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ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Published by Universitas Diponegoro
ISSN : 08537291     EISSN : 24067598     DOI : -
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.
Articles 513 Documents
Kandungan Lipid Total Nannochloropsis oculata Pada Kultur dengan Berbagai Fotoperiod (Total Lipid Content of Culture of Nannochloropsis oculata at Different Photoperiod) Widianingsih, Widianingsih; Hartati, Retno; Hadi, Endrawati; Iriani, Valentina R
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (90.068 KB) | DOI: 10.14710/ik.ijms.17.3.119-124

Abstract

Fotoperiod memainkan peranan penting dalam proses fotosintesis pada mikroalga Nannochloropsis oculata. Fotoperiod akan mempengaruhi kadar total lipid pada berbagai jenis mikroalga. Penelitian ini bertujuan untuk determinasi kandungan lipid total mikroalga Nannochloropsis oculata yang dikultur pada berbagai kondisi fotoperiod Rancangan acak lengkap dengan tiga ulangan diterapkan pada penelitian ini. Perlakuan pada penelitian ini adalah fotoperiod 4 jam terang-20 jam gelap, 8 jam terang-16 jam gelap, 12 jam terang-12 jam gelap, dan 24 jam terang. N. oculata dikultur pada erlenmeyer 250 mL dengan sistem aerasi kontinyu dan pencahayaan 3000 lux, salinitas 33 ppt dan medium Conway. Hasil penelitian menunjukkan bahwa kandungan lipid total pada N. oculata tertinggi ditemukan pada perlakuan fotoperiod 12 jam terang-12 jam gelap) (31,8?3,03%-dw) dan kemudian diikuti pada fotoperiod 8jam terang - 16 jam gelap (25,2?2,19%-dw) dan fotoperiod 24 jam terang (23,2 %-dw). Pada perlakuan fotoperiod 8 jam terang-16 jam gelap dan fotoperiod 12 jam terang-12 jam gelap pada media pemeliharaan N.oculata menunjukkan hasil kadar lipid total yang lebih besar pada fase stasioner dibandingkan dengan eksponensial.Kata kunci: Nannochloropsis oculata, total lipid, fotoperiodPhotoperiod has important role on the photosynthesis process of microalgae Nannochloropsis oculata. Photoperiod also influences on total lipid content of various microalgae. This research has purpose to examine the effect of nutrient phosphate and nitrate composition to the total lipid content of N. oculata belong to class Eustigmatophyceae. There were four treatments of photoperiod as follows; (a) photoperiod A (4:20 hour light:dark);(b) photoperiod B (8:16 hour light:dark); photoperiod C (12:12 hour light:dark); (and (d) photoperiod D (24 hour light). There were three replicates for each treatment. The volume of culture medium was 250 mL for each treatment with continuously aeration and illumination (3000 lux). According to the research, the highest total lipid content of N. oculata had been found on the treatment of photoperiod 12:12 hour light:dark 31,8 ? 3,03 %-dw, and then followed by photoperiod 8:16 hour light dark as amount 25,2 ? 2,19 %-dw and 24 hour light (23,2 ? 1,99%-dw), and then followed by photoperiod 24 hour light. Differences of photoperiod 8:16 hour light:dark and photoperiod 12:12 hour light:dark on culture medium of N. oculata showed result that there were differences of total lipid content on the stationary and exponential phase. The highest percentage of total lipid was fund in cell of N. oculata grown under treatment of photoperiod 12:12 hour light:dark. The treatment of photoperiod 8:16 hour light:dark and 12:12 hour light:dark in the N. oculata culture showed result that the total lipid content on stationary phase was greater than exponential phase.Key words: Nannochloropsis oculata, total lipid, photoperiod
Laju Pertumbuhan Spesifik dan Kandungan Asam Lemak pada Mikroalga Spirulina platensis, Isochrysis sp. dan Porphyridium cruentum (Specific Growth Rate and Fatty Acid Content of Microalgae Spirulina platensis, Isochrysis sp. and Porphyridium cruentum) Kawaroe, Mujizat; Pratono, Tri; Rachmat, Ayi; Sari, Dahlia Wulan; Augustine, Dina
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (118.695 KB) | DOI: 10.14710/ik.ijms.17.3.125-131

Abstract

Mikroalga merupakan pabrik sel yang mampu mengkonversi karbondioksida menjadi biofuel potensial, makanan serta bioaktif yang bernilai tinggi dengan bantuan sinar matahari. Tujuan penelitian ini adalah untuk menganalisis laju pertumbuhan spesifik dan kandungan asam lemak 3 jenis mikroalga yaitu S. platensis, Isochrysis sp., P. cruentum. Kultivasi mikroalga murni dilakukan di laboratorium selama 8 hari dengan media Guillard/F2. Proses ekstraksi dilakukan dengan menggunakan metode sokletasi serta pelarut n-heksan. Profil dan kandungan asam lemak mikroalga dilakukan dengan menggunakan kromatografi gas spektrofotometri massa (GC-MS). Hasil penelitian menunjukkan bahwa kepadatan mikroalga tertinggi terdapat pada hari ke-8. Laju pertumbuhan spesifik tertinggi terdapat pada P. cruentum, yaitu 0,37/hari. Spesies mikroalga yang memiliki total konsentrasi asam lemak paling tinggi adalah Isochrysis sp., (96,18%) dan yang terrendah adalah P. cruentum (34,73%). P. cruentum memiliki kadar MUFA tertinggi. Isochrysis sp. memiliki kadar asam lemak tidak jenuh ikatan poli (PUFA) yang lebih tinggi daripada S. platensis.Kata kunci: mikroalga, S. platensis, Isochrysis sp., P. cruentum, asam lemak, pertumbuhan spesifikMicroalgae is cell factory that is capable of converting carbon dioxide to potential biofuel, foods and high-value bioactive with sunlight assistance. The purpose of this study is to analyze the specific growth rate and fatty acid content of S. platensis, Isochrysis sp., P. cruentum. Cultivation of pure microalgae is conducted in laboratory for 8 days with media Guillard/f2. Extraction process is conducted using soxhletation method and hexane as the solvent. Fatty acid profile and content in microalgae is performed using gas chromatography mass spectrometry (GC-MS). The highest density of microalgae found at day 8 cultivation. The highest specific growth rate found in P. cruentum in 0.37/day. The highest and lowest total of fatty acid concentration found in Isochrysis sp. (96.18%) and P. cruentum (34.73%) respectively. P. cruentum has the highest levels of saturated fatty acids (SFA), whereas S. platensis has the highest levels of mono unsaturated fatty acid (MUFA). Isochrysis sp. has lower levels poly unsaturated fatty acid (PUFA) than S. platensis.Key words: microalgae, S. platensis, Isochrysis sp., P. cruentum, growth rate, fatty acid
Akurasi Tematik Peta Substrat Dasar dari Citra Quickbird (Studi Kasus Gusung Karang Lebar, Kepulauan Seribu, Jakarta) (Thematic Accuracy of Bottom Substrate Map from Quickbrid Imagery (Case study: Gusung Karang Lebar, Kepulauan Seribu, Jakarta)) Selamat, Muhammad Banda; Jaya, Indra; Siregar, Vincentius P; Hestirianoto, Totok
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (2144.187 KB) | DOI: 10.14710/ik.ijms.17.3.132-140

Abstract

Salah satu kelemahan metode koreksi kolom air adalah dapat memunculkan bias dalam estimasi rasio koefisien attenuasi. Bias ini berkontribusi pada nilai akurasi tematik peta substrat dasar. Studi ini menggunakan pendekatan zonasi geomorfologi untuk meningkatkan akurasi tematik peta substrat yang dihasilkan dari metode koreksi kolom air. Nilai piksel citra Quickbird dikonversi ke radiansi dan dilanjutkan dengan koreksi kolom air untuk menghasilkan peta substrat dasar dengan tiga tema ekosistem, yaitu ekosistem pantai berpasir dengan substrat dominan pasir, ekosistem lamun dan terumbu karang. Data lapangan dikelompokkan menggunakan metode Bray curtis dan menjadi dasar bagi reklasifikasi. Profil geomorfologi pada citra satelit disadap dari gabungan kanal hijau dan merah, mengacu pada hasil survei batimetri. Pendekatan kombinasi ini terbukti dapat meningkatkan akurasi tematik peta substrat dasar hingga lebih dari 20%.Kata kunci: quickbird, substrat dasar, akurasi tematikBias may occur on attenuation coefficient ratio estimated from water column correction method. This bias then contribute to thematic accuracy of bottom substrate images. This study used geomorphologic spatial zonation to improve thematic accuracy of bottom substrate maps that produced from water column correction method. Quickbird pixel values were converted to the top of atmosphere radiance and followed by water column correction to make bottom substrate map with three themes ecosystem i.e. sandy ecosystem, seagrass ecosystem and coral reef ecosystem. Field data were grouped using Bray Curtis method and become basis of image reclassification. Geomorphological profile was extracted from green and red composite images, refer to a bathymetric survey. These combined approaches were significantly proved to improve thematic accuracy up to more than 20%.Key words: quickbird, bottom subtrate, thematic accuracy
Pengaruh Salinitas Media Berbeda Terhadap Pertumbuhan Keong Macan (Babylonia spirata L.) Pada Proses Domestikasi (Effect of Different Media Salinity on the growth of Spotted Babylon (Babylonia spirata L.) During Domestication Process) Rachmawati, Diana; Hutabarat, Johannes; Anggoro, Sutrisno
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (109.16 KB) | DOI: 10.14710/ik.ijms.17.3.141-147

Abstract

Proses domestikasi sangat diperlukan dalam upaya optimalisasi budidaya keong macan (Babylonia spirata L., Neogastropoda, Buccinidae), sehingga kondisi optimum dari media yang sesuai dengan kebutuhan hidup (ekofisiologis) diketahui. Dalam media, salinitas merupakan salah satu faktor fisiologis yang berpengaruh terhadap pemanfaatan pakan dan pertumbuhan. Tujuan penelitian adalah mengkaji pengaruh salinitas? media yang berbeda dan salinitas media terbaik terhadap tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong Macan pada proses domestikasi. Keong Macan diperoleh dari perairan Jepara. Pakan yang diberikan adalah ikan Juwi (Anadontostoma chucunda) sebanyak 5 % bobot biomass/hari. Metode rancangan acak lengkap diterapkan dalam penelitian ini dengan perlakukan media salinitas 27 ppt (hipo-osmotik), 31 ppt (iso-osmotik) dan 35 ppt (heperosmotik). Hasil penelitian menunjukkan bahwa salinitas media yang berbeda pada proses domestikasi berpengaruh sangat nyata (P<0.01) terhadap tingkat kerja osmotik, pertumbuhan, efisiensi pemanfaatan pakan namun tidak berpengaruh nyata (P>0.05) terhadap kelulushidupan keong macan. Media isoosmotik dengan salinitas 31 ppt merupakan media terbaik bagi tingkat kerja osmotik, pertumbuhan,? kelulushidupan dan efisiensi pemanfaatan pakan keong macan. Kualitas air media selama penelitian masih dalam kisaran yang layak bagi domestikasi keong macan.Kata kunci: Keong Macan, Babylonia spirata L., salinitas, domestikasi, tingkat kerja osmotikDomestication process is important factor prior to Spotted Babylon (Babylonia spirata L., Neogastropoda, Buccinidae) culture. The optimum condition of the media in accordance with the necessities of life (eco physiology) spotted Babylon for domestication is not been understood, therefore the present work was aimed to examine the influence of different media salinity on the level of osmotic performance, growth, survival rate and feed efficiency. Spotted Babylon were collected from Jepara waters and were fed with juwi fish (Anadontostoma chucunda) for 5% biomass weight/day. Three salinity medium were applied, ie. Hypo osmotic (27 ppt ), iso osmotic (31 ppt), and hyper osmotic (35 ppt). The result showed that salinity affected very significantly (P<0,01) on the level of osmotic work (TKO), growth, feed utilization efficiency but no effect (P>0,05) on survival rate of Spotted Babylon (B. spirata L .). The isoosmotic media (31 ppt) is the best for osmotic performance, growth, survival rate, and feed utilization efficiency spoted Babylon (B. spirata L .). Water quality media during the study were still within the appropriate range for the domestication of Spotted Babylon (B. spirata L.).Key words: Spotted Babylon, Babylonia spirata L., salinity, domestication, osmotic work
Padatan Tersuspensi Total di Perairan Selat Flores Boleng Alor dan Selatan Pulau Adonara Lembata Pantar (Total Suspended Solids in the Flores Boleng Alor Straits and In the South of Adonara Lembata Pantar Islands) Helfinalis, Helfinalis; Sultan, Sultan; Rubiman, Rubiman
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (136.565 KB) | DOI: 10.14710/ik.ijms.17.3.148-153

Abstract

Kandungan padatan tersuspensi total di Selat Flores Boleng Alor dan Selatan Pulau Adonara Lembata Pantar telah diteliti pada bulan Juli 2011 yang mewakili musim timur dengan menggunakan Kapal Riset Baruna Jaya VIII. Perairan ini dipilih karena mempunyai sumber daya wisata laut berupa lintasan Cetacean dan pesisir pantai yang indah bernilai ekonomis. Air laut di permukaan dan pada kedalaman termoklin diambil dengan menggunakan Rosette water Sampler. Sampling dilakukan di 18 titik stasiun. Hasil penelitian menunjukan sebaran nilai kandungan padatan tersuspensi total secara keseluruhan masih lebih tinggi perairan Maluku Utara, lebih rendah dibandingkan dari perairan sekitar Selat Makasar, Barat Kalimatan dan hampir sama dengan perairan Sulawesi? Utara. Nilai di lokasi penelitian ini juga lebih tinggi dari 20 mg/l dari nilai toleransi baku mutu yang telah ditetapkan oleh Kementerian Lingkungan Hidup. Nilai padatan tersuspensi total yang lebih rendah dari 20 mg/l kini sangat bermanfaat bagi kehidupan biota laut yang berada di sekitar perairan yang diteliti.Kata kunci: padatan tersuspensi total, Flores, Boleng, AlorA study on total suspended solid around Selat Flores Boleng Alor straits and southern of Adonara Lembata Pantar Islands waters was conducted during July 2011 as representative of the east season using R.V. Baruna Jaya VIII. The locations were selected due to the fact that they have high potencies of marine tourism on the tracking of Cetacean. The water samples were collected using Rosette Water Sampler on the surface and termocline water at 18 stations respectively. The results showed that padatan tersuspensi total concentration at all stations were higher then area Maluku Utara, similar then North Sulawesi, lower than other area of Makasar Strait, West Kalimatan waters and also higher than tolerable 20 mg/l limited values of padatan tersuspensi total in the water according to Ministry of Environmental (KLH). It gives benefit for marine living resources.Key words: total suspended solid, Flores, Boleng, Alor
Struktur Komunitas Ikan Karang di Perairan Kendari (Community Structure of Coral Reef Fishes at Kendari Waters) Adrim, Muhammad; Harahap, Syawaludin Alisyahbana; Wibowo, Kunto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (4505.961 KB) | DOI: 10.14710/ik.ijms.17.3.154-163

Abstract

Keberadaan ikan karang merupakan salah satu bioindikator terhadap kondisi terumbu karang yang baik. Penelitian ikan karang di perairan Kendari bertujuan untuk mengetahui komposisi jenis, kelimpahan, sebaran, dan struktur komunitas ikan karang di perairan tersebut. Pengumpulan data dilakukan bulan Juli 2011 pada lima lokasi di bagian utara dan selatan Kendari. Data dihimpun dengan menggunakan teknik Underwater Visual Census (UVC) dan metode transek (Line Intersept Transect, LIT) dengan peralatan SCUBA. Total jenis ikan karang terkumpul sebanyak 111 jenis yang mewakili 24 famili, terdiri dari 31 jenis ikan target (ikan konsumsi), 17 jenis ikan indikator (indicator species), dan kelompok major 63 jenis. Kelornpok ikan pangan (target) yang dominan; Caesio cuning, Siganus vulpinus dan Ctenochaetus striatus. Jenis yang paling dominan dari ikan indikator adalah Chaetodon octofasciatus. Sedangkan kelompok lainnya (major yang dominan) adalah Pomacentrus smithii, Chrysiptera rollandi, Chrysiptera springeri, dan Pomacentrus alexanderae. Nilai Indeks keanekaragaman berkisar 1,36? 3,23. Indeks dominasi Margalef (d) berkisar 4,74?8,66. Indeks kemerataan Pielou (J?=H?/logeS) diperololeh pada kisaran 0,38?0,81 . Hasil analisis kluster pada matrik kesamaan Bray-Curtis 37 % diperoleh dendrograrn yang menunjukkan dua pengelompokan stasiun. Berdasarkan ordinasi sampel dengan MDS diperoleh dari kesamaan (stress= 0) dengan jelas menunjukkan dua komunitas yang berbeda. Hasil penelitian ini diharapkan dapat menjadi masukan sebagai data dasar untuk pengelolaan daerah pesisir bagi pemerintahan daerah (PEMDA).Kata kunci: ikan karang, struktur komunitas, indeks ekologi, perairan Kendari.Coral reef Fishes is one of bio-indicators for good condition coral reef ecosystem. A study on coral reef fishes in the Kendari waters was aimed to find out species composition, abundance, distribution and community structure of coral reef fishes in that area. The study was conducted in July 2011 at five locations on the northern and southern part of Kendari waters. Data were gathered using SCUBA with underwater visual census (UVC) and line transect (Line Intersept Transect, LIT methods). A total of 111 species of 24 families of coral reef fishes were gathered, consisted of? 31 species of target fishes, 17 indicator species and 63 species of major group fishes. The target fishes were dominated by Caesio cuning, Siganus vulpinus and Ctenochaetus striatus. Indicator species was dominated by Chaetodon octofasciatus and major group fishes were dominated by Pomacentrus smithii, Chrysiptera rollandi, Chrysiptera springeri, and Pomacentrus alexandera.The Shannon-Wiener diversity indices were ranged between 1.36 and 3.23, the Margalefs index of richness ranged from 4.74 and 8,66 while Evenness indices of Pielou were ranged from 0.38 to 0.81. The cluster analysis of Bray Curtis index of simmilarity showed two groups on the dendogram at 37% similarity level, while the multidimensional similarity analysis (stress = 0) was also shown two different communities. The result of the study could be useful to baseline data to coastal management area to local government authority (PEMDA).Key words: coral reef fish, community structure, ecology index, Kendari waters
Isolasi dan Seleksi Bakteri Penghasil Enzim Ekstraseluler (proteolitik, amilolitik, lipolitik dan selulolitik) yang Berasal dari Sedimen Kawasan Mangrove (Isolation and Selection of Extracellular Enzyme Producing Bacteria Originating from Mangrove Sedimen Setyati, Wilis Ari; Subagiyo, Subagiyo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (442.341 KB) | DOI: 10.14710/ik.ijms.17.3.164-169

Abstract

Bioremediasi tambak udang memegang peranan penting dalam upaya membersihkan tambak dari bahan pencemar internal yang dihasilkan selama proses budidaya itu sendiri. Proses budidaya udang merupakan kegiatan yang potensial menghasilkan limbah organik terutama berasal dari sisa pakan dan hasil ekskreta (feses). Bakteri heterotrofik memiliki kemampuan untuk menghasilkan enzim ekstraseluler yang diperlukan untuk bioremediasi limbah organik. Penelitian ini ditujukan untuk mengisolasi bakteri heterotrofik yang berasal dari ekosistem mangrove utuk dikembangkan sebagai agensia bioremediasi limbah organik pada tambak udang. Sedimen mangrove diperoleh dari kawasan mangrove Segara Anakan- Cilacap dan kawasan Mangrove Kaliuntu-Kabupaten Rembang. Isolasi dilakukan dengan metode agar tuang menggunakan media Zobell agar. Pengujian aktivitas proteolitik, amilolitik, lipolitik dan selulolitik dilakukan dengan metode diffusion agar menggunakan paper disk berturut-turut pada media Zobell agar yang diperkaya dengan 1% skim milk, 1% amilum, dan 1% tween 80 dan 1 % CMC. Diameter zone hidrolitik digunakan sebagai dasar untuk melakukan seleksi. Hasil penelitian diperoleh 35 isolat (16 isolat dari Kaliuntu ? Rembang dan 19 isolat dari Segoro Anakan ? Cilacap). Jumlah isolat yang mempunyai kemampuan menghasilkan enzim ekstraseluler berturut-turut 33 isolat dengan aktivitas proteolitik 25 isolat dengan aktivitas amilolitik, 29 isolat dengan aktivitas lipolitik, dan 12 isolat dengan aktivitas selulolitik. Hasil seleksi berdasarkan diameter zone hidrolitik diperoleh 10 isolat yang potensial untuk dikembangkan sebagai agensia bioremediasi.Kata kunci: proteolitik, amilolitik, lipolitik, selulolitik, mangrove, bioremediasi, tambak udangBioremediation of shrimp pond plays an important role in the effort to clean up the internal pollutants of pond produced during the cultivation process. Shrimp farming produces mainly organic waste from food remains and the excreta. Heterotrophic bacteria have the ability to produce extracellular enzymes required for the bioremediation of organic waste. This study aimed to isolate heterotrophic bacteria from mangrove ecosystem to be developed as agents of bioremediation of organic wastes in shrimp ponds. This was done by isolating and selecting bacteria producing extracellular enzymes of proteolytic, amylolitic, lipolytic and cellulolytic from mangrove sediments collected from the mangrove area of Segara Anakan at District of Cilacap and Kaliuntu, district of Rembang. Isolations were done by pour-plate method using a Zobell agar medium. Assays for proteolytic, amilolytic, lipolytic and cellulolytic activity were performed using paper disk on Zobell agar medium enriched respectively with 1% skim milk, 1% soluble starch, 1% tween 80 and 1% CMC. Hydrolytic zone diameter was used as the basis for selection of enzymatic activities. The results obtained was 35 isolates (16 isolates from Kaliuntu?Rembang dan 19 isolate froms Segara Anakan ? Cilacap), consisting of 33 proteolytic enzyme, 25 amilolytic enzyme, 29 lipolytic enzyme and 12 isolates cellulolytic producing enzyme. Based on hydrolytic zone diameter were selected 9 isolates which potential to be developed as bioremediation agent.Key words: Bioremediation, proteolytic, amilolytic, lipolytic, selulolytic
Status Rekruitmen Karang Scleractinia di Perairan Kendari Sulawesi Tenggara (Recruitment Status of Coral Scleractinian In Kendari Waters Southeast Sulawesi) Palupi, Ratna Diyah; Siringoringo, Ricoh Managor; Hadi, Tri Aryono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (287.866 KB) | DOI: 10.14710/ik.ijms.17.3.170-175

Abstract

Proses rekruitmen karang dapat dilihat berdasarkan jumlah juvenil karang yang dapat hidup di suatu ekosistem perairan. Kesuksesan planula melakukan penempelan pada substrat dan akhirnya dapat berkembang menjadi juvenil karang merupakan indikator kesuksesan biota karang untuk kelangsungan hidup keturunannya. Tujuan penelitian rekruitmen karang di Perairan Kendari adalah untuk menginformasikan status juvenil karang di lokasi penelitian. Hasil penelitian menunjukkan bahwa kelimpahan juvenil karang tertinggi terdapat pada stasiun penelitian Tukalanggara (gosong) dan Pulau Bahulu (7.7 dan 8.6 rekruit/m2), sedangkan ketiga stasiun penelitian lainnya (Teluk Wawobatu, Tukalanggara daerah tanjung, dan Pulau Labengke) menunjukkan hasil kelimpahan juvenil yang lebih rendah, yaitu beturut-turut 4.0; 3.9; dan 3.3 rekruit/m2. Ukuran juvenil karang dengan tingkat kelulushidupan tertinggi dicapai pada saat juvenil berukuran 2-4.9 cm. Karakteristik habitat lokasi penelitian yang berbeda dan kondisi bentik terumbu merupakan faktor utama kesusksesan karang muda untuk dapat tumbuh.Kata kunci: juvenil, perairan Kendari, rekruitmen karang, kelimpahanProcess of coral recruitment can be assessed base on the number of existing juvenile corals in an aquatic ecosystem. The success of planula attachment on the substrate and may eventually develop into juvenile coral is an indicator of coral reefs to continue there generation. Objectives of the study were to inform the status of coral recruitment at the research site. Results showed that the higher abundance of juvenile corals found in Tukalanggara (gosong) and Bahulu Island (7.7 and 8.6 rekruit/m2) than those in other locations (Gulf Wawobatu, Tukalanggara cape area, and Labengke island). Range size of coral juvenile with the highest survival rate is at 2-4.9 cm length. Characteristics of research sites and condition of benthic substrattum is the main factor upon the success juvenile corals to grow.Key words: juvenile, Kendari waters, recruitment of coral, abundance
Profil Pigmen Polar dan Non Polar Mikroalga Laut Spirulina sp. dan Potensinya sebagai Pewarna Alami (Profile of Polar and Non-Polar Pigment from Marine Microalgae Spirulina sp. and Their Potential as Natural Coloring) Sedjati, Sri; Yudiati, Ervia; Suryono, Suryono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (153.275 KB) | DOI: 10.14710/ik.ijms.17.3.176-182

Abstract

Penelitian pigmen Spirulina sp. dilakukan untuk menentukan kandungan pigmen polar dan non polar dari Spirulina sp. dengan metode Spektroskopi UV-Vis. Pigmen polar diekstraksi dengan menggunakan larutan buffer fosfat (NaOH-KH2PO4) pH 7, sedangkan pigmen non polar diekstraksi dengan menggunakan aseton murni. Hasil penelitian menunjukkan bahwa pigmen polar berwarna biru dan kadarnya adalah sebesar 42,272?0,05 mg/g (berat kering), pigmen ini terdiri dari fikosianin (29,159?0,29 mg/g), allofikosianin (9,363?0,20 mg/g), dan fikoeritrin (3,750?0,09 mg/g). Warna pigmen non polar adalah hijau terang dan kadarnya sebesar 4,498?0,06 mg/g (berat kering), pigmen ini terdiri dari klorofil a (3,349?0,03 mg/g) dan karotenoids (1,158?0,03 mg/g). Ekstrak pigmen polar Spirulina sp. kadarnya lebih tinggi dibanding pigmen non polarnya. Pigmen fikosianin berpotensi dikembangkan sebagai bahan aditif pewarna biru alami, karena: kadarnya paling tinggi, menghasilkan warna biru cerah dan cemerlang, bersifat nutrisi fungsional dan tidak beracun.Kata kunci: Spirulina sp., polar, non polar, pigmen, alamiResearch on pigments from Spirulina sp. powder has been done in order to determine polar and non polar pigments content by UV-Vis Spectroscopy method. Polar pigments were extracted using phosphate buffer (NaOH-KH2PO4) pH 7, while non polar pigments were extracted using pure aseton. The result showed that colour of polar pigment was dark blue and its content was 42,272?0,05 mg/g (dry weight), these pigments consist of phycocyanin (29,159?0,29 mg/g), allophycocyanin (9,363?0,20 mg/g), and phycoerythrin (3,750?0,09 mg/g). The colour of non polar pigment was light green and its content was 4,498?0,06 mg/g (dry weight), these pigments consist of chlorophyll a (3,349?0,03 mg/g) and carotenoids (1,158?0,03 mg/g). Due to the high content of pigments from Spirulina sp, showing a bright blue colour, having functional nutrition, and non toxic, the polar pigment phycocyanin have been found suitable for use as additif natural blue colorant.Key word: Spirulina sp., polar, non polar, pigment, natural
Shell Injuries in Two Intertidal Gastropods Littorina scabra (Linnaeus, 1758) and Thais bufo (Lamarck, 1845) From Tranquebar, Southeast Coast of India Kesavan, Kaila; Ravi, Velayudham; Rajagopal, Santhanam
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 14, No 2 (2009): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (324.337 KB) | DOI: 10.14710/ik.ijms.14.2.89-92

Abstract

Littorina scabra?and?Thais bufo?were collected from the rocky shore of Tranquebar and the shell injury due to predation or wave action was estimated in both male and female snails. In both the cases, the results show that the shell injury is not depending on shell size but mainly on their exposure to continuous wave action. The physical damage caused to them due to the rolling of small rocks, boulders and the risk ofpredation was mainly from crabs and birds.?'n the present study a survey has been made to estimate the percentage ofsheil injury in male and female snails?and different size groups of the above two different species. Obviously there is a relationship between crabs, stones?md shell damage. In?L scabra?the shell damage in male and female was 47.18% and 41.1% and the size group?m 16.10 mm to 18.10 mm is dominant with 28.44% of shell injury. Whereas in?T. bufo?it was 50.81% in male and?44.44% in female and the size group of 40.01 mm to 48.10 mm is dominant with 21.22% ofsheil injury respectively. The male and female of both the species for the length and width ofsheil damage were positively correlated. Anova for within the species in shell damage in?L. scabra?didn't show variation but forT. bufo?it showed variation. Anova for?between the species showed significant variation. Among these the female in?L. scabra?and male in?T. bufo?showed?a maximum injury .This may be able to asses the threat to organisms and shows the level ofpredation and the damage caused by environmental factors. ? Key words?:?Tranquebar, gastropods, predation, shell injury, rocky shore

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