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INDONESIA
Jurnal Kelautan : Indonesian Journal of Marine Science and Technology
Published by Universitas Trunojoyo Madura
ISSN : 19079931     EISSN : 24769991     DOI : -
Core Subject :
This journal encompasses original research articles, review articles, and short communications, including: Marine and fisheries ecology and biology, Marine fisheries, Marine technology, biotechnology, Mariculture, Marine processes and dynamics, Marine conservation, Marine pollution, Marine and coastal resource management, Marine and fisheries processing technology, Salt technology, Marine geology, physical and chemical oceanography.
Arjuna Subject : -
Articles 394 Documents
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Karakteristik Pola Arus dan Nutrien Perairan Pada Areal Budi Daya Rumput Laut Di Pantai Bone-Bone Kota Baubau Liza Kurnia Mansur; Maruf Kasim; Ratna Diyah Palupi
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.17479

Abstract

ABSTRAKBudidaya rumput laut banyak dijadikan sebagai mata pencaharian bagi masyarakat pesisir Pantai Bone-Bone, dalam budidayanya rumput sangat dipengaruhi oleh beberapa faktor oseanografi perairan, seperti faktor kimia nitrat dan fosfat yang dapat memengaruhi pertumbuhan rumput laut, dan faktor fisika perairan seperti arah dan kecepatan arus. Penelitian ini dilaksanakan pada bulan Maret 2022. Tujuan penelitian ini adalah untuk mengetahui karakteristik pola arus dan kaitannya dengan kandungan nitrat dan fosfat pada areal budi daya rumput laut. Pengukuran arus dilakukan secara insitu dengan menggunakan current meter EAM 213-D, selanjutnya datanya diolah menggunakan software MIKE 21. Pengambilan sampel nutrien menggunakan botol sampel kaca 150 ml pada permukaan perairan yang dilakukan pada 5 titik stasiun, kemudian dilanjutkan dengan analisis laboratorium, dengan metode analisis Brucine (nitrat) dan analisis spektrofotometer (fosfat). Hasil didapatkan pola arus di lokasi penelitian saat pasang menuju ke arah Barat dengan kecepatan arus 0,1-0,25 m/s dan saat surut menuju arah ke Timur dengan kecepatan 0,016-0,080 m/s. Nilai konsentrasi nitrat yang diperoleh di lokasi penelitian berkisar 0,074-0,112 mg/L sedangkan nilai konsentrasi fosfat berkisar 0,023-0,040 mg/L. Pola dan kecepatan arus memberikan pengaruh terhadap sebaran nutrien, semakin tinggi kecepatan arus perairan maka semakin luas sebaran nutrien di perairan. Berdasarkan nilai kecepatan arus dan nilai konsentrasi nutrien yang diperoleh di setiap stasiun, secara keseluruhan Pantai Bone-Bone termasuk layak digunakan sebagai daerah budi daya rumput laut.Kata kunci: Arus, nutrien, Pantai Bone-Bone, pasang surut, rumput laut.ABSTRACTSeaweed cultivation is widely used as a livelihood for the coastal people of Bone-Bone Beach; in its cultivation, the grass is strongly influenced by several marine environmental factors, such as nitrate and phosphate, and physics factors, such as currents velocity that can affect the growth of seaweed. This study was held on March 2022. This study aims to determine the characteristics of current patterns and their relation to nitrate and phosphate content in seaweed cultivation areas. Current measurement is carried out in situ using the current meter EAM 213-D, then the data is processed using MIKE21 software. Nutrient sampling using a 150 ml glass sample bottle on the surface of the waters was carried out at 5 station points, then continued in the laboratory with the Brucine (nitrate) analysis method and spectrophotometer (phosphate) analysis. The results obtained a current pattern at the study site when the tide was heading Westwards with the speed of the current 0,1-0,25 m/s and then at low tide towards the East with the speed 0,016-0,080 m/s. The nitrate concentration value obtained ranges from 0.074-0.112 mg/L, and the phosphate concentration value ranges from 0.023-0.040 mg/L; the pattern and speed of the current have an influence on the distribution of nutrients, the higher the rate of the water current, the wider the distribution of nutrients in the waters. Based on the value of the current velocity and the value of the concentration of nutrients obtained at each station, overall Bone-Bone Beach is decent for use as a seaweed cultivation area.Keywords: Bone-bone beach, currents, nutrients, seaweed, tides.
Pemetaan Perubahan Garis Pantai di Pantai Tanjung Siambang, Pulau Dompak Dengan Metode Digital Shoreline Analysis System (DSAS) Sri Maharani; Mario Putra Suhana; Esty Kurniawati
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.18298

Abstract

ABSTRAKPantai Tanjung Siambang merupakan tempat wisata yang rentan akan pengaruh alam karena memiliki topografi yang landai, substrat berpasir dan berlumpur serta banyaknya kegiatan manusia. Hal ini mempengaruhi posisi garis pantai di Pantai Tanjung Siambang dari tahun ke tahun sehingga perlu dilakukan penelitian pemantauan perubahan garis pantai yang terjadi di pantai tersebut. Penelitian ini bertujuan untuk mengetahui jarak dan laju perubahan garis pantai yang terjadi di Pantai Tanjung Siambang menggunakan citra satelit Sentinel-2A. Metode yang digunakan untuk menghitung perubahan garis pantai yaitu metode Net Shoreline Movement (NSM) dan End Point Rate (EPR) yang terdapat dalam Digital Shoreline Analysis System (DSAS). Hasil penelitian menunjukkan bahwa selama 5 tahun terakhir, Pantai Tanjung Siambang mengalami abrasi dengan rata-rata perubahan sebesar -10.18 meter dengan laju -2.12 meter/tahun. Akresi juga terjadi dekat muara sungai dengan rata-rata akresi sebesar 1.43 meter dan laju 0.3 meter/tahun. Secara keseluruhan, pada periode 2016-2021 Pantai Tanjung Siambang dominan mengalami pengurangan daratan (abrasi). Pemanfaatan data penginderaan jauh dan berbagai software pengolahan data penginderaan jauh sangat bermanfaat untuk penyediaan informasi mengenai perubahan garis pantai yang akan berguna dalam pengambilan kebijakan terkait pembangunan di wilayah pesisir dan juga pencegahan atau mitigasi terhadap kemungkinan bencana yang akan terjadi di wilayah pantai tersebut.Kata Kunci: Abrasi, Akresi, Citra Satelit Sentinel-2A, Digital Shoreline Analysis System, Pantai   Tanjung SiambangABSTRACTTanjung Siambang Beach is a tourist spot that is vulnerable to natural influences because it has a sloping topography, sandy and muddy substrate and lots of human activities. This affects the position of the coastline at Tanjung Siambang Beach from year to year, so it is necessary to conduct research to monitor shoreline changes that occur on the beach. This study aims to determine the distance and rate of change of coastline that occurs at Tanjung Siambang Beach using Sentinel-2A satellite imagery. The methods used to calculate shoreline changes are the Net Shoreline Movement (NSM) and End Point Rate (EPR) methods contained in the Digital Shoreline Analysis System (DSAS). The results showed that during the last 5 years, Tanjung Siambang Beach experienced abrasion with an average change of -10.18 meters at a rate of -2.12 meters/year. Accretion also occurs near river mouths with an average accretion rate of 1.43 meters and a rate of 0.3 meters/year. Overall, in the 2016-2021 period Tanjung Siambang Beach has predominantly experienced land reduction (abrasion). Utilization of remote sensing data and various remote sensing data processing software is very useful for providing information about changes in the coastline that will be useful in making policies related to development in coastal areas as well as prevention or mitigation of possible disasters that will occur in these coastal areas.Keywords: Abrasion, Accretion, Sentinel-2A Satellite Imagery, Digital Shoreline Analysis System, Tanjung Siambang Beach
Hubungan Kerapatan Dengan Laju Produksi Serasah Mangrove di Kawasan Muara Badak Kutai Kartanegara Kalimantan Timur Naufal Athasyah; Mohammad Sumiran Paputungan; Dewi Embong Bulan
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.19861

Abstract

ABSTRAKEkosistem mangrove mempunyai fungsi yang sangat penting karena memiliki fungsi fisik dan ekologis. Mangrove adalah satu di antara ekosistem produktif yang produksi primernya terdiri dari serasah, dekomposisi dan nutrisi. Tingginya produktivitas mangrove akan terkait dengan rantai makanan yang bergantung pada serasah yang terurai. Penelitian ini bertujuan untuk mengetahui hubungan kerapatan mangrove dengan laju produksi serasah di kawasan Muara Badak Kutai Kartanegara Kalimantan Timur. Penelitian ini telah dilaksanakan pada bulan Juli – Agustus 2022. Data kerapatan dan produksi serasah mangrove diambil pada transek berukuran 10 m2. Serasah mangrove diambil pada 2 stasiun penelitian menggunakan litter-trap dengan ukuran 1x1 meter selama 1 bulan dengan pengambilan sampel sebanyak 3 kali setiap selang waktu 10 hari. Hasil penelitian menunjukkan jenis mangrove yang dominan ditemukan pada 2 stasiun penelitian yaitu Sonneratia alba, Rhizophora mucronata, Rhizophora apiculata, dan Avicennia marina. Sementara itu, kerapatan mangrove pada pada stasiun I rata-rata sebesar 1.100 ind/ha dan stasiun II sebesar 1.133 ind/ha. Laju produksi serasah mangrove pada stasiun I rata-rata sebesar 0,74 g/m²/hari dan pada stasiun II sebesar 1,64 g/m²/hari. Hasil uji korelasi menggunakan regresi linear menunjukkan bahwa terdapat korelasi yang kuat antara kerapatan mangrove dengan laju produksi serasah.Kata Kunci: Kerapatan mangrove, Muara Badak, produksi serasah.ABSTRACTThe mangrove ecosystem has a very important function because it has physical and ecological functions. Mangroves are one of the productive ecosystems whose primary production consists of litter, decomposition and nutrients. The high productivity of mangroves will be related to the food chain that depends on decomposed litter. This study aims to determine the relationship between mangrove density and litter production rate in the Muara Badak Kutai Kartanegara area, East Kalimantan. This research was carried out in July – August 2022. Data on mangrove litter density and production were taken on a 10 m2 transect. Mangrove litter was taken at 2 research stations using a 1x1 meter litter trap for 1 month with 3 samples taken every 10 days. The results showed that the dominant mangrove species were found at 2 research stations, namely Sonneratia alba, Rhizophora mucronata, Rhizophora apiculata, and Avicennia marina. Meanwhile, the density of mangroves at the station I averaged 1,100 ind/ha, and at station II was 1,133 ind/ha. The production rate of mangrove litter at station I was an average of 0.74 g/m²/day and at station II it was 1.64 g/m²/day. The results of the correlation test using linear regression showed that there was a strong correlation between mangrove density and litter production rate.Keywords: Litter production, Muara Badak, mangrove density
Kajian Parameter Oseanografi Perairan Pada Kawasan Konservasi Perairan di Kota Padang Untuk Mendukung Wisata Bahari (Studi Kasus: Pulau Bindalang dan Pulau Sibonta) Try Al Tanto; Ilham Ilham
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.17858

Abstract

ABSTRAKKawasan perairan sekitar P. Bindalang dan P. Sibonta merupakan salah satu kawasan konservasi perairan di Kota Padang. Lokasi ke dua pulau ini cukup jauh dari daratan utama, sekitar 13.3 - 16 Km dari Muara Padang. Kajian parameter oseanografi diperlukan agar dalam pengelolaannya dapat dilakukan secara benar dan lebih baik. Tujuannya adalah untuk menentukan karakteristik beberapa parameter oseanografi di sekitar pulau, yaitu pasang surut, arus, gelombang laut, suhu dan salinitas permukaan laut. Metode yang digunakan dalam kajian adalah deskriptif, dengan menjelaskan karakteristik dari masing-masing parameter oseanografi yang dikaji. P. Bindalang dan P. Sibonta di kelilingi oleh pantai beting dan berpasir putih dengan pecahan karang, tergolong landai, pantai cukup luas dan lebar. Kedalaman laut sekitar pulau tergolong perairan dangkal (mencapai 60 - 190 m), termasuk landas kontinen. Pasang surut yang terjadi adalah pasang surut campuran condong ganda dengan tunggang pasut (tidal range) 149.42 cm. Arus permukaan laut cukup rendah, sebesar 4.69 – 15.33 cm/s (P. Bndalang) dan 4.14 – 20.16 cm/s (P. Sibonta). Nilai suhu permukaan laut (SPL) berkisar 30.0 – 30.3°C dan 30.1 – 30.6°C, salinitas permukaan 33.6 – 33.8 ‰ dan 30.7 – 33.8 ‰, serta kecerahan perairan 3.4 – 13.15 m dan 13 – 17.4 m. Hasil yang diperoleh menunjukkan bahwa kondisi kawasan perairan pesisir di sekitar P. Bindalang dan P. Sibonta dalam kondisi sangat baik. Hal ini sangat mendukung untuk keberlanjutan kawasan konservasi tersebut dan dapat dikembangkan sebagai lokasi wisata bahari ke depannya.Kata kunci: Oseanografi, Pasang Surut, Arus, Gelombang, SPL, Salinitas, Pulau Bindalang, Pulau Sibonta.ABSTRACTWater areas at Bindalang and Sibonta Island is which one protected areas in padang city water. Both the islands longth enough from Muara Padang (13.3 – 16 Km). Studies of water and coastal important to do so it could manage with easy and better for future. The purpose is known oceanography paramaters such as tides, current, waves, SST and salinity. The methods was using descriptif, can explained the caracteristic of each oceanography parameters. The islands have beting coastal, white sand and coral broken, slope slightly (4.12 – 9.52°), width coastal areas. water depth at island around until 60 – 190 m, is continental shelf. Tide caracteristic is mix tide premordialy semidiurnal and tidal range 149.42 cm. Sea surface current were low of 4.6.9 – 15.33 cm/s (Bndalang Island) and 4.14 – 20.16 cm/s (Sibonta Island). Parameters of SST values 30.0 – 30.3°C and 30.1 – 30.6°C, salinity values were 33.6 – 33.8 ‰ and 30.7 – 33.8 ‰, and water visibility 3.4 – 13.15 m and 13 – 17.4 m (until 100 %). The conditions of coastal and water area was better, so this is very supportive for the sustainability of the designated conservation area.Keywords: Oceanography, Tides, Sea Current, Sea Waves, SST, Salinity, Bindalang Island, Sibonta Island.
Kepadatan dan Laju Pertumbuhan Bulu Babi (Tripneustes gratilla) di Perairan Letman, Kabupaten Maluku Tenggara Rosita Silaban; Johny Dobo
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.19152

Abstract

ABSTRAKAktivitas penangkapan biota padang lamun khususnya terhadap bulu babi cenderung ke arah penangkapan berlebih (over fishing). Pengambilan bulu babi di alam terus dilakukan tanpa mempertimbangkan aspek kelestariannya, sehingga ada kecenderungan populasi bulu babi tersebut menurun secara drastis dari tahun ke tahun. Penurunan stok bulu babi di alam akan semakin cepat jika tingkat eksploitasinya lebih sering dilakukan, karena penambahan individu baru (recruitment) dari populasi tersebut tidak sebanding dengan hasil tangkapan. Diperkirakan tingkat eksploitasi sumberdaya tersebut di alam telah melebihi batas yang diperbolehkan (over exploitation). Tujuan penelitian antara lain mengetahui dan menganalisis kepadatan dan laju pertumbuhan bulu babi (T. gratilla). Penelitian dilakukan di pesisir perairan Letman, Kepulauan Kei Kecil  selama bulan September sampai November 2022 dengan dua kali pengambilan sampel setiap bulannya. Sampel bulu babi diperoleh dari hasil pengambilan sampel menggunakan metode belt transek pada saat air surut dan dipasang tegak lurus garis pantai ke arah laut. Kepadatan bulu babi di perairan Letman tergolong rendah dengan distribusi tidak merata terkait kedalaman dan tutupan lamun. diameter bulu babi yang tertangkap berkisar antara 1.7-8.8 cm dengan ukuran rata-rata 5.2 cm. Hasil analisis menunjukan bahwa pertumbuhan bulu babi bersifat allometrik negatif, lambat dan diameter infinitif kecil.Kata kunci:  kepadatan, laju pertumbuhan, bulu babiABSTARCTFishing activities for seagrass biota, especially for sea urchins, tend to be over-fishing. Sea urchins are collected from nature without considering the aspect of sustainability, so there is a tendency for the sea urchin population to decrease drastically from year to year. The decline in sea urchin stocks in nature will accelerate if the level of exploitation is more frequent, because the addition of new individuals (recruitment) from the population is not proportional to the catch. It is estimated that the level of exploitation of these resources in nature has exceeded the permissible limits (over exploitation). The aims of the research included knowing and analyzing the density and growth rate of sea urchins (T. gratilla). The research is planned to be carried out in the coastal waters of Letman, Kei Kecil Islands from September to November 2022 with two samplings per month. Sea urchin samples were obtained from the results of sampling using the belt transect method at low tide and installed perpendicular to the shoreline towards the sea. The density of sea urchins in Letman waters is low with an uneven distribution regarding seagrass depth and cover. The diameter of the sea urchins caught ranged from 1.7-8.8 cm with an average size of 5.2 cm. The results of the analysis showed that the growth of sea urchins was negative allometric, slow and small infinitive diameter.Keywords: density, growth rate, sea urchins
Struktur Komunitas Fitoplankton Di Perairan Kabupaten Kaur Maestro Munru; Mukti Dono Wilopo; Yar Johan; Dewi Purnama; Person Pesona Renta
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.10212

Abstract

ABSTRAKFitoplankton merupakan salah satu jenis plankton tumbuhan yang berperan sebagai produsen primer dan menjadi parameter kualitas perairan. Penelitian ini bertujuan untuk menganalisis struktur komunitas fitoplankton di perairan Kabupaten Kaur bagian selatan. Penelitian ini dilakukan pada bulan Desember 2019 dan Oktober 2020. Metode penelitian ini dilakukan dengan menggunakan metode survei dalam pengumpulan data. Lokasi sampling ditentukan secara purposive. Hasil struktur komunitas fitoplankton di perairan Kabupaten Kaur bagian selatan, ditemukan tiga kelas fitoplankton pada tahun 2019, yaitu Bacillariophyceae, Dinophyceae, dan Cyanophyceae. Pada tahun 2020 juga ditemukan tiga kelas fitoplankton yaitu Bacillariophyceae, Chlorophyceae, dan Cyanophyceae. Kelimpahan rata-rata fitoplankton pada tahun 2019 sebesar 1045,41 ind/l, pada tahun 2020 rata-rata kelimpahan sebesar 2560,15 ind/l. Pada tahun 2019, keanekaragaman fitoplankton dikategorikan sedang, keseragaman dikategorikan tinggi, dan dominansi dikategorikan rendah. Pada tahun 2020, keragaman, keseragaman dan dominasi dikategorikan rendah. Fenomena busa tebal yang menutupi lokasi penelitian pada tahun 2019 berasal dari muara sungai yang merupakan lokasi pembuangan limbah dari kegiatan tambak udang di Desa Wayhawang, dan di lokasi penelitian teridentifikasi fitoplankton beracun yaitu Nitzchia sp. dan Pseudo-nitzschia.Kata Kunci : Struktur Komunitas, Fitoplankton, Perairan Kabupaten KaurABSTRACTPhytoplankton is a type of plant plankton that acts as a primary producer and becomes a parameter of water quality. This study aims to analyze the structure of the phytoplankton community in the waters of the southern part of Kaur Regency. This research was conducted in December 2019 and October 2020. This research method was conducted using a survey method in data collection. The sampling location was determined purposively. The results of the phytoplankton community structure in the waters of the southern Kaur Regency, it was found that there were three classes of phytoplankton in 2019, namely Bacillariophyceae, Dinophyceae, and Cyanophyceae. In 2020, three classes of phytoplankton were also found, namely Bacillariophyceae, Chlorophyceae, and Cyanophyceae. The average abundance of phytoplankton in 2019 was 1045.41 ind / l, in 2020 the average abundance was 2560.15 ind / l. In 2019, the diversity of phytoplankton was categorized as moderate, uniformity was categorized as high, and dominance was categorized as low. In 2020, diversity, uniformity and dominance will be categorized as low. The phenomenon of thick foam that covers the research location in 2019 originates from the river estuary, which is the location of disposal waste from shrimp pond activities in Wayhawang Village, and at the research location a toxic phytoplankton was identified, namely Nitzchia sp. and Pseudo-nitzschia.Keywords: Community Structure, Phytoplankton, Kaur Regency Waters.
Sebaran Suhu Permukaan Laut Teluk Bone Pada Tahun 2021 Menggunakan Citra Satelit Terra Modis Dwi Rosalina; Yakub Suleman; Ainurridha Shaliha; Rezza Ruzuqi
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.18999

Abstract

ABSTRAKSuhu permukaan laut merupakan salah satu parameter oseanografi yang sangat penting bagi kehidupan organisme di lautan. Sama seperti daratan, kehidupan laut juga memerlukan panas untuk dapat menjaga keberlangsungan hidup. Oleh karena pentingnya suhu permukaan laut, penelitian ini bertujuan untuk mengetahui sebaran suhu permukaan laut dengan menggunakan citra satelit Terra Modis pada perairan Teluk Bone secara spasial dan temporal. Data yang diolah merupakan data suhu permukaan laut tahun 2021 yang diperoleh dari sensor satelit Terra MODIS level-3 yang diunduh dari NASA (OCEAN COLOR atau link http://modis.gfsc.nasa.gov/data, kemudian pengolahan data citra dilakukan menggunakan perangkat lunak SeaDas dan ArGIS dengan tahap pengambilan data dengan studi kasus di Perairan Teluk Bone. Berdasarkan hasil penelitian, sebaran suhu permukaan laut tertinggi berada pada November berkisar antara 29,36º-34,52ºC dengan nilai rata-rata 30,83ºC dan suhu terendah berada pada Agustus berkisar antara 26,64º-32,32ºC dengan rata-rata SPL 28,70ºC. Hasil tersebut menunjukkan bahwa sensor satelit Terra MODIS, telah memberikan hasil baik pada data suhu permukaan laut selama tahun 2021. Tiap bulan suhu permukaan laut mengalami kenaikan dan penurunan, hingga puncaknya masing-masing terjadi pada bulan November dan Agustus.Kata Kunci: sebaran suhu permukaan laut, suhu,Teluk Bone, Terra MODISABSTRACTSea surface temperature is one of the most important oceanographic parameters for the life of organisms in the oceans. Just like land, marine life also needs heat to be able to maintain its survival. Because of the importance of sea surface temperature, this study aims to determine the distribution of sea surface temperature using Terra Modis satellite imagery in the waters of Bone Bay spatially and temporally. The data processed is sea surface temperature data for 2021 obtained from the Terra MODIS level-3 satellite sensor downloaded from NASA (OCEAN COLOR or link http://modis.gfsc.nasa.gov/data), then image data processing is carried out using a SeaDas and ArGIS software with data collection stage with case studies in Bone Bay Waters. Based on the research results, the distribution of the highest sea surface temperature is in November ranging from 29.36º-34.52ºC with an average value of 30.83ºC and the lowest temperature is at August ranges from 26.64º-32.32ºC with an average SST of 28.70ºC. These results show that the Terra MODIS satellite sensor has provided good results on sea surface temperature data for 2021. Every month sea surface temperatures experience increases and decreases, until the peaks occur in November and August respectively.Keywords: sea surface temperature distribution, temperature Bone Bay, Terra MODIS
Oseanographic Conditions of Grenn Mussel Cultivation (Perna viridis) Using Multilevel Plastic Baskets Method in Salemo Island Waters, Pangkep Regency, Indonesia Muhammad Farid Samawi; Abd. Rasyid Jalil; Shinta Werorilangi
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.17382

Abstract

ABSTRACTCultivation of green mussels (Perna viridis) using multilevel plastic baskets has been carried out in the waters of Salemo Island, Pangkep Regency, Indonesia. The purpose of this study was to determine the oceanographic parameters that affect mussel cultivation at different water depths. The research treatment was placement on the surface and bottom of the waters (five meters deep) with different stocking densities. Green mussel cultivation is carried out for 4 months, namely May, June, July and August. Measurement of oceanographic parameters was carried out every month during green mussel cultivation, in situ, namely temperature, turbidity, salinity, pH, DO and those analyzed in the laboratory, namely TSS, TOM, Nitrate, Phosphate and the composition and abundance of plankton. Growth measurements of green mussels were also carried out, namely absolute weight and survival (SR). The results showed that the condition of oceanographic parameters differed between the surface and bottom waters, especially the parameters of TSS, turbidity, TOM, nutrients and plankton abundance. This situation is related to the absolute growth value and SR of mussels at different stocking densities and depths.Keywords: Oceanographic, green mussels, multilevel baskets, absolute growth, Salemo
Isolasi dan Identifikasi Molekuler Bakteri Rhizosfer dari Sedimen Mangrove Jenis Rhizopora sp. di Ekosistem Mangrove Tapak, Semarang Siti Dinda Chrisnawati; Aninditia Sabdaningsih; Oktavianto Eko Jati; Diah Ayuningrum
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.15952

Abstract

ABSTRAKEkosistem mangrove merupakan ekosistem yang memiliki tingkat kesuburan lebih tinggi dibandingkan dengan yang lainnya karena lokasinya yang masih dipengaruhi pasang surut air laut. Kesuburan tersebut juga dipengaruhi oleh tingginya unsur hara yang terkandung dalam sedimen khususnya rhizosfer atau sedimen yang berada di area sistem perakaran. Hal tersebut juga mendukung adanya pertumbuhan bakteri. Bakteri yang hidup di rhizosfer disebut dengan bakteri rhizosfer yang memiliki peranan penting dalam siklus biogeokimia sehingga dapat mengontrol lingkungan kimiawi mangrove. Tujuan dari penelitian ini yaitu untuk mengetahui isolat dan jenis dari bakteri rhizosfer yang didapatkan. Pengambilan sampel dilakukan di ekosistem mangrove Tapak pada November 2021 dan analisis sampelnya dilakukan pada bulan November 2021 – Februari 2022. Penelitian ini menggunakan pendekatan eksploratif. Sampel sedimen diambil pada 3 stasiun menggunakan sediment core. Sampel sedimen kemudian diisolasi pada media GSP dan nutrient agar untuk mendapatkan isolat murni. Sebanyak 19 isolat diperoleh dengan 9 isolat Gram positif dan 10 isolat Gram negatif, seluruh bentuk sel yang didapatkan adalah basil. Isolat TC.1c dilakukan identifikasi molekuler menggunakan primer universal 27F dan 1492R dengan amplifikasi gen 16S rRNA. Hasil identifikasi menunjukkan bahwa isolat TC.1c merupakan Bacillus mycoides yang memiliki potensi dalam mendegradasi bahan organic dan berperan dalam siklus denitrifikasi.Kata kunci: Mangrove, PCR, Rhizosfer, SedimenABSTRACTThe mangrove ecosystem is an ecosystem that has a higher fertility level compared to others because of its location, which is still influenced by the tides of seawater. This fertility is also influenced by the high nutrient content contained in sediments, especially in the rhizosphere or sediments that are present in the root system area. This also supports the growth of bacteria. Bacteria that live in the rhizosphere are called rhizosphere bacteria, which plays an important role in the biogeochemical cycle, thus being able to control the chemical environment of the mangrove. The objective of this study was to determined the isolates and types of rhizosphere bacteria obtained. Sampling was conducted in the Tapak mangrove ecosystem On November 2021, and sample analysis was carried out from November 2021 to February 2022. This study utilized an exploratory approach. Sediment samples were taken at 3 stations using a sediment core. The sediment samples were then isolated on GSP and nutrient agar media to obtain pure isolates. A total of 19 isolates were obtained, with 9 Gram-positive isolates and 10 Gram-negative isolates, and all the cell forms obtained were bacilli. Isolate TC.1c was molecularly identified using the universal primers 27F and 1492R with amplification of the 16S rRNA gene. The identification results indicate that the TC.1c isolate is Bacillus mycoides, which has the potential for degrading organic matter and plays a role in the denitrification cycle. Keywords: Mangrove, PCR, Rhizosphere, Sediment
Diversity of Coral Reefs at Insrom Beach, Biak Numfor Regency Eka Oviani Msen; Galuh P. W. Utami; Iriani Ira Bukorpioper
Jurnal Kelautan Vol 16, No 2: Agustus (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i2.17681

Abstract

ABSTRACTCoral reef represent tropical ecosystem encompassing a diverse marine biota associated with it. The aim if this study was to determine the types of coral reefs, diversity of coral reefs species, and the water quality on the Insrom coast. This study used a line transect method that stretched 50 meters in 3 stations at a depth of 3-5 meters. The results of this study indicated that there are 53 types of coral reefs. Overall diversity index (3.27). The water quality measurements yielded the following result: temperature 28-30oC, pH 7- 8- 2, salinity 30-32%, brightness ranging from 2.5-3 meters, current 3-8 m/sec, dissolved oxygen levels of 3-5 mg/l. The study’s conclusion is that there are 53 types of coral reefs. The insrom coast’s diversity index is 3.27 which shows high category according to Shannon-Wienner. The water quality of Insrom coast remains within tolerable range for the growth of coral reefs.Keywords:  Diversity, Types, Coral reefs.

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