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ILMU KELAUTAN: Indonesian Journal of Marine Sciences

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Published by Universitas Diponegoro

ISSN : 08537291 EISSN : 24067598 DOI : -

Core Subject : Science,

Earth & Planetary Sciences

ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and oceanography.

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Articles 743 Documents

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Prevalence, Insidence and Progression Black-band Disease on Scleractinian Coral (Montipora spp) in Shallow Water of Pari Islands Michael Delpopi; Neviaty Putri Zamani; Dedi Soedarma; Ofrie Johan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 20, No 1 (2015): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Black-band disease (BBD) is a persistent disease that cause the decline of the coral reef ecosystems, which is still slightly recorded in Indonesia, including in Pari Island, Thousand Islands. The objectives of this study were to determine progression, prevalence and incidence BBD on Montipora spp in shallow water of Pari Islands. Coral cover were estimated using line intercept transect (LIT) whereas the prevalence and incidence of BBD were carried out by using belt transect method with 1 m left and right of tape as long 20 m with 3 replications recorded approximately every two months. BBD progression was documented with a digital photograph method, the photograph of affected area of each coral was taken each day for 2 weeks. BBD was found to be spread in the surveyed area. The result show that prevalence and incidence of BBD showed a positive exponential relationship with water temperature. During the observation Both prevalence and incidence increased on May transitional season (wet-dry). The highest prevalence was found at 5,96 percent and whereas the maximum disease progression found at 0,46 cm/day.

The Influence of Temperature - Food Availability on the Tissue Growth of Sea Scallop Placopecten magellanicus Adi Santoso
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 3 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Studi terhadap pertumbuhan kerang simping Placopecten magellanicus, yang dibudidayakan dengan metode “suspended culture” telah dilakukan selama tujuh bulan di lokasi budidaya di Graves Shoal, Mahone Bay,Nova Scotia, Kanada. Benih scallop muda dipelihara dalam pearl nets dengan kepadatan 30-35 ekor dan ditempatkan pada empat lokasi yang mewakili perairan permukaan (7 m), dasar perairan (14 m), di luar lokasibudidaya (outer edge), di tengah-tengah lokasi budidaya (centre). Pertumbuhan jaringan lunak (whole tissue weight) diamati setiap bulan sekali. Monitoring terhadap suhu dan ketersediaan pakan pada permukaan dan dasar perairan juga dilakukan. Hasil penelitian menunjukkan bahwa tingkat pertumbuhan pada jaringan lunak lebih besar di permukaan perairan dibandingkan dengan di dasar perairan, tetapi tidak ada perbedaan nyata antara antara pertumbuhan di luar lokasi budidaya dengan di lokasi budidaya. Pertumbuhan jaringan lunak sendiri tidak ada korelasinya dengan suhu dan ketersediaan pakan di perairan.Kata kunci: suhu, ketersediaan pakan, berat total jaringan lunak, kerang simpingA study of the growth of the sea scallop, Placopecten magellanicus, under suspended culture conditions was carried out over a seven month period at a culture site in Graves Shoal, Mahone Bay,Nova Scotia – Canada.Scallop spat were cultivated in pearl nets at a density of 30-35 per net set at four locations corresponding to the surface (7 m) and bottom (14 m) at the outer edge and the center of the site. Whole tissue weight wasmeasured at monthly intervals. Environmental conditions represented as temperature and food availability at the surface and bottom over the same period were also monitored. The result showed that the mean values of whole tissue weight at the surface sites were greater than that at the bottom sites, but there were not significantly different between the outside sites and the inside sites. Growth in whole tissue weight was notto correlate to temperature - food availability.Key words: temperature, food availability, whole tissue weight, sea scallop

Distribution and Community Structure of Coral Reefs In The West Coast Of Sumatra Indonesia Rikoh Manogar Siringoringo; Tri Aryono Hadi; Ni Wayan Purnama Sari; Muhammad Abra; Munasik Munasik
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 1 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

This paper assesses the distribution and community structure of coral species in six locations along the west coast of Sumatra, namely Mentawai, Bengkulu, Nias, Padang Pariaman, Simeulue, and Central Tapanuli. Data collected using Line Intercept Transect (LIT) method obtained from 55 sites at six locations. The ordination analysis by using PRIMER 7 software indicates the corals do not distributed evenly. In this case, almost all of the corals distributed mainly in Central Tapanuli and followed by Bengkulu, making it the most diverse corals location in the west coast. Mentawai and Padang Pariaman were less diverse and relatively similar as clustered together, but Padang Pariaman reefs had more Montipora and Pocillopora while Mentawai reefs is mainly featured by Pavona and Psammocora. Although Nias reefs clustered into two different clusters, the main reef features were Porites and Pavona. Simeulue reefs appeared characterized by Porites and Psammocora. Porites known as a very common genus of coral and are found in the widest area of the world's coral reefs. The within-site species richness determined by using species accumulation curve. K-dominance curve showed that Bengkulu and Mentawai seemed to have the lowest cumulative abundance but then crossed over Central Tapanuli at the third most abundance species. There were 52 genera found from six locations, eight of them distributed in all locations. Approximately 90% of which were found in Central Tapanuli. There were no differences between live coral coverage within locations, yet Caswell’s neutral model showed that Mentawai and Bengkulu had more coral species than other locations, indicating that there were likely were less stress environmental conditions occurring in these two locations.

Uji Peptida Komersial Hym-248 terhadap Metamorfosis dan Penempelan Planula yang berasal dari Slick (Testing of Commersial Peptide Hym-248 on Metamorphoses and Settlement of Planulae Collected from Slick) Diah P Wijayanti; Elis Indrayanti
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 1 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Metamorfosis dan penempelan merupakan proses yang amat penting dalam siklus hidup koloni karang. Koloni karang hanya akan terbentuk jika larva planula berhasil bermetamorfosis dari larva planktonik menjadi bentik dan menempel pada substrat untuk kemudian bertumbuh menjadi koloni baru. Induktor berperan merangsang metamorfosis dan meningkatkan persentase jumlah zigot yang menempel dan berkembang menjadi koloni baru. Peptida komersial adalah neuropeptida golongan GLWamida yang bertindak sebagai hormon pemicu terjadinya metamorfosis planulae larva. Hasil penelitian menunjukkan, Hym-248, peptida komersial anggota GLWamida, mampu menginduksi metamorfosis dan penempelan planula yang berasal dari slick (kumpulan gamet yang terapung-apung di permukaan laut setelah dilepaskan koloni karang pada peristiwa spawning multispesifik). Slick dikoleksi dari Pulau Sambangan, Kepulauan Karimunjawa saat spawning masal terjadi pada bulan Maret. Seluruh dosis yang dicobakan mampu menginduksi proses metamorfosis dan settlement planula larva setelah planula diinkubasi dalam media yang telah diberi Hym-248. Hasil ini memberi peluang dilakukannya pembenihan larva planulae secara masal untuk keperluan restorasi terumbu karang dan budidaya karang. Kata kunci: metamorfosis, settlement, budidaya karang, Acropora, spawning masal, slick Settlement and metamorphosis, which leads to the formation of primary polyp, are critical steps in the life cycles of corals. Metamorphosis cue is necessary to create an internal trigger to initiate metamorphosis in coral larvae. Neuropeptides which act hormonally to induce metamorphosis, provide a reliable and efficient settlement cue for ex situ larval culture. Here we report that Hym-248, one member of GLWamide peptide can induce metamorphosis of planulae derived from collected slick. Experiments were done in Sambangan Island after March spawning event. The results showed that all applied doses of Hym-248 successfully induced the metamorphosis and settlement of planulae larvae produced from slick. The result of this study showed that coral propagules can be produced faster by applying the commercial peptide as the inducer which leads to mass production of coral propagules for coral culture. Key words: metamorphosis, settlement, coral culture, Acropora, mass-spawning, slick

Pola Sebaran Logam Herat Pb dan Cd di Muara Sungai Babon dan Seringin, Semaran Sri Yulina Wulandari; Bambang Yulianto; Sukristiyo Sukristiyo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 4 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Logam beratmerupakan salah satu polutanyangsering ditemukan dan menyebar diperairan estuarin. Penelitian ini bertujuan untuk mengetahui pola sebaran logam berat Pb dan Cd dalam kolom air di Muara Sungai Babon dan Seringin Semarang. Sampel air diambil di delapan stasiun dan dianalisa dengan AAS. Hasil penelitian menunjukkan bahwa dalam kolom air, rata-rata kandungan logam berat Pb sebesar 0,038-0,128 ppm, dan Cd sebesar 0,021-0,076ppm. Nilai ini sudah melampaui ambang batas baku mutu sebagaimana yang ditetapkan oleh Kep Men KLH Rl No 51/2004. Pola sebaran logam berat timah hitam (Pb) dan cadmium (Cd) cenderung menurun konsentrasinya pada perairan yang menuju ke arah lautKata kunci: Pb, Cd, air, pola sebaran

Burrowing Time of the Three Indonesian Hippoid Crabs After Artificial Dislodgment Yusli Wardiatno; Yuyun Qonita; Agus Alim Hakim
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 21, No 3 (2016): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Three species of hippoid crabs are the target species of intertidal fishery along coastal line in District Cilacap, south Java; namely Emerita emeritus, Hippa adactyla and Albunea symmista. In Adipala sandy beach, Cilacap an experiment was conducted to reveal the burrowing time and velocity of the crabs. The experiment was performed by removing the crabs from their burrows, measuring their carapace length, and releasing them immediately on the substrate. Burrowing time was measured from the start of burrowing to the disappearance of the entire carapace under the sediment surface. Among the three species, E. emeritus had the fastest burrowing time. As a consequence in terms of velocity, the burrowing velocity of Albunea symmista was higher than that of Hippa adactyla and Emerita emeritus; meaning that with the same size A. symmista needs longer time to burrow. By evaluating with other previous studies, the burrowing time and burrowing velocity of the three sand crabs were comparable. The ability of fast burrowing in the three species seems likely to be the advantage for their survival in large wave disturbed coarse sandy habitat and for their ability to widely exist along the sandy coast of south Java. Keywords: behavior; Indian ocean; intertidal; sand crab; south Java; swash zone

Penggunaan Berbagai Dosis Silase Darah Sebagai Diet Pakan Terhadap Pertumbuhan dan Kelangsungan Hidup Ikan Beronang (Siganus guttatus Bloch) Pinandoyo Pinandoyo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 4 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian ini dilakukan untuk mengetahui pengaruh pakan buatan dari sumber protein silase darah dengan dosisi berbeda terhadap pertumbuhan dan kelangsungan hidup ikan beronang (Siganus guttatus Bloch). Dalam penelitian ini digunakan empat perlakuan dan tiga ulangan. Setiap perlakuan diberi pakan yang mengandung silase darah sebanyak 100%, 75%, 50% dan 25% sebagai sumber protein hewani. Ikan yang digunakan berukuran rata-rata 19,45 – 21,20 g/individu yang dipelihara didalam akuarium berukuran 25 x 25 x 30 cm3 dengan kepadatan 5 ekor selama 35 hari. Hasil penelitian menunjukkan bahwa pakan dengan silase darah sebesar 50% menghasilkan pertumbuhan biomassa, laju pertumbuhan harian dan konversi pakan yang lebihbaik dibandingkan dengan pemakain silase darah 100%, 75% dan 25% (P<0,01). Akan tetapi tidak adanya perbedaan yang nyata (P>0,05) terhadap kelangsungan hidup.Kata kunci: Silase darah; Pertumbuhan; Klangsungan hidup; Ikan beronang (Siganus guttatus Bloch)This feeding experiment were conducted to know The effect of varrying dose of blood silage on the growth and survival rate of the rabbitfish. Five treatment and three replicate were use in this experiment. The dietcontained 100%, 75%, 50% and 25% of blood silage as a protein source. The body weight of the test fish was 19,45 – 21,20 g/individual were culture in a 25 x 25 x 30 cm3 of aquarium for 35 days. The result of theexperiment showed that absolute biomass growth, daily growth rate and feed convertion rate of fish fed diets containing blood silage up to 50% levels were significaly (P< 0,001) higher than the other. Therefore, unsignificant result (P>0,05) to survival rate.Key words: Blood silage; Growth; Survival; Rabbitfish (Siganus guttatus Bloch)

Tingkat Kematangan Gonad Populasi Lorjuk (Solen sp.) di Pantai Timur Surabaya (Gonad Maturity Level of Lorjuk’s (Solen sp.) Population at the East Coast Surabaya) Ninis Trisyani; Fita Hadimarta
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 18, No 1 (2013): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Lorjuk (Solen sp.) adalah pelecypoda yang memilki nilai ekonomis tinggi di Pantai Timur Surabaya. Saat ini kelimpahan Lorjuk sudah mulai menurun dan perlu dilakukan upaya stock enhancement. Penelitian ini bertujuan untuk mengetahui bagian dari siklus reproduksi berupa penentuan Tingkat Kematangan Gonad (TKG) Lorjuk yang ditangkap di Pantai Timur Surabaya. Pengambilan sampel sebanyak 30 individu dilakukan pada bulan Mei-Oktober tahun 2012 dengan interval waktu 2 minggu sekali. Pengamatan dilakukan secara langsung meliputi morfometri panjang tubuh dan berat tubuh Lorjuk serta diameter oositnya. Tingkat Kematangan Gonad dilakukan dengan pengamatan histologi gonad dan mengelompokkan TKG berdasarkan ilustrasi photomicrograph skala gametogenik pada Ensis arcuatus. Hubungan antara Tingkat Kematangan Gonad dengan diameter oosit Lorjuk mengikuti persamaan TKG=0.522+0.528 diameter oosit dengan korelasi sebesar 79.2. Hasil pengamatan menunjukkan bahwa TKG Lorjuk yang berada pada tahap matang dan tahap siap memijah diperoleh pada bulan Mei - Juni. Kata kunci : Lorjuk (Solen sp.), tingkat kematangan gonad, Surabaya Lorjuk (Solen sp.) is Pelecypoda that have a high economic value the East Coast Surabaya. Currently Lorjuk abundance has begun to decline and stock enhancement efforts are required. This study aims to determine the part of the reproductive cycle in the form of determination Lorjuk Gonad Maturity Level (Solen sp.) Were arrested on the East Coast Surabaya. Taking a sample of 30 individuals was conducted in May-October 2012 with a time interval of 2 weeks. Observations made directly covering morphometry body length and body weight and diameter oocystnya Lorjuk. Gonad Maturity Level (GML) was conducted by observing and classifying gonad histology based on illustrations photomicrograph gametogenic scale at Ensis arcuatus. The relationship between the level of maturity of gonads with oocytes diameter Lorjuk follow equation GML=0522+0528 oocyte diameter with a correlation of 79.2. The results of these observations indicate that the level of maturity of gonads Lorjuk which is at a mature stage and the stage ready to spawn acquired in May-June. Keywords : Lorjuk (Solen sp.), gonad maturity level, Surabaya

Wind-driven Coastal Upwelling Along South of Sulawesi Island Abdullah Habibi; Riza Yuliratno Setiawan; Akhmad Yusuf Zuhdy
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 15, No 2 (2010): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The sea in the vicinity of south of Sulawesi Island (SSI) is influenced by monsoon winds. The present observation shows that coastal upwelling in the region is a dominant process leading to high chlorophyll-a (Chl-a) concentration during southeast (SE) monsoon season. Southeasterly monsoon winds are responsible for the upwelling formation.The objective of the reseach was to describe the wind-driven upwelling occurrence. The bloom increases gradually, starting in May and climbing up to peak value (1.1 mg/m3) in August, then weakens in September. By utilizing a combination of satellite data of sea surface wind vector, sea surface temperature (SST), and surface Chl-a, the physical mechanism of the coastal upwelling in the SSI is investigated. Keywords : coastal upwelling, satellite remote sensing, wind speed, SST, Chl-a, south of Sulawesi island. Perairan di sekitar selatan Pulau Sulawesi dipengaruhi angin monsoon. Observasi menunjukkan bahwa upwelling pantai di perairan tersebut merupakan proses dominan yang menyebabkan meningkatnya konsentrasi klorofil-a selama musim monsoon tenggara. Tujuan penelitian ini adalah menggambarkan kejadian wind-driven upwelling. Angin monsoon dari tenggara adalah penyebab terbentuknya upwelling. Konsentrasi klorofil-a naik secara bertahap, dimulai di bulan Mei dan mencapai maksimum (1.1 mg/m3) di bulan Agustus, kemudian berkurang di bulan September. Menggunakan kombinasi data satelit dari angin permukaan laut, suhu permukaan laut, Chl-a permukaan, mekanisme fisik dari upwelling pantai di perairan di selatan Pulau Sulawesi Kata kunci : upwelling pantai, satelit penginderaan jauh, kecepatan angin, suhu permukaan laut, klorofil-a, selatan Pulau Sulawesi.

Makro Algae di Perairan Kepulauan Bangka, Belitung dan Karimata Ahmad Kadi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 2 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian makro algae di perairan Kepulauan Bangka, Belitung dan Karimata telah dilaksanakan pada bulan Juni tahun 2002. Metode penelitian lapangan dengan menggunakan transek kuadrat dan koleksi bebas. Keanekaragaman makro algae diperoleh 37 jenis. Biomassa tertinggi mencapai 4380 g/m² dengan nilai dominasi 87,94 diduduki oleh marga Sargassum berada di perairan Kepulauan Belitung.Kata kunci : Makro algae, Bangka, Belitung, Karimata.The research in Bangka, Belitung and Karimata waters was held on June 2002. Field method on the researchusing quadrat transect. The macroalgae samples were collected in situ. Biodiversity in the research locationwas 37 species and the higher biomass was 4380 g/m². Dominance value of genus was 87,94 by Sargassum at Belitung waters.Key words : Macroalgae, Bangka, Belitung, Karimata.

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