggunakan metode underwater visual census (UVC).Pengambilan data kualitas air dilakukan pada setiap stasiun pengamatan. Analisis data ikan karang meliputi kelimpahan, keanekaragaman jenis, dominansi dan keseragaman jenis. Hasil penelitian menunjukan parameter lingkungan perairan mendukung kehidupan terumbu karang dan biota perairan. Identifikasi ikan karang ditemukan 8 famili, 19 genus dan 54 spesies dengan total individu 460 ekor. Ikan karang ditemukan tiga kelompok yakni ikan indikator, ikan target dan ikan mayor. spesies dari genus Chaetodon banyak ditemukan dibandingkan dengan yang lain. Kelimpahan ikan karang berdasarkan stasiun pengamatan diperoleh stasiun I yakni 0,51 ind/m2, stasiun II 0,39 ind/m2 III yaitu 0,41 ind/m2. Kelimpahan ikan indikator adalah 0,50 individu/m2, ikan target 0,77 ind/m2 dan ikan mayor 0,05 ind/m2. Indeks keanakeragaman ikan ditemukan secara keseluruhan masuk dalam kategori tinggi, nilai indek dominansi yang ditemukan memperlihatkan dominansi yang rendah dan indeks keseragaman jenis menunjukan bahwa komunitas dalam keadaan stabil.Kata kunci : Dominansi, ikan karang, kelimpahan, keanekaragaman, keseragaman, pulau Maitara dan underwater visual census.
The spatial distribution of coral diversity and conection to the oceanography conditions of Tidore Island Waters Abdul Motalib Angkotasan; Abdul Ajiz Siolimbona; Salnudin Salnuddin; Firdaut Ismail; Asmar Hi Daud; Nyoman Metta N Natih
Depik 2025: Special Issue ICMF
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.0.0.47445

Abstract

The Optimal coral reefs are distributed in shallow waters between 0 and 30 m deep, influenced by the hydro-oceanographic variability of the waters. Globally, corals are distributed in various forms of water predominantly found in the Coral Triangle region. This study aims to examine the spatial distribution of coral biodiversity in the Tidore Island Waters. This study was conducted in the Tidore Island Waters at three research stations, namely Tugulufa Station, Toloa Station and Tanjun Konde Station. This study analyzed the spatial distribution of coral and the relationship between coral biodiversity and the hydro-oceanographic conditions of the Tidore Island waters. The results showed that the highest coral diversity was found at Toloa Station, with the largest area being the Acropora tabulate coral life form. Acropora coral species were found throughout the research location, with the highest percentage of cover found at Toloa Station. Temperature and salinity variables are the main characteristics in the three research locations. Temperature has a role and main characteristics in Toloa Station. The spatial distribution of Acropora corals is related to temperature and salinity variability.Keywords:Coral reefTidore waterTemperatureSalinity
General description of the habitat of Acropora halmahera based on a literature approach (Wallace & Wolstenhome 1998) Firdaut Ismail; Abdul Ajiz Siolimbona; Nebuchadnezzar Akbar; Rustam E Paembonan; Irmalita Tahir; Najamuddin Najamadidin; Abdul Motalib Angkotasan
Depik 2025: Special Issue ICMF
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.0.0.46992

Abstract

Acropora halmahera is one of the coral species that has an important role in the coral reef ecosystem Wolstenhome (1998) found in Loloda Island. A. halmahera is an endemic species found in the Halmahera sea. This coral species has not yet received information about the distribution in the marine area of the North Maluku archipelago. Habitat influences morphogenetics. Information on the general description of the habitat of this species has not been found (unpublished). A. halmahera is a coral species that ecologically also plays a role in influencing sedimentation rates and serves as a place for marine organisms to live. The study aims to describe the habitat of A. halmahera in Small Islands, North Maluku. Data collection of Acropora halmahera and coral life forms on three islands using Line Intercep Transect (LIT). Samples of A. halmahera were taken 32 cm branch. Morphometric measurements of A. halmahera were conducted in the laboratory. Environmental variables were takenwas conducted to see the relationship of the environment to the station. The results showed that A. halmahera has a habitat preference at a depth of 5-20 meters, temperature 29-33 C, salinity 32-35 ppt, and pH 7.1-8. Sandy bottom substrate conditions for the growing area of A. halmahera species. PCA analysis showed that each station characterized environmental variables. Data showed that 13 coral life forms were found with variations in coral cover at each station. The environment was generally favorable for species to grow and thrive. These findings provide useful insights for coral reef conservation and management in the Halmahera region, and can serve as a reference for further research on other coral species.Keywords:EndemicArchipelagoBranching CoralMorphologySmall Island
Preliminary study oceanography and environmental parameters of habitat endemic species Halmahera walking shark (Hemiscyllium halmahera) on Indopacific Ocean Area in North Maluku Indonesia Nyoman Metta N Natih; Nebuchadnezzar Akbar; Dietriech G Bengen; I Wayan Nurjaya; Riyadi Subur; Abdurrachman Baksir; Firdaut Ismail; Iswandi Wahab; Dondy Arafat; Rustam E Paembonan; Abdul Ajiz Siolimbona; Rasidi Rasidi; Asep Sandra Budiman; Beginer Subhan
Depik 2025: Special Issue ICMF
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.0.0.46913

Abstract

The Halmahera Walking Shark (Hemiscyllium halmahera) is an endemic species in the Halmahera Sea. Information related to the environment in general has not been described in a complex manner. The environment is the main factor to support the life of biota. Environmental characteristics are a determining factor in the sustainability of biota. The study aims to provide information related to the physical environment of the habitat of the H. halmahera species. Primary data collection was carried out directly (in situ). Current data was taken using the Lagrange method using a currents drogue. Tides using tidal palms and observed for 24 hours. Secondary data was taken from Marine Copernicus and the Geospatial Information Agency (BIG). All data were tabulated and analyzed by Ocean Data View (ODV) software. The results of the study found that the surface current velocity was found to be in the fast current category. Current speed descriptively provides information on the life of H. halmahera. Primary data shows that the direction of the surface current moves to the east and north. Secondary data in vertical distribution shows weak zonal and meridional current shifts. The tidal pattern was found to be two high and low tides (semidiurnal). The distribution of surface temperature was found to be around 30-32oC. The vertical temperature profile found three layers, namely 1-13m (30oC), 65m (25oC) and 71m (20oC). The chemical environment showed all normal variables. The physical and chemical environmental conditions support H. halmahera to inhabit the sea area of Morotai Island. The environmental description has provided a brief understanding of how the ecological role of the H. halmahera species. Management and sustainability of the environment in the future due to climate change can be done with information on habitat characteristics.Keywords:coral triangleHalmaheranicheNorth Malukutropical
Co-Authors Abdul Ajiz Siolimbona Abdul Motalib Angkotasan Abdurrachman Baksir Asep Sandra Budiman Asmar Hi Daud Beginer Subhan Dietriech Geoffrey Bengen Dondy Arafat I Wayan Nurjaya Irmalita Tahir Iswandi Wahab Muh Ansar Amran Najamuddin Najamadidin Nebuchadnezzar Akbar Nyoman Metta N Natih Rasidi Rasidi Riyadi Subur, Riyadi Rustam E Paembonan Rustam E Pembonan Salnudin Salnuddin