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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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Pengaruh Pengaturan Intensitas Cahaya yang Berbeda Terhadap Kelimpahan Dunaliella sp. dan Oksigen Terlarut dengan Simulator TRIAC dan Mikrokontroller AT89S52 Mochammad Facta; Muhammad Zainuri; Sudjadi Sudjadi; Sakti Pancar Emak
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 2 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Energi matahari dibutuhkan oleh phytoplankton dilaut dalam proses fotosintesis. Laju fotosintesis akan meningkat bila intensitas cahaya meningkat dan menurun bila intensitas cahaya berkurang, sehingga cahaya berperan sebagai faktor pembatas utama dalam fotosintesis atau produktvitas primer. Penelitian ini dilakukan untuk pembuatan dan pengujian pengaturan intensitas cahaya lampu buatan untuk proses fotosintesis fitoplankton Dunaliella sp. Cahaya lampu diatur intensitasnya mengikuti pola cahaya matahari dengan panjang gelombang 0.4μm- 0.7μm menggunakan rangkaian konverter AC-AC. Konverter AC-AC tersebut menggunakan rangkaian TRIAC yang pemicuannya dikontrol dengan mikrokontroler AT89S52. Hasil pengujian menunjukkan bahwadari perlakuan siklus on-off (A), siklus 3 jam (B) dan siklus matahari buatan (C), menunjukkan bahwa respon fotosintesis yang paling bagus dan efisien adalah perlakuan dengan siklus matahari buatan (C)Kata kunci : Intensitas cahaya buatan, fitoplankton Dunaliella sp., microcontroller, AC-AC converterSun light intensity plays an important role to photosynthesis process in the sea water. The photosynthesis rates will be high when the light intensity is high and it will be down when the light intensity decreases.Therefore light play significant role as the limiting factor in primary productivity of photosynthesis. The research purpose is to provide the artificial lighting lamp for phytoplankton. (Dunaliella sp.) photosynthesis process. The lighting lamp intensity is controlled in order to be similar with sunlight intensity pattern that has wavelength 0.4 mm 0.8mm by using AC - AC converter circuit. The AC-AC converter uses TRIAC triggered by AT89S52 microcontroller. The experimental result indicates that the artificial lighting controller can be used to support phytoplankton photosynthesis process. This is indicated by the dissolved oxygen (DO) and the density of phytoplankton which tend to follow the pattern of the given lighting intensity.Key words: artificial lighting, phytoplankton Dunaliella sp., microcontroller, AC-AC Converter

Green Mussels (Perna viridis L.) Culture in Mangrove Area Potentially Impacted by Heavy Metal Suyono Suyono; Rossita Shapawi; Narto Narto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 2 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The purposes of this study are to investigate the types of different collectors and their most effective height of installation in the green mussels cultivation (Perna viridis L.) impacted by heavy metal pollution in mangrove and non-mangrove waters; and to determine the content of heavy metals, especially Pb, Cu, Cd, and Hg in green mussels cultivation. This research was conducted from April to September 2018 in the coastal area of Karangdempel, Losari Sub District, Brebes Regency. The method used in this research was experimental. The results showed that the growth of green mussels after 6 months period of maintenance reached 7-9 cm long, weighing 10-13 grams per head and yielded 23-30 heads per collector. The most effective mussel collector was net sacks installed at a height of 30 cm from the bottom of the water. The number of mussels per collector was more in mangrove location compared to those in the non-mangrove location, while their growth in length and weight were relatively the same. Heavy metal content in seawater and in the mussel meat are still within the permissible limits of the Indonesian National Standard, except for the Cu content in the mussel exceeding the allowable limit; but it was relatively still safe accoring to the Decree of the Director General of Drug Control and Food, Indonesian Ministry of Health, No. 03725/B/SK/1989. Pb content in sediments in both location of green mussels cultivation and the Cisanggarung River basin is still within the safe limits. The content of Cd, Cu, and Hg in sediments tends to be high. Heavy metal content both in mangrove and non-mangrove areas was not different as a result of mangrove reforestation dominated by seedlings and saplings with little influence on the quality of the water ecologically and economically.

Biodiversitas Jenis Cetacean di Perairan Lamalera, Kupang, Nusa Tenggara Timur (Biodiversity of Cetacean at the Waters of Lamalera, Kupang, East Nusa Tenggara) Yusron Eddy
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 2 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian Cetacean di perairan Lamalera, Kupang Nusa Tenggara Timur telah dilakukan pada bulan Juli 2011. Penelitian ini menggunakan metode eksplorasi dengan menggunakan Kapal Riset Baruna Jaya VIII. Pengamatan jenis, jumlah, dan perilaku lumba-lumba telah dilakukan secara visual. Berdasarkan pengamatan lokasi perjumpaan tersebut adalah di perairan Lamarela siang hari saat kapal menuju ke arah selatan dengan jarak sekitar 3,5 km dari kapal pengamatan. Jenis cetacean yang dijumpai yang pertama adalah 12 ekor 080 39’ 494” dan N 1220 47’ 651”), ke dua 8 ekor lumba-lumba (S 080 14’ 344” dan N 1230 23’ 110”) dan yang ke tiga 15 ekor (S 080 13’ 393” dan N 1230 56’ 580”) jadi total yang terlihat selama pengamatan 7 hari berjumlah 35 ekor lumba-lumba dari Genus Tursiops dengan species Turciops truncatus (bottlenose dolphin) yang dikenal dengan lumba-lumba hidung botol.Kata kunci: Cetacean, Biodiversitas, Lamarela, Nusa Tenggara TimurCetacean Research in the waters Lamalera, Kupang, East Nusa Tenggara have been carried out in July 2011. Observations made using binoculars binoculars and camera equipped Telezom. Based on observations of theencounter location is in the waters Lamarela afternoon when the ship headed toward the south with a distance of about 3.5 km from the ship observations. Types of cetaceans that first encountered the tail is 12 080 39 '494 "and N 1220 47' 651") and the two eight dolphins tail (S 080 14 '344 "and N 1230 23' 110") and the third 15 tail (S 080 13 '393 "and N 1230 56' 580") so total that seen during the observation 7 days amounted to 35 tails of dolphins of the genus Tursiops truncatus Turciops species (bottlenose dolphin), known as bottle nose dolphins.Key words: Cetacean, Biodiversity, Lamarela, East Nusa Tenggara

Pengaruh Pemberian Copepoda Tunggal dan Kombinasi terhadap Kelulushidupan Kuda Laut (Hippocampus kuda) Sri Rejeki
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 12, No 1 (2007): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Tingkat kelulushidupan juwana kuda laut sangat dipengaruhi oleh kesesuaian pakan. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian Copepoda tunggal dan kombinasinya sebagai pakan alami terhadap kelulusan hidupan kuda laut (Hippocampus kuda). Juwana kuda lautyang berumur 1 hari (Dl) dengan padat penebaran 10 ekor/liter dipelihara dengan pemberian pakan copepoda yang berbeda. Percobaan dilakukan dengan Rancangan acak lengkap dengan 8 perlakuan yaitu A. Copepoda mix (campuran berbagai jenis copepoda); B. Acartia sp., C. Oithona sp., D. Tigriopus sp., E. Kombinasi Acartia sp. dan Oithona sp. (1:i); F. Kombinasi Acartia sp. dan Tigriopus sp (1:1); G. Kombinasi Oithona sp. dan Tigriopus sp. (1:1), H. Kombinasi Acartia sp., Oithona sp., dan Tigriopus sp. (1:2:1) masing-masing dengan 3 ulangan. Hasil penelitian menunjukkan bahwa perbedaan jenis copepoda memberikan pengaruh yang nyata (P<0,05) terhadap tingkat kelulushidupan juwana kuda laut. Kelulushidupan tertinggi ditunjukkan oleh juwana yang diberi pakan copepoda kombinasi (1:1) Acartia sp. dan Oithona sp. (AB) yaitu (55± 13,29)% sedang tingkat kelulushidupan terendah ditunjukkan pada pemberian pakan copepoda jenis Acartia sp. (A) yaitu (15±8,66)%. Kata kuncl : kuda laut, Hippocampus kuda, copepoda.The survival of seahorse juvenile is affected not only by water quality but also by suitable feed organism. The research is aimed to determnine the impact of giving copepod as natural food organisms on the survival rateof juvenile seahorse (Hippocampus kuda). Testing animals are juvenile seahorse (Hippocampus kuda) age of one day (D1) with stocking density of 10 indv./liter. Completely Randomised Design was applied with 8treatments and each was triplicated. The treatment of 4 individu/mL are A. Copepod mix (mixed species); B. Acartia sp., C. Oithona sp., D. Tigriopus sp., E. Mixed of Acartia sp. and Oithona sp. ratio of 1:1; F. Mixed of Acartia sp. and Tigriopus sp. ratio of 1:1; G. Mixed of Oithona sp. dan Tigriopus sp. ratio of 1:1, H. Mixed of Acartia sp., Oithona sp., and Tigriopus sp. ratio of 1:2:1. The result of experiment showed thatdifferent species copepods have significantly effect on survival of juvenile seahorse (P<0,05). The highest survival were showed by juvenile seahores given mixed of copepods Acartia sp. and Oithona sp. (AB) i.e.(55±13,29)%. While Acartia sp. (A) gives the lowest survival rate (15±8,66%).Key words: seahorse juvenile, Hippocampus kuda, feed, copepods

Angular Range Analysis (ARA) and K-Means Clustering of Multibeam Echosounder Data for Determining Sediment Type Fahrulian Fahrulian; Henry M Manik; Indra Jaya; Udrekh Udrekh
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 21, No 4 (2016): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Backscatter value was a key to determine seabed characteristic. Level of intensity or backscatter informed through seabed type. One approach was use to analyze seabed type based on the value of backscatter was Angular Range Analysis (ARA). ARA utilize influence of angle backscattering intensities. The aim of this research was to determine value of backscatter from the bottom and used to initial prediction of seabed. Extraction processes of raw data obtained by acoustic signal processing techniques. Analysis of backscatter data was conducted by using K-means method to look the proximity of the centroid backscatter value against other values. Backscatter intensity from this sites ranged from -41,93 dB to -27 dB. The range value divided into three major classes based on Wenworth scale classification. Substrate type in the study site consists of sand, silt, and clay. Grain size diameter of each type include: sand 0.122713 mm (phi = 3.02), silt 0.018171 mm (phi = 5.78) and clay 0.002690 mm (phi= 8.53). Based on this result, signal processing multibeam echosounder able to classify seabed backscatter values to determine the seabed type Keywords: Angular Range Analysis, multibeam echosounder, K-Means

Studi Penyusunan dan Pemetaan Potensi Budidaya Laut di Perairan Kabupaten Rembang Propinsi Jawa Tengah Johannes Hutabarat
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 4 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Besarnya potensi perairan pantai yang dimiliki Kabupaten Rembang sangat dimungkinkan untuk dimanfaatkan sebagai daerah pengembangan budidaya laut dengan karakteristik kondisi hidrometeoroseanografis yang bervariasi. Informasi tentang lokasi perairan laut di Kabupaten Rembang yang dapat dimanfaatkan untuk budidaya laut masih sangat terbatas. Oleh karena itu perlu dilakukan kajian dan inventarisasi lokasi yang potensial untuk menetapkanpotensi sumberdaya laut, memetakan dan menetukan lokasi budidaya laut, menyusun rekomendasi lokasi yang potensial, jenis kultivan unggulan, rancang bangun teknologi budidaya yang sesuai dengan kondisi perairan Kabupaten Rembang. Metode yang digunakan metoda survey, analisis potensi perairan pantai dan laut dengan TeknologiPenginderaan Jauh dan Sistem Informasi Geografis, yang dilengkapi dengan survey “Ground Truth” menggunakan GPS. Penentuan titik pengamatan dengan metode simple random sampling, data primer berupa data kualitas perairan hasil pengamatan dan pengukuran langsung di lapangan (Parameter fisika, kimia, biologi dan sumberpencemaran). Data hidrometeoroseanografis yang dikumpulkan di perairan : P. Marongan, P. Gede, P. Gurian, P. Masaran dan perairan antara Jatisari - Sluke di analisis dengan teknik pembobotan dan dibandingkan dengan kepustakaan untuk menetapkan kesesuaian lokasi dengan persyaratan budidaya laut. Sedangkan kesesuaian jeniskultivan dan teknik budidaya di lokasi penelitian ditetapkan dengan menggunakan teknik tumpang susun (overlay) terhadap peta hasil interpretasi citra landsat peta bentuk lahan, peta substrat dan peta kedalaman yang dilengkapi dengan penggunaan kriteria penyesuaian. Hasil kajian ini menunjukkan bahwa lokasi di perairan Rembang yangpotensial untuk kegiatan budidaya laut adalali perairan P. Marongan (60 Ha), P. Gede (37 Ha), P. Masaran (6,9 Ha), P. Gurian (3,8 Ha) dan perairan Jatisari -Sluke (75 km2) Sedangkan jenis kultivan dan metoda budidaya yang cocok digunakan di masing-masing perairan tersebut adalah Rumput laut (Euchema cotonii) dengan metoda “Raft Culture”,Teripang (Holothuria sp.) dengan metoda “Pen Culture”, Kerapu (Ephinephelus sp.), Beronang (Siganus sp.), dan Kakap (Lates calcalifer) dengan metoda Cage Culture (Jaring Apung).Kata kunci : Lokasi perairan potensial, kultivan unggulan dan metoda budidaya lautThere is a high possibility of utilizing and developing marine resources of Rembang waters for marine culture activties based on its hydrometeoroceanographic conditions. However, the information of suitable sites for marine culture activities at Rembangs waters is very limited. This present study was set to investigate the potential sites for developing marine culture including the suitable marine organisms which can be cultured at those sites.Inventarisation and potential analysis was done by survey methods using geographic information system, followed by ground truth using GPS. Water quality data were taken in situ. Hydrometeoroceanographic data were taken from Marongan Island, Gede Island, Gurian, Island, Masaran Island, and waters betweenJatisari and Sluke. Data were analysed by using scoring technique and followed by comparison with data taken from literatures to determine the good sites for marine culture. While in order to determine the suitable organisms was carried out by using overlay technique of several maps including landsat image interpretation, substrate maps, completed by relaed suitable criteria. The results showed that there is high potential of Rembang waters to be developed as marine culture activities sites, i.e. Marongan Island (60 ha), Gede Island (37 ha), Masaran Island (6,9 ha), Gurian Island (3,8 ha) and waters between Jatisari and Sluke (75km2). While the suitable organisms to be cultured are as follows : Sea weed (Euchema cotonii) by using raft culture; Sea Cucumber (Holothuria sp) by using pen culture; Grouper (Ephinephelus sp), Beronang (Siganussp), Kakap (Lates calcalifer) by using cage culture.Key words: potential sites, suitable organsims, marine culture

Effect of pH on Growth and Survival Rate of Artemia Fed on Picophytoplankter Nannochloris sp. (Pengaruh pH Terhadap Pertumbuhan dan Kelulushidupan Artemia yang Diberi Pakan Nannochloris sp.) Gunawan Widi Santosa
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 18, No 2 (2013): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.18.2.105-112

Akumulasi CO2 dan naik turunnya pH adalah faktor yang sangat penting untuk dikendalikan dalam mengkultur hewan yang diberi pakan algae. Percobaan pemberian pakan dengan salah satu picophytoplanton seperti Nannochloris sp sebagai penyumbang utama produktifitas primer dalam ekosistem laut, menjadi penting untuk dilakukan. Penelitian ini bertujuan untuk mengetahui pertumbuhan dan kelangsunganhidup Artemia setelah diberi pakan sel algae baik dalam keadaan hidup atau mati dalam media dengan pH yang berbeda. Dalam penelitian ini sebanyak 1500 nauplii Artemia dikultur, dalam tabung Ferbach dengan posisi terbalik, pada kisaran pH 6.5, 7.0, 7.5, 8.0, dan 9. Sebanyak 4.0 x 106 sel.mL-1 Nannochloris sp pada fase logaritme diberikan sebagai konsentrasi awal pakan sampai hari ke-4. Mulai hari ke-5 pakan diberikan setiap 12 jam. Perubahan konsentrasi pakan dan pH media dicatat tiap hari dan selalu dikembalikan pada konsentrasi awal. Setiap dua hari disampling untuk menghitung pertumbuhan panjang/berat, kelulushidupan Artemia dan efisiensi pertumbuhannya. Hasil penelitian menunjukkan bahwa pertumbuhan Artemia mengikuti pola yang sama di semua tingkatan pH (kisaran 4,37-5.28 mm), namun tidak berbeda secara statistik pada P>0.05. Sebaliknya, kelangsungan hidup Artemia menunjukkan adanya pengaruh yang nyata pada kondisi ini pada P<0.05 (kisaran 82,5-95.0%). Dari kajian ini menunjukkan bahwa kisaran pH media masih baik untuk kultur Artemia pada kondisi laboratoris penelitian, buktinya kelangsunganhidupnya mencapai 95% dengan pakan sel mati dan 82,5% dengan pakan sel hidup. Hasil ini mengkonfirmasikan bahwa Nannochloris sp merupakan pakan yang layak diberikan kepada Artemia baik dalam kondisi hidup maupun mati. Kata kunci: pertumbuhan, kelangsungan hidup, artemia, picofitoplankton, Nannochloris sp. Accumulation of CO2 and associated with drift of pH is one of important factors should be controlled in culturing animals fed on microalgae. Feeding trials with Artemia fed on one of picophytoplankters Nannochloris sp, which has been to be major contributor of the primary productivity of marine ecosystems, is becoming importance to be done. The experiment was aimed to investigate the growth and survival rate of Artemia after consuming on either live or dead cells of algae in different pH media. In this experiment 1500 Artemia nauplii were cultured in upside down potition of Ferbach glass in various pH levels ranged from 6.5, 7.0, 7.5, 8.0, and 9.0 respectively. The food was added to the culture flasks from day 0 to give an initial population density of 4.0 x106 cells.mL-1 and thereafter at 24 h intervals until day 4. From day 5 the food were given to the animal at 12 h interval with each addition regulated to restore the population density to the initial level. pH level was kept and adjustment was made by addition of NaOH and or HCl to bring the pH at original levels. Water media was changed at every four day period. Every two and four days the animals were sampled for body length/weight, growth efficiency, and survival rate measurement. The results showed that growth of Artemia followed a similar pattern in all levels of pH (ranged from 4.37-5.28 mm), however, there was no effect on body length growth rate of Artemia after 15 days period of incubation at P>0.05. On the other hand, the survival rate of Artemia showed a significant effect under these condition at P<0.05. From the present study it could be confirmed that range of pH in the media was suitable for the culture of Artemia in the current laboratory conditions as evidenced by higher survival (up to 95% fed on dead cell and 82.5% fed on live cell). This result also confirmed that Nannochloris sp. was suitable food for Artemia culture both given alive or dead cell. Keywords: Growth, Survival, Artemia, picophytoplankton, Nannochloris sp.

Chemical Composition, Antimicrobial, Cytotoxic and Antiplasmodial Activities of Three Sponges from Buton Islands, Indonesia Putra, Masteria Yunovilsa; Hadi, Tri Aryono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 3 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

GC-MS analysis of the crude extracts of three different species of Indonesian marine sponges has been carried out for identification of bioactive compounds. The GC-MS analysis from Haliclona (Gellius) sp., Lamellodysidea herbacea, and Spheciospongia inconstans revealed the presence of 23, 21, 19 various compounds, respectively and mainly sterols and fatty acids. All the sponge species has been evaluated for antimicrobial activities, cytotoxicity using brine shrimp lethality bioassay and heme polymerization inhibitory activity assay for antiplasmodial activity. In this study, all the sponge species showed antimicrobial activities against at leastone of the test strains. Among them, the extract of sponge Lamellodysidea herbacea displayed activity against two Gram-positive bacteria (S. aureus and B. subtilis) and the Gram-negative bacteria V. cholerae, with inhibition zones of 10.3, 9.2 and 9.5 mm, respectively. The sponge Haliclona (Gellius) sp., showed significant activity against fungal pathogen C. albicans. The sponge Haliclona (Gellius) sp., displayed the ability to inhibit heme polymerization indicating an anti-Plasmodium function and also showed potent cytotoxic activity against the brine shrimp Artemia sp. Keywords: GC-MS analysis, antimicrobial, sponges,bioactive

Kajian Lokasi Upwelling untuk Penentuan Fishing Ground Potensial Ikan Tuna Kunarso, Kunarso; Hadi, Safwan; Ningsih, Nining Sari
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 2 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Ikan tuna adalah penyumbang devisa negara dari sektor perikanan yang tinggi.Penentuan lokasi fishingground yang tepat perlu dilakukan untuk mengoptimalkan penangkapannya. Lokasi upwelling sebagai daerah yang subur perlu dikaji keterkaitannya dengan fishing ground tuna. Tujuan penelitian ini adalah mengkaji kaitan antara lokasi upwelling dengan fishing ground potensial ikan tuna. Metode penelitian ini menggunakan analisis diskriptif dengan membandingkan data karakteristik lokasi upwelling , bioekologi dan perikanan tuna. Berdasarkan hasil analisa ditemukan bahwa lokasi upwelling merupakan fishing ground tuna yang potensial. Dengan meng-overlay (penampalan) peta distribusi tuna dan lokasi upwelling, telah diperoleh peta lokasi prediksi fishing ground tuna yang potensial berdasarkan variasi bulan dan tipeperiode kejadian iklim (Normal, El Niño, dan La Niña)Kata kunci : tuna, lokasi upwelling, lokasi penangkapanTuna fishes give high contribution to the country devisa. Determination of proper fishing ground isnecessary to be done in order to optimallize the tuna catch. The upwelling location, as the fertile area, andits correlation with tuna fishing ground are necessary to be studied. The aim of this research was studyingcorelation between upwelling location with tuna fishing ground. Metode of this research used was descriptionanalysis with compare upwelling characteristis, bioecology, and tuna fishing data. Based on analysis of the result, it is found that upwelling location is potential tuna fishing ground. By overlying, we have produced the monthly prediction map of potential tuna fishing ground and its relation to climate variability (e.g., Normal, El Niño, and La Niña events).Key words : tuna, upwelling, fishing ground

Settlement and Metamorphosis of Coral Planulae Incubated with Commercial Peptide Hym-248 at Different Age (Penempelan dan metamorfosis planula karang yang diinkubasi peptida komersial Hym 248 pada umur berbeda) Mea Pradnawati; Diah Permata Wijayanti; Ambariyanto Ambariyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 19, No 1 (2014): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Keberhasilan pemeliharaan planula karang membutuhkan dorongan pada planula untuk menempel pada substrat. Neuropeptida komersial Hym-248 diketahui mampu mendorong planula untuk menempel. Waktu pemberian peptida mempengaruhi penempelan dan metamorfosis planula. Penelitian ini bertujuan untuk mendeskripsikan perbedaan penempelan dan metamorfosis planula karang yang diberi peptida Hym-248 pada usia 1 hari dengan planula karang yang diberi peptida Hym-248 pada usia 6 hari. Penelitian ini menggunakan slick (kumpulan gamet yang dilepaskan koloni karang dari berbagai spesies yang melakukan spawning serentak) yang berasal dari perairan Pulau Sambangan, Kepulauan Karimunjawa. Planula diberi Hym-248 dengan konsentrasi 1×10-7 M dan 1×10-5 M untuk planula umur enam hari dan 1×10-7 M, 1×10-6 M, dan 1×10-5 M untuk planula umur satu hari. Planula yang diberi Hym-248 pada usia 1 hari sudah mulai menempel pada jam ke-4 dan mulai bermetamorfosis pada jam ke-120, sedangkan planula yang diberi Hym-248 pada usia 6 hari tidak mengalami penempelan dan metamorfosis sama sekali hingga akhir penelitian. Keberhasilan menempel tertinggi terjadi pada planula yang diberi Hym-248 dengan konsentrasi 1×10-6 M sebanyak 5.83% pada jam ke-192. Penempelan dan metamorfosis planula dari slick yang diberi Hym-248 pada usia 1 hari lebih baik dari planula yang diberi Hym-248 pada usia 6 hari. Penelitian ini memberi harapan untuk memproduksi benih karang secara masal menggunakan benah yang berasal dari reproduksi seksual. Kata kunci: penempelan, metamorfosis, planula karang, slick, Hym-248 The success of coral planulae rearing needs stimulant for planulae to attach onto substrate. Commercial neuropeptide Hym-248 is known to induce planulae to metamorphose and settle. The timing to add peptide affects planulae attachment and metamorphosis. This research was aimed to describe the difference of settlement and metamorphosis in coral planulae added Hym-248 at the age of 1 day and 6 days. This research used a slick, egg-spem bundles released from multi-specific spawning corals. The study conducted at Sambangan Island, Karimunjawa Islands. Planulae were added with Hym-248 at concentration of 1×10-7 M and 1×10-5 M for 6 days old planulae and 1×10-7 M, 1×10-6 M, and 1×10-5 M for 1 day old planulae. The highest settlement rate was observed on the planulae treated with 1×10-6 M dose of Hym-248 at 144th hour with percentage of settled planulae was 32.08%. However, only 5.83% were metamorphosed after 60 hrs observation. One day old planulae incubated with Hym-248 started to attach at 4th hour and metamorphosed at 120th hour, whereas none of 6 days planulae attach or metamorphose until the end of the experiment. This study suggested that incubated planulae in Hym-248 media will give a better result when planulae are at one day old. This study highlight the possibility to produce mass-seedling colonies using sexually derived planulae. Keywords: settlement, metamorphosis, coral planulae, slick, Hym-248

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