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All Journal HAYATI Journal of Biosciences Buletin Udayana Mengabdi ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Transmisi: Jurnal Ilmiah Teknik Elektro Widyanuklida Journal of Marine Research Jurnal Akuntansi AKUNESA BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Simetris Jurnal Keperawatan Soedirman (The Soedirman Journal of Nursing) Hunafa: Jurnal Studia Islamika Speed - Sentra Penelitian Engineering dan Edukasi Jurnal Teknologi Informasi dan Ilmu Komputer Jurnal Edukasi dan Penelitian Informatika (JEPIN) Religio : Jurnal Studi Agama-agama WARTA Tajdida Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi dan Pembangunan Benefit: Jurnal Manajemen dan Bisnis JEB17 : Jurnal Ekonomi dan Bisnis JHP17 (Jurnal Hasil Penelitian) Jurnal Kelautan Tropis KLIK (Kumpulan jurnaL Ilmu Komputer) (e-Journal) Ishraqi Profetika Riset Akuntansi dan Keuangan Indonesia InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan JURNAL ILMU BUDAYA Journal of Elementary Education Sinkron : Jurnal dan Penelitian Teknik Informatika Journal of Accounting and Management Innovation Journal Of Chemical Process Engineering (JCPE) Journal of Industrial Engineering Management Paradigma Omni-Akuatika Kesmas Indonesia: Jurnal Ilmiah Kesehatan Masyarakat Jurnal Bina Praja JRMSI - Jurnal Riset Manajemen Sains Indonesia Jurnal Pengabdian Masyarakat AbdiMas Journal of Islamic Economic Laws Jurnal Kolaboratif Sains Jurnal Serambi Engineering Patria Artha Technological Journal KOMIK (Konferensi Nasional Teknologi Informasi dan Komputer) Jurnal Ilmiah Mandala Education (JIME) JISIP: Jurnal Ilmu Sosial dan Pendidikan JUPE : Jurnal Pendidikan Mandala INSIST (International Series on Interdisciplinary Research) Barometer Arthavidya Jurnal Ilmiah Ekonomi PROSIDING SEMINAR NASIONAL LEMBAGA PENELITIAN DAN PENDIDIKAN (LPP) MANDALA Jurnal Ilmu Komputer dan Bisnis Unistek: Jurnal Pendidikan dan Aplikasi Industri Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences PENGABDI: Jurnal Hasil Pengabdian Masyarakat Jurnal Ilmiah Wahana Pendidikan Journal of Accounting and Management Innovation Jurnal Ilmiah Ibnu Sina (JIIS): Ilmu Farmasi dan Kesehatan Jurnal Pustaka Aktiva : Pusat Akses Kajian Akuntansi, Manajemen, Investasi, dan Valuta

Ambariyanto Ambariyanto

Department Of Marine Science, Faculty Of Fisheries And Marine Science, Universitas Diponegoro Center For Coastal Disaster Mitigation And Rehabilitation, Universitas Diponegoro

Author-ID : 2957778

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Struktur Komunitas Zooplankton di Muara Sungai Serang, Jogjakarta Bayu A Pranoto; Ambariyanto Ambariyanto; Muhammad Zainuri
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 2 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Zooplankton adalah salah satu komponen dalam rantai makanan yang diukur dalam kaitan dengan nilai produksi suatu ekosistem. Hal ini dikarenakan zooplankton berperan ganda baik sebagai konsumen satu maupun konsumen dua, dimana merupakan rantai penghubung di antara plankton dan nekton. Penelitian ini bertujuan untuk mengetahui struktur komunitas zooplankton di perairan muara Sungai Serang Yogyakarta. Metode penelitian yang digunakan adalah studi kasus. Penentuan stasiun sampling menggunakan metode pertimbangan (purposive sampling method). Pengolahan data meliputi kelimpahan, indeks keanekaragaman, indeks keseragaman, indeks dominansi, dan indeks dispersitas Morisita. Parameter perairan yang terukur suhu, salinitas, kecerahan, kecepatan arus, kedalaman, derajat keasaman (pH), DO, nitrat, dan fosfat. Hasil penelitian berdasarkan tanggal samplingdiperoleh kelimpahan rata-rata zooplankton berkisar antara 6.704-36.427 sel/L dengan indeks keanekaragaman 1,16-1,78; indeks keseragaman 0,75-0, 95; dan indeks dominansi 0,13-0,31. Sedangkan hasil penelitian berdasarkan stasiun diperoleh kelimpahan rata-rata zooplankton berkisar antara 10.952-31.669 sel/L dengan indeks keanekaragaman 1,17-1,65; indeks keseragaman 0,76-0,95; dan indeks dominansi 0,13 - 0,21.Berdasarkan hasil penelitian diperoleh hasil, bahwa genus zooplankton yang memiliki sebaran luas pada setiap stasiun (dominan) adalah genus Trigriopus, Nauplius, Pseudocalanus (Crustacea), Brachionus, Plerodina (Rotatoria). Berdasarkan hasil penelitian diperoleh kesimpulan bahwa zooplankton yang terdapat di perairan muara Sungai Serang Yogyakarta terdiri dari 6 kelas dan 21 genus. Sedangkan dilihat dari nilai indeks keanekaragaman dan keseragaman diketahui bahwa muara Sungai Serang termasuk daerah yang memiliki komunitas zooplankton yang beragam dan didominasi oleh kelas Crustacea.Kata kunci: struktur dan indeks komunitas, zooplankton, estuarinZooplankton is one of the components in the food chain especially in relation to the production of an ecosystem. This is due to the fact that zooplankton play both as first and second consumer. The objective of this study was to investigate the community structure of zooplankton within Serang River estuary, Yogyakarta. The research was based on a case study, while sampling was done by purposive sampling method. The abundance, variety index, diversity index, dominancy index, and dispersity index were calculated based on the data collected.. The water parameter measured temperature, salinity, transparency, current velocity, pH, dissolvedoxygen, nitrate, and phospate. The result showed that based on the date of sampling the average of zooplankton abundance were ranged between 6704 - 36427 cell/L with variety index range between 1,16-1,78; diversity index were ranged between 0,75-0,95; and dominancy index were ranged between 0,13-0,31. While the results based on sampling station of the average of zooplankton abundance was range between 10.952 - 31.669 cell/L with variety index were ranged between 1,17-1,65; diversity index were ranged between 0,76-0,94; and dominancy index range between 0,13-0,21. The most common genera of zooplankton found in sampling station were Tigriopus, Nauplius, Pseudocalanus (Crustacea), Brachionus, Pterodina (Rotatoria).There were 6 classes and 21 genera of zooplankton found in the estuary of Serang River, Yogyakarta. Based on the value of the indices, it suggest that this estuary has high diversity of zooplankton and dominated by class CrustaceaKey words : structure and community indices, zooplankton. estuary

Cryptic Species from Biodiversity Hotspot: Estimation of Decapoda on Dead Coral Head Pocillopora in Raja Ampat Papua Eka Maya Kurniasih; Andrianus Sembiring; Ni Putu Dian Pertiwi; Aji Wahyu Anggoro; Ni Kadek Dita Cahyani; Muhammad Dailami; Ambariyanto Ambariyanto; Diah Permata Wijayanti; Christopher P. Meyer
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 1 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Cryptic organisms that live within the interstices of reef habitats contribute significantly to coral reef biodiversity. One example of this cryptic biodiversity is the high abundance of decapods in dead coral heads that associated with various biota. However, this diversity poorly studied especially species identification and species richness. This study aims to estimate the decapods diversity in Raja Ampat, Papua, using Pocillopora dead coral head method as semi-quantitative sampling approach. Raja Ampat in Papua is chosen because it situated in the center of Coral Triangle marine hotspot. Data were collected from 10 dead coral heads of genus Pocillopora from 10-meter depth near the islands of Kri and Misool. This study observed a total of 205 individuals Decapoda from Kri Island and 672 Individual from Misool Islands. Species richness observation (Chao1 and ACE) of the total samples reports only 11 families of decapoda detected in this study. Rarefaction curve reach an asymptote after all after all ten dead coral were analyzed; indicating that additional sample collection would not change estimates of diversity found in this study. The Shannon-Wiener index diversity on the Kri Island showed lower diversity value (2.09) compared to Misool Island (2.18). In the future, this research can be used as a basis for understanding the diversity of coral reefs as well as for management and conservation of coral reef ecosystems.

Amino Acid Absorption by Tiger Grouper Fish (Epinephelus fuscoguttatus) Larvae. (Absorbsi Asam Amino oleh Larva Ikan Kerapu Macan (Epinephelus fuscoguttatus)) Ambariyanto Ambariyanto; Ali Djunaedi; Nur Taufiq S.P.J.; Pribadi Rudhi; Pringgenies Delianis
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 18, No 4 (2013): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Ikan Kerapu merupakan salah satu ikan unggulan yang ditargetkan sebagai komoditi eksport Indonesia. Usaha budidayanya saat ini sangat terganggu dengan tingginya mortalitas pada stadia larva. Usaha untuk mengatasi masalah tersebut adalah dengan menggunakan obat seperti antibiotik yang ternyata tidak membuahkan hasil maksimal tetapi justru menimbulkan resistensi beberapa jenis bakteria. Salah satu aspek yang belum pernah dilihat dalam rangka mengatasi masalah ini adalah dengan mengusahakan percepatan pertumbuhan pada stadia larva sehingga akan lebih mampu menghindari dari beberapa penyebab mortalitas. Salah satu sumber energi yang terdapat dalam perairan namun dalam jumlah yang tidak besar adalah dissolved organic matter (DOM). Penelitian ini ditekankan untuk melihat kemampuan larva ikan Kerapu dalam memanfaatkan DOM (digunakan asam amino terlarut ;ATT) yang terdapat di air laut. Sebanyak 16 (enam belas) jenis asam amino yang terdiri dari tiga klas yakni neutral, basic, dan acidic digunakan dalam penelitian ini. Sedangkan larva ikan Kerapu yang digunakan berumur 2 hari. Hasil penelitian menunjukkan bahwa larva ikan Kerapu menyerap seluruh jenis asam amino baik neutral, basic, dan acidic. Namun jenis asam amino yang diserap adalah glutamat, histidin, lisin, serin, metionin, tritopan dan iso leusin. Sedangkan yang paling banyak diserap oleh larva ikan ini adalah lisin. Hal yang menarik dalam penelitian ini adalah terdapat beberapa jenis asam amino yang diduga justru dikeluarkan oleh larva ikan tersebut yakni glysin, alanin, tyrosin, valin, phenil alanin dan leusin. Penyerapan beberapa jenis asam amino ini diduga dimanfaatkan oleh larva ikan Kerapu dalam proses pertumbuhannya. Kata kunci : asam amino terlarut, larva, Kerapu Macan, Epinephelus fuscoguttatus Kerapu (grouper fish) is known as an important and highly economic value fish and a good candidate for major export commodity for Indonesia. However, there is an important problem faced by its cultivation i.e. high mortality rate at larva stage. Many different efforts have been done to overcome this problem mainly by using drugs and antibiotics, which have caused another problem i.e. bacteria resitance. One aspect that has not been widely investigated is by increasing its growth rate so that the larvae will have the ability to avoid mortality, such as by utilising dissolved organic matter (DOM) which naturally occur in the environment. This research investigates the question whether Kerapu fish larvae have the ability to absorb DOM (in this case disolved free amino acids; DAA) as well as the preference and the rate of absorbsion. There were 16 species of DAA used in this experiment which consist of three classes i.e. neutral, basic, and acidic. Two days old larvae were used in the experimant. The results showed that Kerapu larvae absorbed all classes of amino acids, although not all amino acids given being absorbed but only glutamine, histidine, lysin, serine, triptophan, metionine and iso leusine. While the most absorbed amino acids was lysine. One interesting results showed that the larvae secrete several amino acids i.e. glysine, alanine, tyrosine, valine, phenil alanine and leusine. The absorbsion and secretion of amino acids were possibly related to its metabolic processes within the larvae in relation to growth processes. Keywords: dissolved free amino acids, DAA, larvae, Kerapu, Epinephelus fuscoguttatus

Presence of Microplastics in Windowpane Oyster Placuna placenta and the waters from the Tambak Lorok Coastal Area in Central Java, Indonesia Eduard Meirenno Tielman; Lisa F. Indriana; Ita Widowati; Ambariyanto Ambariyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 1 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.1.53-60

Indonesia is the second-largest contributor of plastic debris in the world. The abundance of plastic debris and the bioavailability of its fragmented form known as Microplastics (MPs; < 5 mm of size) can be dangerous for marine environments. This study investigates the presence of MPs in the sea water and marine organisms (Placuna placenta) at Tambak Lorok Waters located at the coast of Semarang city, Central Java, Indonesia. All of the microplastics collected from both samples were identified by their shape, color, size (using Olympus Stereo Microscope), and polymer type (using Fourier Transform Infra-Red Spectroscopy/FTIR). The study found that the Microplastic concentration in the water samples had an average of 12.6 particles.L-1, where the color and size distribution were predominantly blue colored fragments sized less than 50 µm. Examination of the study area showed that microplastics concentration in P. placenta was 1 item and 0.033 items.g-1 for each of the organism. Whereas for physical aspects of microplastics found in the oysters showed the blue colored fibers with range size 300-1000 µm were mostly present. Majority of the polymer types of microplastics found in this study were low-density polyethylene, nylon, polystyrene, and polypropylene. Data from this study shows that microplastics were present in the Tambak Lorok coastal waters. However, there was no significant statistical correlation between the concentration of microplastics in the seawater and the P. placenta, the presence of microplastics in the seawater were found to be ingested by the P. placenta.

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

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

Bioecology of coral reef in Panjang Island of Central Java Indonesia Suryono Suryono; Ambariyanto Ambariyanto; Munasik Munasik; Diah Permata Wijayanti; Raden Ario; Ibnu Pratikto; Nur Taufiq-Spj; Syahrial V. Canavaro; Tiara Anggita; Bayu Kreshna Adhitya Sumarto; Justin Cullen
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 26, No 2 (2021): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.26.2.125-134

Coral reefs currently are suffered from natural factors along with increasing anthropogenic activity. Panjang Island, a small reef island located in Jepara Regency, may also be experiencing such conditions. Therefore, this work was aimed to observe the condition of the coral cover of Panjang Island. Line intercept transect was applied to survey the coral cover and mortality index from fourteen stations. Insitu data consisted of the bottom substrate composition of the reefs and the physical parameters of the sea. The secondary data, i.e. coral reef area maps from 2001 to 2019 were taken from Landsat Image 7 and 8, data of wind were obtained from www.ogimet.com, while tidal data were collected from BMKG. The bathymetry was determined from the Geospatial Information Agency data, salinity global analysis forecast Phy 001.024 (CMEMS). Sea surface temperature (SST), and chlorophyll-a distribution were analyzed using ENVI software. The result showed that Panjang Island has a poor to the moderate condition of hard coral. Two out of six categories of abiotic and dead coral were found to be high. The mortality index of coral was in the high category (average 0.52). During research periods the sea waters were characterized by high sea surface temperature (29.34-30.94°C), chlorophyll-a was also tended to be high (0-2.65 mg.m-3), and an average of salinity was high 32 ‰. The weak currents came to all sides of the island, therefore the coral reef was not exposed to extreme currents. The waves came from the east, then the energy decreases after being blocked by coral reefs on the eastern side of the island, so that coral reefs in the northeast and south sides were safer to be exposed. The results suggest that hydrodynamic ecology directly or indirectly affected the percentage of coral cover and mortality index at the reefs of Panjang Island.

Growth Characteristics Layur Fish Lepturacanthus savala in Juata Waters, Tarakan, Indonesia Agus Indarjo; Gazali Salim; Fahrizal Amir; Supriadi Supriadi; Permana Ari Soejarwo; Christine Dyta Nugraeni; Lukman Yudho Prakoso; Ambariyanto Ambariyanto; Muhammad Firdaus; Julian Ransangan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.127-134

The city of Tarakan, Indonesia, benefits economically from abundant marine biological resources, one of which is the layur fish, known commercially as ribbonfish. The purpose of this study was to analyze the growth character of the layur fish (Lepturacanthus savala) obtained from the juata waters of Tarakan City. The method of this quantitative and descriptive study was to analyze the growth of layur fish Lepturacanthus savala in the Juata waters off the coast from the city of Tarakan. Body shape, length, weight, and ratio sex data were collected from sites selected by the purposive sampling method based on trawl fishing catch. Secondary data, collected from interviews of fishing personnel, included the number of catches using trawling gear and trawl fishing location. The length ranges of male from 20,4 to 54,0 cm with an average length of 37,2±16.8 cm (n = 255) and the length ranges of female from 20,5 to 68 cm with an average length of 44,25±23.75 cm (n = 275). The results showed that maximum length of male layur fish was smaller than the maximum length of female fish, which were 59.352 cm at 267 d and 72.638 cm at 315 d, respectively. The result shows a negative allometric growth pattern male and female layur fish was found to be the same and sex ratio of male to female has a ratio of 1,0: 1,8 with a percentage of males at 48.11% and females at 51.89%. The majority of male and female fish exhibited a thin body shape (51,4% of male and 52% of female).

Abundance of Tridacna (Family Tridacnidae) at Seribu Islands and Manado Waters, Indonesia Candhika Yusuf; Ambariyanto Ambariyanto; Retno Hartati
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 14, No 3 (2009): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Kima, yang merupakan salah satu hewan laut dilindungi, sejak lama banyak dieksploitasi di berbagai daerah di Indonesia. Apabila keadaan ini terus berlanjut maka akan terjadi penurunan populasi di alam yang berujung pada kepunahan dari berbagai spesies Kima tersebut di alam. Penelitian ini bertujuan untuk menganalisis kelimpahan Kima di beberapa pulau di Kepulauan Seribu dan perairan di sekitar Manado. Metode penelitian yang digunakan adalah deskriptif yang bersifat eksploratif. Sampling dilakukan dengan metode Line Intersept Transect (LIT) menggunakan garis transek sepanjang 100 meter sejajar dengan garis pantai pada kedalaman 5 meter. Pengamatan dilakukan pada tiap 2,5 meter di sebelah kanan dan kiri garis transek. Hasil penelitian, ditemukan total 167 individu Kima di Kepulauan seribu dan 61 individu di perairan Manado. Nilai kepadatan rata - rata pada lokasi Kep. Seribu adalah T. squamosa 0.026 indv/m2, T. maxima 0,016 indv/m2, T. crocea 0.028 indv/m2 sedangkan pada lokasi Manado adalah T. squamosa 0.021 indv/m2, T. maxima 0.0005 indv/m2, T. crocea 0.0085 indv/m2 dan T. gigas 0.002 indv/ m2. Hasil ini menunjukkan bahwa kepadatan Kima di dua lokasi penelitian masih lebih rendah dari beberapa lokasi di Indonesia dan luar negeri. Berdasarkan ukuran cangkang di dua lokasi penelitian diduga hanya T. crocea saja yang telah mencapai fase hermafroditiknya, sedangkan T. gigas dan sebagian besar T. squamosa serta T. maxima baru mencapai fase kematangan gonad jantan saja. Kebanyakan Kima ditemukan di karang mati beralga (Dead Coral Algae / DCA) dan tututan karang hidup (coral covered) dibandingkan dengan jenis substrat yang lain. Kata kunci : Kima, tridacna, kelimpahan, Kepulauan Seribu, Manado Giant clam, as a protected marine species, has been exploited massively in many regions in Indonesia. This has lead to the rapid extinction of the giant clam natural population. The purpose of the research is to obtain the abundance status of giant clam species in several island in Kepulauan Seribu and surroundings waters of Manado. Surveys were done by using the modification of Line Intercept Transect (LIT) methods. A hundred meter length of transect line were drawn, in depth of 5 meter and paralleled to the coast line. The observations were made in 2.5 meter to the left and right of the transect line. The results showed, there were total number of clams found at Seribu Islands and Manado waters were 106 and 61 individual, respectively. The average density in Seribu Islands were T. squamosa: 0.026 indv/m2, T. maxima: 0.016 indv/m2, and T. crocea: 0.028 indv/m2, and in Manado were T. squamosa: 0.021 indv/m2, T. maxima: 0.0005 indv/m2, T. crocea: 0.0085 indv/m2 and T. gigas: 0.002 indv/m2. These results showed that the density of giant clams in both places were found to be lower than other places in Indonesia and abroad. Based from the shell measurements on both locations, only T. crocea were suspected have reached its hermaphrodite phase, while T. gigas and most of T. squamosa and T. maxima were about to reached male gonad maturity phase. The most dominant substrate for the giant clam were the Dead Coral Algae (DCA) and the coral covered. Key words: Giant clam, tridacna, abundance, Seribu Islands, Manado

Effects of Different Microalgae on the Survivorship of Giant Clams Larvae (Tridacna squamosa) Ambariyanto Ambariyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 7, No 1 (2002): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Salah satu kendala yang dihadapi dalam usaha memproduksi Kima (giant clams, Bivalvia: Tridacnidae) adalah tingkat kelangsungan hidup larva yang rendah. Terdapat dua sumber energi utama bagi kima yang mempengaruhi kelangsunganhidup dan pertumbuhannya, yakni translokasi hasil fotosintesa dari zooxanthellae dan melalui proses fiIter feeding. Dalam penelitian ini larva kima diproduksi melalui teknik induce spawning dengan mengkombinasikan metoda kenaikan suhu dan penyuntikan serotonin pada gonad induk. Selanjutnya larva kima yang berumur 2 hari dan 9 hari diberi pakan beberapa jenis mikroalgae. Pengamatan terhadap jumlah larva dilakukan selama masing-masing 5 hari. Hasil penelitian menunjukkan tidak terdapat perbedaan yang nyata dari mikroalgae yang berbeda terhadap kelangsunganhidup larva kima. Namun terdapat kecenderungan bahwa larva yang diberi pakan mikroalgae dari genus Chaetaceros mempunyai laju kelangsunganhidup yang lebih tinggi dibandingkan dengan larva yang diberi pakan mikrolagae jenis lain maupun kontrol. Disamping itu, tidak seperti yang dilaporkan oleh peneliti lain, ternyata larva kima mampu mencapai metamorfosis walaupun tanpa pemberian pakan alami. Diduga hal ini disebabkan larva tersebut mampu memanfaatkan sumber energi lain dari lingkungan air laut disekitarnya .Kata kunci: kima, pakan alami, mikroalgae, kelangsunganhidup One of the major problems in giant clams (Bivalvia: Tridacnidae) production is low level of survival rate, especially within larvae development. There are two different important sources of energy required. which influence the survivorship of the clams, i.e. through zooxanthellae translocation and filter feeding processes. The best microalgae that can be fed to clams larvae, however has not known yet. The present study aimed to investigate the influence of various microalgae on the survival rate of giant clams larvae. The larvae produced by inducing adult giant clams using the combination of temperature increment and serotonin injection. Two different stages of larvae were used in this study i.e. 2 and 9 days old larvae. The number of larvae were monitored daily for 5 days. Statistical analysis showed that there was no significant effects of different microalgae on the survivorship of the larvae. However. larvae which were fed by Chaetoceros had higher survival rate than other treatments and control. Furthermore, unlike other reports, this study shows that larvae which were not fed by microalgae have reached metamorphoses. It is believed that these larvae are capable of utilizing other energy sources from their sorrounding environment.Keywords: giant clams larvae, natural feed, microalgae, survival rate

Pengaruh Surfaktan dan Hidrokarbon Terhadap Zooxanthellae Ambariyanto Ambariyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 1 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Pencemaran perairan laut sudah sering dilaporkan terjadi di berbagai tempat. Pencemaran ini secara langsung memberikan pengaruh yang negatif terhadap biota laut mulai dari terjadinya gangguan proses biologis hingga ke kematian massal. Akibatnya terjadi degradasi lingkungan perairan laut. Salah satu biota yang sering menjadi korban adalah karang yang dikenal hidup bersimbiosis dengan algae zooxanthellae yang berperan sangat penting dalam kehidupan karang. Penelitian ini bertujuan melihat pengaruh polutan khususnya hidrokarbon dan surfaktan terhadap zooxanthellae yang diisolasi dari karang Acropora aspera; Porites lutea; Montipora digitata. Perlakuan yang diberikan adalah paparan hidrokarbon (bensin) dan surfaktan sabun cair dengan konsentrasi 5, 10 and 15 % volume selama 5 menit. Hasil penelitian menunjukkan bahwa surfaktan jauh lebih toksik dibanding dengan hidrokarbon terhadap zooxanthellae. Zooxanthellae yang diisolasi dari Acropora aspera menunjukkan kemampuan bertahan yang cukup baik terhadap hidrokarbon dibandingkan dengan kedua jenis karang yang lain. Sedangkan surfaktan mematikan zooxanthellae dengan cepat pada ketiga leve perlakuan.Kata kunci: zooxanthellae, hidrokarbon, surfaktan, pencemaran, karang. Marine pollution has been frequently reported in various places around the world. This pollution directly gives a negative impact on marine life ranging from disturbance of biological processes to the mass mortality. One of the marine organisms that severely affected by marine pollution is coral which is known to live in symbiosis with zooxanthellae algae that play a very important role in coral life. This study investigates the effects of pollutants, especially hydrocarbons and surfactants on zooxanthellae isolated from corals Acropora aspera; Porites lutea; and Montipora digitata. The treatment given is exposure to hydrocarbon (gasoline) and surfactant (ordinary soap) with a concentration of 5, 10 and 15% by volume for 5 minutes. The results showed that the surfactant is much more toxic than the hydrocarbons of the zooxanthellae. Zooxanthellae isolated from Acropora aspera showed the ability to survive quite well against hydrocarbons compared with the other two types of coral. While quick exposure of surfactant has resulted in rapid mortality of zooxanthellae at all three levels of treatment. Key words: zooxanthellae, pollutants, hydrocarbons, surfactant, corals

Co-Authors - Desrina, - A Sabdono A Sabdono A. Khaerul Anam Haeril Abd. Rasyid Syamsuri Abdul Hamid A. Toha Afrinal Pilly Agus Hartoko Agus Indarjo Agus Perdana Windarto Agus Trianto Agustina L.N. Aminin Aisyah, Nurfahana Siti Aji Wahyu Anggoro Alferd Y. Ko'ou Ali Djunaedi Ali Ridlo Analis Finansi Twindiko Anastasia Dian R Andi Gilang Permadi Andreas Wahyu Gunawan P Andrianus Sembiring Anggi Arumsari Anggi Rahmadani Kusumaningtyas Angra Syafira Savana Rahmadanty Anindya Wirasatriya Anthony D Arnanda Anwar Musadad Arief Taslihan Arief Taslihan Arinda Roosma Asep Erik Nugraha Awan Setia Dharmawan Azafilmi Hakiim Azri Maya Monica Baiq Satrianingsih Bayu A Pranoto Bayu Kreshna Adhitya Sumarto Bayu Munandar Beni setyawan Budhi Kuncoro Jati Candhika Yusuf Christopher P. Meyer Cristiana Manullang Darmanto Darmanto Dedy Hartama Delianis Pringgenies Deni Darmawan Denny Nugroho Sugianto Dessy Agustina Sari Dewi Indriani Dewi, Rafiqa Diah Permata Diah Permata W Diah Permata W Diah Permata Wijayanti Didit Purnomo Dwi Haryanti Dzatihanani, Rifanatus Sarah Eduard Meirenno Tielman Efelina, Vita Eka Maya Kurniasih Eko Ahadi Eko Nurcahya Dewi Endang Supriyantini Ernani Hadiyati Ervia Yudiati Fadli Zainuddin Fahrizal Amir Fanji Helvi Permana Fauzan . Febriana Angelia Purba Gazali Salim H. Anwar, Nur Rahmah Hadi Endrawati Hadinata, Jaya Tata Hakiim, Azafilmi Hendrawan, Raffly Hendrayana Hendrayana Hilda Aprilia, Hilda Hoerunisa, Ica Ibnu Pratikto Ibnu Pratikto Ika Okta Kirana Indra Gunawan Intan Primayanti Ita Riniatsih Ita Widowati Jauhari Arifin Jebul Suroso Jidan Ahmad Danil Johan Irmansyah Julian Ransangan Justin Cullen Karisma, Dwi Pratika Kiki Fatmawati Kris Linggardini Lies Yulianto Lisa F. Indriana Lubis, Ega Khairunnisa Luchman Hakim Lutfi Despon Suprapto M. S. Adhiarsya Perdana Mada Triandala Sibero Made Sumarwati Mahadika Fanindhita Sany Makoto Tsuchiya Martina Indah Puspitasari, Martina Indah Masruroh, Dwi Mariana Mea Pradnawati Mei Olani Eka Purnomo, Mei Olani Eka Mhd Ridhon Ritonga Michael Abbey Mirsa Septiana Mutik Mohamad Anas Mohammad Zaki Suaidy, Mohammad Muhaeminullah Muhaeminullah Muhamad Umar Fahad Muhammad Dailami, Muhammad Muhammad Firdaus Muhammad Ilham Muhammad Jihaddien Daffa Muhammad Nabil Riyanto Muhammad S. Bahry Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Muinudinillah Basri, Muinudinillah Muinudinillah, M. Mujiyanto Mujiyanto Muslimin Muslimin Musrifin, Arif Yanuar Mu’alimah Hudatwi Ni Kadek Dita Cahyani Ni Made Ernawati, Ni Made Ni Putu Dian Pertiwi Noer Sasongko Nofitasari, Dwi Villa Normawati Normawati, Normawati Nugraeni, Christine Dyta Nugroho, Mulyanto Nur Achmad Nur Indah Jaya Nur Taufiq S.P.J. Nur Taufiq-Spj Nurhudaya, Nurhudaya Nursan Kamaruddin Nurul Asiah OK. Radjasa OK. Radjasa Okprana, Harly P Muhammad Yusuf Permana Ari Soejarwo Poningsih Poningsih, Poningsih Pra Luber Agung Wibowo Prakoso, Lukman Yudho Puji Eka Purnama Qolbi, Fikri Ainul R Pribadi R Pribadi Raden Ario Ramadian Agus Triyono Retno Hartati Retno Murwani Retno Murwani Ria Azizah Ridlwan Kamaluddin Rini Astuti Riyadi Aji Mustofa Rizky Rifatma Jezzi Rizqy Fadhlina Putri Rudhi Pribadi Sa?adah, Zuyyinatus Sarjiya Shinta Oktafien Sigit Sardjono Solikhun Solikhun Solikhun Solikhun, Solikhun Sri Fitria Jayusman Sri Redjeki Sri Sedjati Stefanus M S Sadana Subagiyo Subagiyo Sudarno Shobron, Sudarno Sunaryo Sunaryo Supriadi Supriadi Suranto Suranto Suryaningrum Susiani Suryono Suryono Sutiman B. Sumitro Syahrial V. Canavaro Syahrial Varrel Canavaro Syam, Dzulfikar Tiara Anggita Tiara Anggita Tivannia Pricilla Narke Triyono Triyono Vella Faizal Vincent Theodorus Siringoringo Widianingsih Widianingsih Widodo Widodo Widyanti, Widyanti Winarno Winarno Winasis Winasis Yani Lukmayani Yudistio, Kukuh Zulfiki Hidayat

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