Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

ILMU KELAUTAN: Indonesian Journal of Marine Sciences

ijms
Website

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.

Arjuna Subject : -

Articles 743 Documents

28 29 30 31 32

Size Composition of Fish By-Catch Species from Industrial Shrimp Trawl Fishery in Nigerian Coastal Waters I O Taiwo; O A Olopade
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 4 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Fish species composition of by-catch in the industrial shrimp trawl fishery in Nigeria was investigated with the Sciaenidae family being the most prevalent by-catch fish species. In order of prevalence Pseudolithus elongatus with a mean weight and length of 15.28g and 86.39mm, respectively and Pseudolithus typus (n= 102) having an average weight of 18.76g and mean length of 88.01mm. Other fish by-catch species include Pseudolithus senegalensis (n= 99, mean weigh = 15.49g, mean length= 88.60mm); Galeoides decadactylus (n= 59, mean weight= 15.26g, mean length= 87.66mm); Pteroscion peli (n= 48, mean weight= 16.05g, mean length = 88.23mm); Drepane africana (n= 33, mean weight= 13.29g, mean length= 45.73mm) and Cynoglossus senegalensis (n= 11, mean weight= 21.78g, mean length = 86.45mm). Despite the small number of Cynoglossus senegalensis, it had the highest weight contribution to the by-catch. Significant (P<0.01) relationship exists between weight and length of fish species. The adjusted R2 of the parameters indicated that 19.4% of the weight gained is accounted for by increase in length of Pseudolithus elongatus; 1.7% in Pseudolithus typus; 31.7% in Pseudolithus senegalensis; 13.7% in Galeoides decadactylus; 7.8% in Pteroscion peli; 57.4% in Drepane Africana; and 48.9% in Cynoglossus senegalensis. The by-catch associated with shrimp trawls should be properly monitored and controlled to reduce the quantity of non-target fish species in their catch. Also, the use of diamond-shaped 44mm mesh size for shrimp should be encouraged or made mandatory for fishers to reduce fish by-catch. Keywords: Shrimp, by-catch, fishery, weight

Respon Molting, Pertumbuhan, dan Mortalitas Kepiting Bakau (Scylla olivacea) yang disuplementasi Vitomolt melalui Injeksi dan Pakan Buatan Yushinta Wijaya; Siti Aslamyah; Zainal Usman
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 4 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Salah satu teknologi produksi kepiting cangkang lunak adalah menggunakan vitomolt untuk menstimulasi molting. Penelitian bertujuan menganalisis respon molting, pertumbuhan, dan mortalitas kepiting bakau setelah diberikan vitomolt melalui injeksi dan pakan buatan. Penelitian dilaksanakan pada bulan Mei - Juli 2011, di Crabs Research Station yang terletak di Kabupaten Maros. Ada tiga perlakuan suplementasi vitomolt, yakni; secara tunggal melalui injeksi, kombinasi injeksi-pakan buatan, dan tanpa suplementasi vitomolt (kontrol), Hasil penelitian menunjukkan bahwa suplementasi vitomolt melalui injeksi dengan dosis 15 µg/g kepiting memberikan respon persentase molting tertinggi, yakni (84,00±5,48%), namun kombinasi injeksi (15 µg/g kepiting) dan pakan buatan (32.375 mg/kg pakan) memberikan respon molting yang lebih cepat. Pada minggu kedua setelah perlakuan, kepiting yang molting pada perlakuan kombinasi adalah 14%, dibandingkan perlakuan lainnya, masing-masing 8% untuk perlakuan secara tunggal melalui injeksi dan 2% untuk kontrol. Suplementasi vitomolt tidak memberikan pengaruh yang signifikan terhadap pertumbuhan setelah molting, namun memberikan pengaruh yang siginifikan pada mortalitas. Mortalitas kepiting yang mendapat suplementasi vitomolt lebih rendah (6-8%) dibandingkan tanpa suplementasi vitomolt (24%). Kata kunci: vitomolt, injeksi, pakan buatan, kepiting cangkang lunak One of the soft shell crab production technology is by application vitomolt to stimulate molting. The study aims to analyze the response of molting, growth, and mortality of mangrove crabs after being given vitomolt through injection and artificial feed. The experiment was conducted between May-July 2011, at Crabs Research Station in Maros Regency. There were two treatments of vitomolt and a control in this experiment, namely single treatment by injection, combination treatment by injection-artificial feed, and without vitomolt supplementation (control), Results showed that supplementation of vitomolt through injection at a dose of 15 mg / g crab had highest percentage of molting (84.00 ± 5.48%), but a combination among injection (15 µg / g of crab) and artificial feed (32 375 mg / kg of feed) give faster molting response. On the second weeks after treatment, there were 14% of crab had been molting in combination treatment, compared other treatments, respectively 8% for a single treatment by injection and 2% for control. Vitomolt supplementation did not have a significant influence on growth after molting, but it gives a significant effect on mortality. Mortality of crabs that got vitomolt supplementation was lower (6-8%) compared without vitomolt supplementation (24%). Key words: vitomolt, Injection, artificial feed, soft shell crab

Karakteristik Bakteri di Perairan Mangrove Pesisir Kraton Pasuruan (Characterization of Bacteria Isolated from Mangrove Coastal Waters of Kraton, Pasuruan) Yahya Yahya; Happy Nursyam; Yenny Risjani; Seomarno Soemarno
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 19, No 1 (2014): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Bakteri memainkan peran penting dalam ekosistem mangrove terutama dalam mengurai searasah daun. Keberadaan bakteri ini sangat dipengaruhi oleh berbagai faktor lingkungan. Penelitian ini bertujuan untuk mengisolasi dan karakterisasi bakteri dari perairan mangrove dari dengan vegetasi yang berbeda yakni Avicennia marina, Rhizophora apiculata, Avicennia alba dan Sonneratia alba. Pengambilan sampel dilakukan di perairan mangrove desa Bulu Kerto Kraton Pasuruan. Proses karakterisasi bakteri dilakukan di laboratorium mikrobiologi Fakultas Kedokteran Universitas Brawijaya Malang. Metode penelitian yang digunakan adalah eksploratif sedangkan parameter uji adalah isolasi bakteri dan uji morfologi, biokimia, serta deteksi pertumbuhan bakteri yang dominan. Hasil penelitian diperoleh 7 isolat bakteri Avicennia marina yaitu Nitrococcus sp., B. subtilis, B. pumilus, Pseudomonas putida. P.stutzeri, Micrococcus luteus, Vibrio sp, 6 isolat bakteri Rhizophora apiculata yaitu B. megaterium, Nitrococcus sp, Staphylococcus sp., P.putida, Lactobacillus sp., B. Subtilis, 8 isolat bakteri Avicennia alba yaitu B.megaterium, B.pumilus, B. subtilis, Nitrococcus sp., Pseudomonas putida, P. stutzeri, B. mycoides, Micrococcus sp.. dan 6 isolat bakteri di Sonneratia alba yaitu Bacillus megaterium, Nitrococcus sp., B.subtilis, Planococcus citreus, B. mycoides, Lactobacillus plantarum. Hasil ini menunjukkan bahwa jenis bakteri dipengaruhi oleh vegetasi mangrove yang ada di suatu perairan. Kata kunci: bakteri, perairan mangrove, vegetasi Bacteria play an important role in the ecosystem, especially in degrading mangrove leaves (litter). The presence of these bacteria is greatly influenced by various environmental factors. This research aims to isolate and characterized bacteria from mangrove waters with different vegetaion namely Avicennia marina, Rhizophora apiculata, Avicennia alba and Sonneratia alba. Characterization of the bacteria were done at microbiological laboratory in Medical Faculty, Brawijaya University. Several tests were done in this explorative research i.e. morphological test, biochemistry, and bacteria growth. The results showed there were 7 isolated bacterias found at Avicennia marina area i.e. Nitrococcus sp, B. subtilis, B. pumilus, Pseudomonas putida. P. stutzeri, Micrococcus luteus, Vibrio sp.; 6 isolated bacterias found at Rhizophora apiculata area i.e. B. megaterium, Nitrococcus sp, Staphylococcus sp., P. putida, Lactobacillus sp., B. subtilis; 8 isolaed bacterias from Avicennia alba area i.e. B. megaterium, B. pumilus, B. subtilis, Nitrococcus sp., Pseudomonas putida, P. stutzeri, B. mycoides, Micrococcus sp., and 6 isolated bacterias from Sonneratia alba area i.e. Bacillus megaterium, Nitrococcus sp, B. subtilis, Planococcus citreus, B. mycoides, Lactobacillus plantarum. These results indicate that the type of bacteria is influenced by the existing mangrove vegetation. Keywords: bacteria, mangrove waters,vegetation

Analisa Stabilitas Garis Pantai di Kabupaten Bangkalan Aries Dwi Siswanto; Widi Agoes Pratikto; Suntoyo Suntoyo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 15, No 4 (2010): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Perairan pantai di Kabupaten Bangkalan merupakan kawasan strategis pengembangan kawasan pesisir, terutama pasca Jembatan Suramadu. Meningkatnya pemanfaatan areal pantai berpotensi menimbulkan gangguan terhadap ekosistem dan keseimbangan pantai, salah satunya dengan konversi tanaman bakau menjadi areal pertambakan maupun pemukiman. Luasan bakau yang rendah memiliki kerentanan relatif tinggi terhadap gelombang dan arus laut yang potensial menyebabkan erosi, sehingga terjadi kemunduran garis pantai (retrogration coast) yang bersifat erosi aktif. One-line model berdasarkan persamaan CERC merupakan salah satu metode pemodelan numerik untuk mengetahui perubahan garis pantai, dengan salah satu parameter utama adalah gelombang. Angin digunakan untuk mendapatkan properties gelombang, dan dilakukan analisa refraksi. Model divalidasi menggunakan citra Landsat. Estimasi model menunjukkan ada perubahan garis pantai pada hampir sebagian besar sel, terutama pada sel 96 dan 316. Garis pantai di lokasi penelitian relatif stabil, kecuali di daerah dermaga Kamal dan sekitar Suramadu.Kata Kunci : Oneline-model, Stabilitas pantai The Shoreline Stability Analysis at Bangkalan Regency. Coastal waters in the Bangkalan regency made up a strategic area for the development of coastal areas, especially after the Suramadu bridge was built. Development of the coastal area cause an increase the utilization of coastal areas in which it might cause to interference of the ecosystem and the beach equilibrium, one of them is change the mangrove ecosystem into both aquaculture and residences. The small mangrove area has a vulnerability is relatively high as compared to the waves and ocean currents causing erosion. As a result, there are retrogration coast that are actively erosion. One-line model based on CERC equation is one of the numerical modeling to know shoreline changes with main parameters is wave. Wind speed used to wave properties for refraction analyze. The validation of model used satellite imagenary. The model prediction showed no changes in the shoreline for the most of cells, especially at 96 and 316 cells Result of model was any shoreline changes The shoreline in this study relatively stable, except in the Kamal dock area and surrounding Suramadu bridge Key words : Oneline-model, Coastal stability

Studi Persporaan Rumput Laut Gracilaria dari Perairan Jepara A. B. Susanto; Rini Pramesti; Nirwani Nirwani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 7, No 2 (2002): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Gracilaria adalah salah satu genus dari algae merah yang mempunyai potensi ekonomi karena kandungan agar-agarnya. Masyarakat mendapatkan alga ini melalui persediaan di alam atau hasil budidaya. Untuk penyediaan bibit budldaya Gracilaria telah dllakukan dengan teknik penyetekan. Namun sesungguhnya, spora yang mempunyai fungsi sebagai alat reprodukslnya dapat dljadikan sebagai bibit. Penelitian ini dilakukan di laboratorium basah Marine Station di Teluk Awur Jepara. Pengamatan dilakukan pada bulan Juni 1996. Metode yang digunakan adalah eksperimen dengan menggunakan Rancangan Acak Lengkap (untuk pengamatan karpospora) dan Split Plot Design berdasarkan Rancangan Acak Lengkap (untuk pengamatan tetraspora). Pengeringan, periode terang gelap, intensitas sinar dan salinitas digunakan pada eksperimen karpospora (n=15). Perbedaan periode terang gelap, sallnitas dan intensitas sinar telah dilakukan pada eksperimen tetraspora (n=3). Hasil penelltian menunjukkan bahwa pengeringan, periode terang gelap, intensitas sinar dan salinitas memberikan pengaruh nyata pada pelepasan karpospora dengan jumlah terbesar karpospora terlepas dicapai selama 15 menit pengeringan, dibawah 500 lux intensltas sinar, selama 9:15 jam periode terang gelap dan dalam salinitas 20 o/oo Kombinasi perlakuan tersebut juga memberikan pengaruh terhadap pelepasan tetraspora yakni dengan perlakuan 250 lux intensitas sinar; 15:9 jam periode tereng gelap dan salinitas 30o/oo.Kata kunci: Gracilaria, karpospora, salinitas, pengeringan, intensitas sinar, periode terang:gelap Gracilaria is a genus of red algae which has economic potential because of its agar contain. The coastal people collect this alga through natural stock or out door culture. Seeds preparation of Gracilaria culture has been done by grafting technique. But actually, the spores which has function as reproduction organ. can be used as seedling. This research was done at the wet laboratory of Marine Station, Awur Bay, Jepara. The observations were done on June 1996. The method used was an experimental with a Completly Randomized Design (for carpospore observation) and Split Plot Design 'based on Completly Randomized Design (for tetrespores observation). Desiccation. photoperiod, light intensity and salinity were used on carpospore experiment (n= 15). Different of photoperiods, salinities and light intensities were used on tetrasopres experiments (n=3). The result showed that desiccation, photoperiod. light intensity and salinity gave the highly significant effect on the carpospores liberation with highly carpospore released on desiccation for 15 minutes. 500 lux of light tntenstty, 9:15 hours LD of photoperiod and 20 o/oo. of salinity. The combination treatments also gave effect on the tetrespores released i.e. on the treatment 250 lux of light intensity, 15:9 hours LD of photoperiod and 30 o/oo of salinity.Keywords: Gracilaria, carpospores, salinity, desiccation, light intensity, photoperiod

Kajian Nutritif Phytoplankton Pakan Alami pada Sistem Kultivasi Massal Antik Erlina; Sri Amini; Hadi Endrawati; Muhamad Zainuri
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 4 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Potensi fitoplankton sebagai pakan alami bagi biota laut di derajat tropic diatasnya telah diketahui. Selanjutnya upaya kultivasi secara massal dilakukan untuk pemenuhan kebutuhan hatchery. Penelitian ini bertujuan untuk mengetahui nilai nutrisi pakan alami Skeletonema costatum, Thallassiosiera sp, Chlorella sp. dan Chaetoceros calcitrans dari hasil produksi kultivasi massal. Laboratorioum Alga Pakan Alami, Balai Besar Pengembangan Budidaya Air Payau Jepara. Isolate 5 ml dari setiap jenis fitoplankton digunakan sebagai sumber pada kultivasi dengan media gallon 20 liter selama 15 hari atau sampai dengan tercapainya puncak populasi. Transfer ke media 1 ton dilakukan setelah puncak populasi tersebut. Kedua jenis media memanfaatkan pupuk dari formula Conwy. Densitas fitoplankton diamati setiap hari dengan menggunakan haemocytometer. Setelah tercapai puncak populasi, maka fitoplankton akan dipanen dengan menyaringnya dengan 2 μm. Hasil panendigunakan untuk analisis nutrisi. Kandungan nutrisi fitoplankton menunjukkan kisaran nilai protein : 21.85 – 37 % ; lemak : 2.41 – 10 % dan karbohidrat : 17 – 21 %. Sedangkan asam lemak menunjukkan kisaran nilai yang cukup tinggi, khususnya pada omega 3 : 0.911 – 3.738 % ; omega 6 : 15.591 – 38.002 % dan omega 9 : 0.292–15.112 %. Nilai nutrisi tersebut tidak berbeda dengan kultivasi laboratoris.Kata kunci : Kandungan Nutritif, Alga, Skeletonema costatum, Thallassiosiera sp, Chlorella sp,. Chaetoceros calcitrans, Kultivasi Massal.The potential mean of the phytoplankton as natural feed for higher tropic level biota in the sea is already known. While the study to mass cultivation as the requirement for natural feed of marine biota larvae wasalready develop in the hatchery, and need to explore into mass cultivation for an alternative purpose. The aim of the study is to determine the nutrition contents of four type phytoplankton, Skeletonema costatum,Thallassiosiera sp, Chlorella sp. and Chaetoceros calcitrans based on mass cultivation. The research was conducted in the Laboratory of Natural Food, Brackishwater Aquaculture Development and Research Center,Jepara. The 5 ml isolate of each phytoplankton were cultivate in the 20 litter gallon for 15 days or until the reach of the density. After the peak density of every phytoplankton, it will transfer into 1 ton media. Eachtreatment was three replicate. Each approach using the enrichment media based on Conwy formula. The density was daily monitor using haemocytometer. After the reach of peak population density, the algae was filtered using 2 μm screen. The algae then store in the refrigerator for nutritive determination. The average nutritive content in the algae show a range value of protein : 21.85 – 37 % ; lipid : 2.41 – 10 % andcarbohydrate : 17 – 21 %. While the lipid acid show a high range value, especially for omega 3 : 0.911 – 3.738 % ; omega 6 : 15.591 – 38.002 % aand omega 9 : 0.292 – 15.112 %. The nutritive value is notdifferent than the one of laboratory cultivation.Key words : Nutritive Contents, Algae, Skeletonema costatum, Thallassiosiera sp, Chlorella sp,. Chaetoceros calcitrans, mass cultivation.

Biopropeksi Bakteri Simbion Dari Gastropoda Conus miles Terhadap Strain Bakteri IMDR (Multi Drug Resistant) Delianis Pringgenies
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 14, No 1 (2009): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Keberadaan bakteri yang berasosiasi dengan moluska laut telah memungkinkan penggunaan mikro-organisme tersebut sebagai sumber senyawa bioaktif yang baru termasuk senyawa antimikroba khususnya dalam menangani strain strain yang resisten terutama multi-drugsresistant (MDR). Penelitian ini bertujuan untuk mengisolasi bakteri dari gastropoda Conus miles, menskrining bakteri simbionnya yang berpotensi sebagai antibakteri terhadap strain bakteri MDR. Sampling moluska dilakukan di perairan pulau Ternate, Maluku. Selanjutnyadilakukan isolasi bakteri, skrining bakteri penghasil senyawa anti-MDR, uji antibakteri moluska, isolasi bakteri patogen klinik (MDR), uji sensitifitas antibakteri dan analisis sekuen 16S rDNA. Hasilpenelitian memperlihatkan bahwa bakteri simbion Conus miles yang dapat menghambat bakteri MDR berjumlah 16 isolat. Sebanyak 9 isolat memiliki kemampuan menghambat beberapa jenis bakteri MDR, sedangkan sebanyak 7 isolat hanya dapat menghambat satu jenis bakteri MDR. Berdasarkan besarnya zona hambatan yang dibentuk dan kemampuan daya hambatan maka dipilih satu isolat terbaik untuk uji lanjutan, yaitu isolat TCM 6.1. Hasil identitlkasi I6S rDNA menunjukkan bahwa isolat TCM 6.1 memiliki kekerabatan terdekat dengan bakteri Pseudoalteromonas sp. dengan tingkat homologi 99 %. Kata kunci : screening, bakteri simbiotik, Conus miles, antibacterial, multi-drug resistant

Relationship Between Light Intensity and Abundance of Dinoflagellate in Samalona Island, Makassar (Keterkaitan Intensitas Cahaya dan Kelimpahan Dinoflagellate di Pulau Samalona, Makassar) Albida Rante Tasak; Mujizat Kawaroe; Tri Prartono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 20, No 2 (2015): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Cahaya merupakan salah satu faktor penting dalam proses fotosintesis dinoflagellate dan pertumbuhan variabilitas harian. Intensitas cahaya memengaruhi aktivitas fotosintesis dan kelimpahan dinoflagellate. Studi ini bertujuan untuk menunjukkan pola kecenderungan kelimpahan dinoflagellate dan klorofil serta lama penyinaran terhadap kelimpahan dinoflagellate di Perairan Pulau Samalona. Penelitian dilakukan dengan menginkubasi sampel dinoflagellate kedalam botol sejak pagi-sore hari dengan inkubasi waktu pengamatan setiap 2 jam dengan ulangan sebanyak 3 kali. Pengambilan mencakup kelimpahan dinoflagellate, nutrient dan intensitas cahaya dalam perairan. Analisis data menggunakan regresi linear sederhana. Hasil penelitian menunjukkan bahwa nilai intensitas cahaya berkisar antara 50–3000 lux; kelimpahan dinoflagellate berkisar antara 9–1105 sel.L-1, dan kandungan klorofil a lebih dominan dengan kisaran 0.00069–0.50321 µg.L-1. Intensitas cahaya mempengaruhi kelimpahan dinoflagellate, namun pengaruh kandungan nutrient sangat kecil terhadap kelimpahan dinoflagellate. Pola kelimpahan dinoflagellate bervariasi dari pagi hingga sore hari yang dipengaruhi oleh intensitas cahaya dalam melakukan proses fotosintesis serta kondisi lingkungan lain seperti klorofil a dan nutrient. Hasil penelitian ini memberikan informasi variasi temporal harian kelimpahan dinoflagellate di Pulau Samalona, Makassar.

Distribution of 90Sr in the High Seas and Coastal Regions of Korea-Japan-Russia-China Muslim Muslim
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 3 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Distribusi 90Sr di daerah laut lepas dan pantai Korea-Jepang-Rusia-China telah diteliti sejak 30 Juni sampai 2 Agustus 2000. Pengambilan sampel permukaan air laut dilakukan di Laut China Timur, Laut Jepang (LautTimur), Laut Okhotsk dan Barat laut Samudera Pacific. Salinitas, temperatur dan konsentrasi 90Sr bervariasi dan tidak menunjukkan saling berhubungan. Temperatur lebih didominasi oleh pengaruh posisi lintang. Konsentrasi 90Sr banyak dipengaruhi oleh beberapa faktor seperti sumber limbah buangan radioaktif dan faktor fisika. Dilaut Jepang distribusi konsentrasi 90Sr lebih didominasi oleh pengaruh jarak dari tempat sumber pembuangan limbah radioaktif, tetapi di lokasi-lokasi lain dipengaruhi oleh faktor kondisi fisik.Kata kunci: 90Sr, laut lepas, daerah pantai, faktor fisika.Distribution of 90Sr in the high seas and coastal regions of Korea-Japan-Russia-China have been measured from 30 June 2000 to 2 August 2000. The surface seawaters were collected from East China Sea, Japan Sea (East Sea), Okhotsk Sea and Northwest Pacific Ocean. Salinity, temperature and 90Sr concentration were variable, and did not show correlation each others. The temperature levels dominantly influenced by latitude effect position. The 90Sr activities ranged from not detectable to 2.22 mBq/l (mean: 1.18, n:23). The distribution of 90Sr concentrations were more uniform in the coastal regions than in the high seas regions. The concentration of 90Sr in this study area were caused by some factors such as from source radioactive waste discharge and physical factors condition. The distribution 90Sr in Japan Sea generally was influenced by distance factor from radioactive waste discharge, but the other locations were influenced by physical factors condition.Key words: 90Sr, high seas, coastal regions, physical factors.

Redefining Dispersal Boundaries of Siganus fuscescens In The Coral Triangle Area Ni Putu Dian Pertiwi; Nur Ismu Hidayat; Chloe Henderson; I Nyoman Giri Putra; Andrianus Sembiring
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 1 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The increasing demand of fish in the Coral Triangle Area has led to overexploitation of some species of fishes. One of the commercial fishes, which is also known to be the source of food and income for local communities, is the Mottled Spinefoot (Siganus fuscescens). Population studies on this species are important in order to manage sustainable stock populations. Genetic variation of the mitochondrial DNA was analyzed to examine the population structure of Siganus fuscescens in Indonesia, as part of the Coral Triangle Area. In total, 789 basepairs of control region mtDNA sequences were determined from 133 specimens collected from six localities, including Seribu Islands (n=27), Karimunjawa (n=19), Komodo (n=39), Selayar (n=20), Lembeh (n=19) and Luwuk (n=9). From the data, 27 variable sites and 24 haplotypes were detected, with most of the haplotypes unique to each location. Haplotype data show that one haplotype was shared among all populations, three haplotypes were shared between two populations (Komodo & Selayar; Lembeh & Seribu; Komodo & Karimunjawa), and 20 were unique to a single population. Haplotype diversity (h=0.444) and nucleotide diversity (π=0.00165) were low. The diversity result, i.e. the ΦST value (0.0658, P < 0.0001) revealed genetic structure in S. fuscescens populations in Indonesia. A non-dispersal strategy led to restricted gene flow and genetic structuring in S. fuscescens. However, both the neutrality test and the mismatch distribution indicated that S. fuscescens might have been in populations at demographic equilibrium, with restriction to the population expansion. Although indicating unexpected minor population structure pattern, the overall result still suggest the management of this species population as a single unit across Indonesia.

Page 30 of 75 | Total Record : 743

28 29 30 31 32

Filter by Year

2001 2025

Filter By Issues

All Issue Vol 30, No 3 (2025): Ilmu Kelautan Vol 30, No 2 (2025): Ilmu Kelautan Vol 30, No 1 (2025): Ilmu Kelautan Vol 29, No 4 (2024): Ilmu Kelautan Vol 29, No 3 (2024): Ilmu Kelautan Vol 29, No 2 (2024): Ilmu Kelautan Vol 29, No 1 (2024): Ilmu Kelautan Vol 28, No 4 (2023): Ilmu Kelautan Vol 28, No 3 (2023): Ilmu Kelautan Vol 28, No 2 (2023): Ilmu Kelautan Vol 28, No 1 (2023): Ilmu Kelautan Vol 27, No 4 (2022): Ilmu Kelautan Vol 27, No 3 (2022): Ilmu Kelautan Vol 27, No 2 (2022): Ilmu Kelautan Vol 27, No 1 (2022): Ilmu Kelautan Vol 26, No 4 (2021): Ilmu Kelautan Vol 26, No 3 (2021): Ilmu Kelautan Vol 26, No 2 (2021): Ilmu Kelautan Vol 26, No 1 (2021): Ilmu Kelautan Vol 25, No 4 (2020): Ilmu Kelautan Vol 25, No 3 (2020): Ilmu Kelautan Vol 25, No 2 (2020): Ilmu Kelautan Vol 25, No 1 (2020): Ilmu Kelautan Vol 24, No 4 (2019): Ilmu Kelautan Vol 24, No 3 (2019): Ilmu Kelautan Vol 24, No 2 (2019): Ilmu Kelautan Vol 24, No 1 (2019): Ilmu Kelautan Vol 23, No 4 (2018): Ilmu Kelautan Vol 23, No 3 (2018): Ilmu Kelautan Vol 23, No 2 (2018): Ilmu Kelautan Vol 23, No 1 (2018): Ilmu Kelautan Vol 22, No 4 (2017): Ilmu Kelautan Vol 22, No 3 (2017): Ilmu Kelautan Vol 22, No 2 (2017): Ilmu Kelautan Vol 22, No 1 (2017): Ilmu Kelautan Vol 21, No 4 (2016): Ilmu Kelautan Vol 21, No 3 (2016): Ilmu Kelautan Vol 21, No 2 (2016): Ilmu Kelautan Vol 21, No 1 (2016): Ilmu Kelautan Vol 20, No 4 (2015): Ilmu Kelautan Vol 20, No 3 (2015): Ilmu Kelautan Vol 20, No 2 (2015): Ilmu Kelautan Vol 20, No 1 (2015): Ilmu Kelautan Vol 19, No 4 (2014): Ilmu Kelautan Vol 19, No 3 (2014): Ilmu Kelautan Vol 19, No 2 (2014): Ilmu Kelautan Vol 19, No 1 (2014): Ilmu Kelautan Vol 18, No 4 (2013): Ilmu Kelautan Vol 18, No 3 (2013): Ilmu Kelautan Vol 18, No 2 (2013): Ilmu Kelautan Vol 18, No 1 (2013): Ilmu Kelautan Vol 17, No 4 (2012): Ilmu Kelautan Vol 17, No 3 (2012): Ilmu Kelautan Vol 17, No 2 (2012): Ilmu Kelautan Vol 17, No 1 (2012): Ilmu Kelautan Vol 16, No 4 (2011): Ilmu Kelautan Vol 16, No 3 (2011): Ilmu Kelautan Vol 16, No 2 (2011): Ilmu Kelautan Vol 16, No 1 (2011): Ilmu Kelautan Vol 15, No 4 (2010): Ilmu Kelautan Vol 15, No 3 (2010): Ilmu Kelautan Vol 15, No 2 (2010): Ilmu Kelautan Vol 15, No 1 (2010): Ilmu Kelautan Vol 14, No 4 (2009): Jurnal Ilmu Kelautan Vol 14, No 3 (2009): Jurnal Ilmu Kelautan Vol 14, No 2 (2009): Jurnal Ilmu Kelautan Vol 14, No 1 (2009): Jurnal Ilmu Kelautan Vol 13, No 4 (2008): Jurnal Ilmu Kelautan Vol 13, No 3 (2008): Jurnal Ilmu Kelautan Vol 13, No 2 (2008): Jurnal Ilmu Kelautan Vol 13, No 1 (2008): Jurnal Ilmu Kelautan Vol 12, No 4 (2007): Jurnal Ilmu Kelautan Vol 12, No 3 (2007): Jurnal Ilmu Kelautan Vol 12, No 2 (2007): Jurnal Ilmu Kelautan Vol 12, No 1 (2007): Jurnal Ilmu Kelautan Vol 11, No 4 (2006): Jurnal Ilmu Kelautan Vol 11, No 3 (2006): Jurnal Ilmu Kelautan Vol 11, No 2 (2006): Jurnal Ilmu Kelautan Vol 11, No 1 (2006): Jurnal Ilmu Kelautan Vol 10, No 4 (2005): Jurnal Ilmu Kelautan Vol 10, No 3 (2005): Jurnal Ilmu Kelautan Vol 10, No 2 (2005): Jurnal Ilmu Kelautan Vol 10, No 1 (2005): Jurnal Ilmu Kelautan Vol 9, No 4 (2004): Jurnal Ilmu Kelautan Vol 9, No 3 (2004): Jurnal Ilmu Kelautan Vol 9, No 2 (2004): Jurnal Ilmu Kelautan Vol 9, No 1 (2004): Jurnal Ilmu Kelautan Vol 7, No 3 (2002): Jurnal Ilmu Kelautan Vol 7, No 2 (2002): Jurnal Ilmu Kelautan Vol 7, No 1 (2002): Jurnal Ilmu Kelautan Vol 6, No 4 (2001): Jurnal Ilmu Kelautan More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota semarang,

Jawa tengah

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email -

Phone -

Journal Mail Official -

Editorial Address -

Location Kota semarang, Jawa tengah INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota semarang,

Jawa tengah

INDONESIA