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ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Published by Universitas Diponegoro
ISSN : 08537291     EISSN : 24067598     DOI : -
Core Subject : Science,
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
Nutritional Content of Wild and Cultured Eel (Anguilla bicolor) from Southern Coast of Central Java Ima Wijayanti; Endang Sri Susilo Setiyorini
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 23, No 1 (2018): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.285 KB) | DOI: 10.14710/ik.ijms.23.1.37-44

Abstract

Culture of eel is being pursued in Indonesia, including Central Java,however there has been no data about proximate analysis of both wildand cultured eel. The purpose of this study was to determine the nutritional content of both the wild and the culturedeel Anguilla bicolor from Southern coast of Central Java. Nutritinonal content observed were moisture, protein, fat, ash and carbohydrates content, Vitamin A, Vitamin E and Mineral (Mg, Zn, Ca, Fe). The samples were obtained from Cilacap, Central Java. The data were analyzed by t-Test of Paired Two Sample for Means to determine difference of nutritional content between the wild and the culturedeel. The level of protein, carbohydrates, and Vitamin A were significantly different (P<0.05) between the wild and the cultured one. Whereas the content of water, fat and ash were not significantly different. Furthermore, there was no significant difference the Vitamin E level between the wild and the culturedeel.Mineral levels between the wild and cultured showed significantly different in Mg, Zn and Fe, but not significantly different in Ca. The moisture, protein, carbohydrate, fat, ash, vitamin A and vitamin E content of the wild eel were 62.81%, 16.20%, 1.39%, 17.92%, 1.34%, 3316.38 mg.100g-1, and 0.21% respectively, while the cultured eel were 62.36%, 17.50%, 0.13%, 17.72%, 1.33%, 2068.55 mg.100g-1 and 0.224%, respectively. Magnesium (Mg); Zinc (Zn); Iron (Fe) content of wild and cultured eel respectively 145.35 ppm; 20.9 ppm; 48.08 ppm and 121.97 ppm; 24.44 ppm; 30.99 ppm. Calcium (Ca) content wild and cultured eel were 0.52% and 0.48% respectively. Keywords : Anguilla sp, proximate, vitamin, mineral
Kondisi Terumbu Karang di Perairan Sabang Nanggroe Aceh Darussalam setelah Tsunami Edi Rudi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 1 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (122.628 KB) | DOI: 10.14710/ik.ijms.10.1.50-60

Abstract

Terumbu karang merupakan ekosistem yang kompleks dengan karagaman biologi tinggi yang mendukung hasil perikanan dan melindungi pantai dari aksi gelombang. Pasca bencana tsunami pada 26 Desember 2004 silam, belum banyak informasi kuantitatif mengenai kondisi terumbu karang di sekitar perairan Pulau Weh Sabang Nanggroe Aceh Darussalam. Penelitian mengenai kondisi terumbu karang ini dilakukan di enam stasiun pengamatan yang tersebar di bagian barat, tengah dan timur Pulau Weh dengan menggunakan Metode Transek Garis (LIT, Line Intercept Transect) berdasarkan bentuk pertumbuhan (life form) karang dankomponen benthik lainnya. Hasil penelitian memperlihatkan kondisi terumbu karang di perairan Pulau Weh masih baik, seperti di stasiun Benteng, Lhong Angen dan Gapang, namun di beberapa tempat telah memperlihatkan kerusakan mengkhawatirkan yang diperkirakan bukan akibat bencana tsunami, namun karena adanya usaha pemanfaatan sumberdaya alam tidak ramah lingkungan. Tidak ditemukan kerusakan yang serius akibat bencana tsunami terhadap ekosistem terumbu karang diperairan Pulau Weh diperkirakan berhubungan dengan tipe pantai yang pada umumnya berbatu, terjal dan sangat kokoh serta didukung oleh kondisi terumbu karang yang baik sehingga mampu menahan dan meredam aksi gelombang melalui sistem spur and groove.Kata kunci : terumbu karang, Sabang, LIT, tsunamiCoral reefs are complex ecosystems with high biological diversity that support productive fisheries and protect the beach from wave action. After tsunami disaster on last 26 December 2004, there is noquantitative information yet on condition of coral reef ecosystem around Sabang waters, Weh Island,Aceh, Indonesia. This research has been done in sixt station of Weh Island on early April 2005. LineIntercept Transects (LIT) are used to assest the sessile benthic community of coral reef. The community is characterized using lifeform categories which provide a morphological description of the reef community. The result shows that coral reef condition in Sabang Waters, Weh Island, generally is good, especially in Benteng, Lhong Angen and Gapang stations. However, in some sites coral reef condition are bad. There is no serious impact because of tsunami disaster on coral reef condition in Sabang Waters. The bad coral reef condition in some sites may be because of illegal fishing. Rocky shore and good coral reef condition are main factors which protect the beach ecosystem from wave action. Spur and groove system of the coral reef structure acts primarily as a dissipator of the continual wave energy operating on the coastal shoreline, and by dissipating wave energy before it reaches the shore, the beach area is protected from extensive wave action of tsunami.Key words: coral reef, Sabang, LIT, tsunami
Effect of Silvofishery on Ponds Nutrient Levels (Pengaruh Silvofishery Terhadap Kandungan Nutrien di Tambak) Anna Ida Sunaryo Purwiyatno; Fitri Agustriani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 19, No 2 (2014): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.637 KB) | DOI: 10.14710/ik.ijms.19.2.81-87

Abstract

Taman Nasional Sembilang merupakan salah satu taman nasional yang terletak di Sumatera Selatan dan menjadi kawasan mangrove terbesar di barat Indonesia. Sebagian besar wilayah mangrovenya telah mengalami alih fungsi menjadi tambak pasang surut. Hal ini menyebabkan timbulnya kekhawatiran kerusakan mangrove di taman nasional. Salah satu upaya untuk mempertahankan wilayah mangrove adalah dengan melakukan sistem silvofishery, yaitu penanaman mangrove dan budidaya bandeng dilakukan secara bersamaan di tambak. Penelitian ini bertujuan untuk menganalisis kualitas air dan kondisi nutrien di tambak di daerah restorasi silvofishery di Taman Nasional Sembilang. Penelitian dilakukan dengan metode purposive sampling di tambak silvofishery, tambak non-silvofishery, dan badan air sungai di seluruh wilayah taman nasional. Pengukuran dilakukan terhadap parameter kualitas air dan kandungan nutrien khususnya nitrat dan fosfat. Hasil penelitian menunjukkan bahwa kehadiran tanaman mangrove di daerah tambak mampu memperbaiki kandungan oksigen dan pH air tambak. Mangrove juga menunjukkan kemampuan dalam mengikat nitrat yang secara tidak langsung akan mencegah air tambak dari polusi. Namun, kandungan fosfat tinggi menunjukkan bahwa tanaman mangrove muda di wilayah restorasi belum mampu mengikat nutrien ini secara signifikan. Hasil penelitian ini menunjukkan bahwa hutan mangrove sangat bermanfaat bagi kegiatan budidaya tambak karena kemampuannya dalam menyerap polutan nutrient. Kata kunci: silvofishery; kolam; nitrat; fosfat; Taman Nasional Sembilang Sembilang National Park is one of the national parks which is located in South Sumatera and became the largest mangrove area in western Indonesia. Most of the mangroves area in this national park has been experiencing conversion to be tidal ponds. This has resulted in concerns on mangrove forest destruction in the park. One of the efforts to maintain mangroves area is by applying silvofishery system, which is mangrove planting and cultivation of milkfish in ponds performed simultaneously. This study aims to investigate the water quality and nutrient condition in the ponds in the area of silvofishery restoration at Sembilang National Park. The study was conducted by purposive sampling method in the silvofishery ponds, non-silvofishery ponds, and river water bodies throughout the park. Measurements conducted on water quality parameters and nutrient content, especially nitrate and phosphate. The results showed that the presence of mangrove in the ponds area is able to improve the oxygen content and pH of pond water. Mangroves also demonstrated the ability to bind nitrates which indirectly will prevent the pond water from pollution. However, the high phosphorus content showed that young mangrove plants in the restoration area have not been able to significantly bind the of this nutrient. The results of this study showed that mangrove forests are very beneficial for aquaculture activities because of its ability to absorb nutrient pollutants. Keywords: silvofishery; ponds; nitrate; phosphate; Sembilang National Park
Komposisi Jenis dan Kelimpahan Diatom Bentik di Muara Sungai Comal Baru Pemalang Ken Suwartimah; Widianingsih Widianingsih; Retno Hartati; Sri Yulina Wulandari
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 1 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1767.212 KB) | DOI: 10.14710/ik.ijms.16.1.16-23

Abstract

Diatom bentik mempunyai peranan penting sebagai produsen primer dalam siklus karbon di rantai makanan estuaria, sebagai sumber makanan yang penting bagi hewan-hewan surface dwellers (merayap di permukaan) dan deposit feeder, juga berperan penting dalam stabilisasi sediment. Penelitian telah dilakukan di Muara Sungai Comal Baru Desa Mojo, Kecamatan Comal, Kabupaten Pemalang pada bulan Jamuari-Maret 2006 dengan tujuan menganalisa komposisi genus dan kelimpahannya. Sampel sedimen diambil menggunakan core sampler dengan ketebalan 1 cm pada enam stasiun berdasarkan jaraknya dengan laut.  Hasil penelitian menunjukkan bahwa di Muara Sungai Comal Baru telah ditemukan 20 genus diatom bentik yang termasuk dalam 17 famili dengan ordo Pennales lebih banyak dari pada centrales.  Jumlah genus dan kelimpahan total diatom bentik pada bulan Maret lebih tinggi daripada bulan Januari dan Februari karena pengaruh lingkungan antara lain kandungan bahan organik, nutrient  dan curah hujan.Kata kunci: Diatom bentik, kelimpahan, komposisi genus, Sungai Comal Baru Benthic Diatom play important role as primer producer in carbon cycle of estuarine food web, as food source for surface dwellers and deposit feeder as well as as sediment stabliziation. The objectives of this present work was to analize genera composition and abundance of benthic diatom. The work had been carried out in mouth of Comal Baru River, Mojo-Comal, Pemalang during January-March 2006. Benthic diatom in 1 cm depth sediment were taken with core sampler in six stations according to the distance from the beach.  The results showed that twenty genera od benthic diatom belongs to 17 family were found in mouth in mouth of Comal Baru River, Mojo-Comal in which order of penalles more than cenytrales.  The number of genera and their abundance were greater in March than January and February because of environment such a organic matter, nutrient and rainfall. Key words: Benthic Diatom, abundance, genus composition, Comal Baru River
Studi Hubungan Panjang Tubuh (Body Length) Dengan Ketajaman Organ Penglihatan, Pada Ikan Selar (Seiar crumenophthalmus) Aristi Dian Purnama Fitri
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 7, No 3 (2002): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (661.679 KB) | DOI: 10.14710/ik.ijms.7.3.139-146

Abstract

Penelitian ini dilakukan untuk mengetahui hubungan antara panjang tubuh (body length/BL) dengan ketajaman penglihatan pada ikan Selar (Selar crumenophthalmus). Sebanyak lima ekor ikan Selar dengan ukuran panjang tubuh 160-220 mm BL dianalisis menggunakan prosedur histologi retina mata untuk mendapatkan jumlah kepadatan sel kon tertinggi sebagai dasar penentuan ketajaman penglihatan. Nilai kepadatan sel kon tertinggi adalah 243 sel/0,01 mm2 untuk ukuran panjang tubuh 160 mm dan 111 sel/ 0,01 mm2 untuk ukuran panjang tubuh 220 mm. Sedangkan nilai ketajaman penglihatan untuk ikan Selar berukuran 160 mm sebesar 0,09 dan 0.10 untuk ikan berukuran panjang tubuh 220 mm. Hal itu berarti semakin panjang ukuran tubuh ikan Selar maka akan semakin meningkat ketajaman penglihatannya.Kata Kunci: Ikan Selar (Selar crumenophthalmus); panjang tubuh; kepadatan sel kon; ketajaman penglihatan  Objective of the study is to investigate the correlation between body length and visual acuity of Bigeye fishes (Selar crumenophthalmus). Five S. crumenophthalmus of 160-220 mm body length was analyzed by using histological examination of their retinas to obtain highest density of cone cells as based on visual acuity. The maximum cone densities of 243 cells/0.01 mm2 for the fish of 160 mm body length and 111 cells/0.01 mm2 for the fish of 220 mm body length. The visual acuity for each specimens. i.e. 0.09 for fish with 160 mm body length and 0.10 for fish with 220 mm body length. The results suggests that the longer fish body length the stronger their visual acuity.Keywords: Bigeye (Selar crumenophthalmus); body length; cells cone density; visual acuity
Skrining Bahan Anti Kanker pada Berbagai Jenis Sponge dan Gorgonian Terhadap L1210 Cell Line Agus Trianto; Ambariyanto Ambariyanto; Retno Murwani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 3 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (164.778 KB) | DOI: 10.14710/ik.ijms.9.3.120-124

Abstract

Sejarah evolusi yang panjang pada biota laut menyebabkan biota laut mempunyai keanekaragaman molekul yang sangat tinggi. Potensi biota laut tersebut sebagai sumber obat anti kanker menjadi objek penelitianpenting dalam tahun-tahun terakhir. Bahan yang dipergunakan dalam penelitian ini adalah sponge dan gorgonian yang dikoleksi dari perairan Jepara pada kedalaman 1-3 m dan di perairan Labuhan Bajo, Florespada kedalaman 3-38 m. Sampling dilakukan dengan Skin diving dan SCUBA diving. Sampel kemudian diekstrak dengan metanol. Selanjutnya ekstrak diujikan terhadap sel kanker leukemia (L-1210 cell line) dengankonsentrasi 0, 1, 5 dan 10 ppm. Uji dilakukan pada media RPMI lengkap dan penghitungan daya hambat dilakukan dengan metoda direct counting. Ekstrak yang diperoleh dari sponge dan gorgonian berkisar antara 0,55 – 24,7% dari berat kering atau 0,36-7,34% dari berat basahnya. Seluruh ekstrak dari sampel-sampel mampu menghambat pertumbuhan L1210 cell line dan layak untuk pemurnian lanjut. Ekstrak metanol tiga jenis sponge (Xestospongia sp2 dan Phyllospongia sp1 dan UP8) dan fraksi etil asetat dari ekstrak gorgonian I. hippuris mempunyai IC-50 < 3 mg/mL, ekstrak metanol dari delapan jenis sponge (Agelas nakamurai, Ircina ramosa, A06, Phyllospongia lamellosa , Phyllospongia sp, UP9, Calispongia sp dan Fascaplynopsis sp) mempunyai IC-50 < 5 mg/mL, dan ekstrak metanol dari lima jenis sponge (Hyrtios erecta, Xestospongia sp, Cladocroce sp, Oceanapia cf. Amboiensis dan Haliclona sp.) dan fraksi air dari ekstrak gorgonian I. Hippuris mempunyai IC-50 < 10 mg mL Satu sponge Xestospongia sp 1 mengandung ekstrak yang mempunyai IC - 50 > 10 mg/mL.Kata kunci : Sponge, Gorgonian, L-1210, sel kanker, IC-50The long history of the evolution of marine organisms has made these organisms as a source of high molecular diversity. In search of a new anti cancer drugs, these organisms has become an intense object of research.Sponges and the gorgonian were colllected from Jepara and Labuan Bajo-Flores water on a depth of 1-3 m and 3-38 m repectively by Skin and SCUBA diving. The samples were extracted with methanol. Theextract were assayed against cancer cell (L-1210 cell line) with tested concentration range of 0, 1, 5 and 10 ppm. The cell line was cultured in complete RPMI media and growth inhibition was measured by directcounting. Methanol extract of sponges and gorgonian yielded approximately 0.55 – 24.7 % dry weight or 0,36 – 7.34 % wet basis. All methanol extract of the samples could inhibit the growth of L1210 cell line and is potential for further purification. Methanol extract from 3 species of sponges (Xestospongia sp2 dan Phyllospongia sp1 and UP8) and one ethyl acetate fraction of I. hippuris had IC-50 value < 3 mg/mL. Methanol extract of 8 species of sponges (Agelas nakamurai, Ircina ramosa, A06, Phyllospongia lamellosa, Phyllospongia sp, UP9, Calispongia sp dan Fascaplynopsis sp) had IC-50 < 5 mg/mL, methanol extract of 5 species of sponges (Hyrtios erecta, Xestospongia sp, Cladocroce sp, Oceanapia cf. Amboiensis and Haliclona sp.) and one water extract of I. hippuris had IC-50 < 10 mg mL. Methanol extract of one species of sponge (Xestospongia sp 1) had IC-50 > 10 mg/mL.Key words : Sponge, Gorgonian, L-1210, Cancer cell, IC-50
Aplikasi Teknologi Geomatika untuk Pemetaan Penurunan Tanah (Land Subsidence) di Pesisir Kota Semarang Agus Hartoko; Anindya Wirasatria; Muhammad Helmi; Bhaskoro Rochaddi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 1 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (20.795 KB) | DOI: 10.14710/ik.ijms.13.1.13-18

Abstract

Beberapa fenomena alam di kawasan pesisir dan kemudian menjadi bencana alam yang terjadi dalam kehidupan sehari hari diantaranya banjir, rob, longsor, gunung meletus, tsunami dan yang terjadi di Kota Semarang khususnya, adalah penurunan tanah (land-subsidence). Penelitian diiakukan dengan melakukan pengukuran perubahan ketinggian tanah berdasarkan 60 Titik Tinggi Geodesi (TTG-Bakosurtanal) maupun Bench Mark (BM) yang ada dikota Semarang dan data posisi koordinat masing-masing dengan GPS (Global Positioning System). Data geodetik yang diperoleh di transformasi menjadi data numerik, dan proses analisa geo-statistik diiakukan dengan metoda Kriging memakai perangkat lunak ER_Mapper 6.4 (Licensed user) dan Arc_GIS. Di samping data hasil pengukuran dilapangan, digunakan juga data Spaceshuttle Radar for Terrain Model (SRTM) untuk membentuk citra kontur 3 dimensi, juga menggunakan data citra Landsat_ETM. Berdasarkan data pengukuran yang diiakukan di lapangan dan rangkaian analisis spasial maka dapat dibuat plot laju penurunan tanah dan diketahui bahwa laju penurunan tanah Kota Semarang berkisar antara 1-9 cm/tahun, sehingga memerlukan pemetaan ulang, evaluasi tata ruang dan peraturan daerahKata kunci: penurunan tanah, kawasan pesisir, geo-statistik
The Efficacy of Bioaugmentation on Remediating Oil Contaminated Sandy Beach Using Mesocosm Approach (Efikasi Tehnik Bioaugmentasi dalam Memulihkan Pantai Berpasir Tercemar Minyak Menggunakan Pendekatan Mesokosm) Yeti Darmayati; Harpasis S. Sanusi; Tri Prartono; Dwi Andreas Santosa; Ruyitno Ruyitno
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 20, No 3 (2015): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (234.012 KB) | DOI: 10.14710/ik.ijms.20.3.143-152

Abstract

Bioremediation is basically consists of two approaches, biostimulation and bioaugmentation. The efficacy of bioaugmentation for combating oil pollution in field application is still argued. The purpose of study was to evaluate the efficacy of bioaugmentation and to compare the affectivity of single strain and consortium application in remediating oil polluted sandy beach. Experimental study in a field has been conducted with two (2) treatments and one (1) control in three different plots. The treatmens were introduction of a single strain (Alcanivorax sp TE-9) and a consortium (Alcanivorax sp. TE-9, Pseudomonas balearica st 101 and RCO/B/08-015) cultures into oil contaminated sediment. The experiment in mesocosm approach was taken place in Cilacap coast. Arabian light crude oil was used in the concentration of 100.000 mg.kg-1 sediment. Changes of oil concentration, bacterial density and pore water quality have been monitored periodically for 3 months. The result showed that oil degradation percentage and bacterial growth in both treatments were higher than in control. After 3 months, the percentage of oil degradation experiment in control, single strain and formulated consortium treatments were observed at 60.4%, 74.5% and 73.5%. It proves that bioaugmentation tehnique can enhance significantly oil biodegradation in sandy beach. The applications of bacteria in single or consortium culture give no different impact on their affectivity for bioremediation in Cilacap sandy beach. By data extrapolation it can be predicted that both of treatments able to reduce remediation time from 210 days into 135–137 days. Bioaugmentation can be proposed as a good solution for finalizing oil removing in Cilacap sandy beach when oil spilled occurred in this environment. Keywords: Bioremediation, bioaugmentation, oil, sandy beach, Alcanivorax, mesocosm, Cilacap   Bioremediasi pada dasarnya terdiri dari dua pendekatan yaitu biostimulasi dan bioaugmentasi. Teknik bioaugmentasi  dalam menanggulangi pencemaran minyak di lapangan masih diperdebatkan efektivitasnya. Penelitian ini bertujuan untuk mengevaluasi efikasi tehnik bioaugmentasi serta membandingkan efektivitas kultur tunggal dan konsorsium  dalam memulihkan pantai berpasir tercemar minyak. Studi eksperimental di lapangan telah dilakukan dengan menggunakan dua perlakuan dan satu kontrol di tiga plot berbeda, Perlakuannya adalah penambahan bakteri kultur tunggal (Alcanivorax sp TE-9) dan bakteri konsorsium (Alcanivorax sp. TE-9, Pseudomonas balearica st 101 dan RCO/B/08-015) ke dalam sedimen yang tercemar minyak. Eksperimen dengan pendekatan mesokosm dilakukan di pantai Cilacap. Minyak mentah ringan Arabia dengan konsentrasi 100.000 mg.kg-1 sedimen digunakan sebagai bahan cemaran. Perubahan konsentrasi minyak, kepadatan bakteri dan parameter lingkungan diamati secara periodik selama 3 bulan percobaan. Hasil penelitian menunjukkan bahwa persentase degradasi minyak dan densitas bakteri di sedimen perlakuan lebih tinggi daripada kontrolnya. Setelah 3 bulan eksperimen, persentase degradasi minyak pada kontrol, perlakuan kultur tunggal dan konsorsium masing-masing teramati 60.4%, 74.5% and 73.5%. Hal ini membuktikan bahwa tehnik bioaugmentasi secara signifikan mampu meningkatkan biodegradasi minyak di pantai berpasir. Pemberian mikroba dalam bentuk kultur tunggal ataupun konsorsium mempunyai efektivitas yang tidak berbeda untuk proses bioremediasi di pantai berpasir Cilacap.  Dengan ekstrapolasi data dapat diduga bahwa kedua perlakuan bioaugmentasi ini mampu mempercepat waktu pemulihan lingkungan dari 210 hari ke 135-137 hari. Bioaugmentasi dapat diusulkan sebagai solusi yang cukup baik untuk menghilangkan minyak pada tahap akhir pembersihan pantai berpasir Cilacap, jika terjadi tumpahan minyak di lingkungan ini. Kata kunci: single strain, consortium, bioaugmentation, oil, bioremediation, sandy beach,  Alcanivorax, Cilacap
The Sape Strait Cephalopod Resource and Its Response to Climate Variability Abdul Ghofar
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 2 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (178.531 KB) | DOI: 10.14710/ik.ijms.11.2.59-66

Abstract

Dari tujuh jenis cephalopoda yang terdapat di Selat Sape, setiap tahunnya empat jenis cumi-cumi mendominasi (90%) tangkapan cephalopoda. Perikanan cumi-cumi dideskripsikan, terutama berkaitan dengan terjadinya fluktuasi tangkapan yang besar karena efek-ganda dari kegiatan penangkapan dan variabilitas iklim. Dua jenis alat tangkap utama, Bagan-Prahu dan Jala-Oras distandarisasi sebelum dipakai dalam analisis tangkapan-upaya penangkapan, sedangkan variabilitas iklim diwakili dengan indeks osilasi selatan (SOI). Suatu model dikonstruksidengan cara menginkorporasikan nilai rata-rata tahunan SOI, upaya penangkapan dan tangkapan cumi-cumi. Model ini dapat dipergunakan dalam memperkirakan tangkapan cumi-cumi. Penggunaannya untuk memprediksi dan mengelola perikanan cumi-cumi memerlukan dilakukannya secara teratur (bulanan) monitoring tangkapan, tingkat upaya penangkapan dan SOI. Implikasi hasil kajian ini untuk riset dan pengelolaan dibahas dalam tulisan ini.Kata kunci: cephalopoda, cumi-cumi, variabilitas iklim, ENSO, indeks osilasi selatanOf seven cephalopod species occurring in the Sape Strait, four species of squid constitute 90% of the annual cephalopod catches. The squid fishery is described, with emphasis on its fluctuating catches due to thecombined effects of fishing and climate variability. Two most important fishing gears, ‘Bagan Prahu’ (boat raft net) and ‘Jala Oras’ (light lured payang) were used and standardized in catch and fishing effort analysis. The southern oscillation index (SOI) was used to represent the climate variability component. A model was then developed by means of incorporating the SOI, fishing effort and squid catch. Average annual values of these three components were used to construct the model. The model can be a useful tool for predicting the squid catches. Its use for forecasting and managing the fishery requires regular monitoring the catch, fishing effort and the SOI, preferably monthly. Research and management implication of this finding is discussed.Key words: cephalopod, squid, climate variability, ENSO, southern oscillation index
Genetic Diversity and Demography of Skipjack Tuna (Katsuwonus pelamis) In Southern and Western Part of Indonesian Waters Irwan Jatmiko; Raymon Rahmanov Zedta; Maya Agustina; Bram Setyadji
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 2 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.344 KB) | DOI: 10.14710/ik.ijms.24.2.61-68

Abstract

Skipjack tuna (Katsuwonus pelamis) is highly migratory species that spread from trophic and sub trophic waters. This species can be found in Atlantic, Indian and Pacific oceans. The genetic information of highly migratory species like skipjack tuna is important to support the sustainability of the fisheries. The objectives of this study are to gain information genetic diversity and population structure of exploited species and to understand the population kinship in Indonesian waters. Tissue samples were collected from six locations, i.e.: Sibolga (North Sumatera), Padang (West Sumatera), Binuangeun (Banten), Pacitan (East Java), Lombok (West Nusa Tenggara) and Kupang (East Nusa Tenggara). Microsatellite analysis was done in this study consisting of extraction, purification, polymerase chain reaction (PCR) amplification and electrophoresis. Three loci used for the analysis i.e.: UTD 172, UTD 523 and UTD 535. The results showed that there are two groups from six locations i.e.: group 1: Sibolga and Padang; group 2: Binuangeun, Pacitan Lombok and Kupang. The variance among these two groups is 0.066 with variance 5.441%. This finding in line with Indonesian Fisheries Management Area of 572 (west of Sumatera waters) and 573 (south of Java waters). However, as highly migratory species across nations, the management strategy for skipjack tuna needs collaboration among countries through regional fisheries management authority like Indian Ocean Tuna Commission (IOTC).

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