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All Journal JOURNAL OF COASTAL DEVELOPMENT ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology GEMA TEKNOLOGI METANA Jurnal Perikanan dan Kelautan Journal of Marine Research BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Kelautan Tropis JMM (Jurnal Masyarakat Mandiri) Marine Research in Indonesia Jurnal Ilmiah Samudra Akuatika Journal of Tropical Marine Science Budimas : Jurnal Pengabdian Masyarakat Economics and Digital Business Review Journal of Applied Geology Jurnal Suara Pengabdian 45 Prosiding Seminar Nasional Unimus Journal of Fisheries & Marine Jurnal Perikanan dan Kelautan Cakrawangsa Bisnis

Retno Hartati

Department Of Marine Science, Faculty Of Fisheries And Marine Science, Diponegoro University. Tembalang Campus, Semarang, Indonesia Tel. / Fax. +6224 7474698

Author-ID : 276837

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Nursing Physics Public Health Social Sciences Veterinary Other

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Pengaruh Pengurangan Konsentrasi Nutrien Fosfat dan Nitrat Terhadap Kandungan Lipid Total Nannochloropsis oculata Widianingsih Widianingsih; Retno Hartati; H. Endrawati; Ervia Yudiati; Valentina R. Iriani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 1 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Fosfat dan nitrat mempunyai peranan penting dalam pertumbuhan dan kandungan nutrisi Nannochloropsis oculata. Kandungan lipid total dalam Nannochloropsis oculata sangat dipengaruhi oleh nutrien yang terkandung dalam media kultur. Penelitian ini bertujuan untuk menganalisis pengaruh perbedaan komposisi nutrien fosfat dan nitrat terhadap kandungan lipid total mikroalga Nannochloropsis oculata. Anova satu arah dengan 4 perlakuan dan 3 ulangan diterapkan pada penelitian ini. Pelakuan perbedaan komposisi fosfat dan nitrat yaitu Kontrol (K, fosfat dalam NaH2PO4 20 g dan nitrat dalam NaNO3 100 g), fosfat dan nitrat 75 % dari kontrol (A), fosfat dan nitrat 50 % dari kontrol (B), serta fosfat dan nitrat 25 % dari kontrol (C). Pemanenan mikroalga untuk analisa total lipid dilakukan pada fase eksponensial dan stasioner. Duaratus limapuluh mililiter media bersalinitas 35 ‰ digunakan dalam penelitian ini dengan sistem aerasi dan pencahayaan 3000 lux yang kontinyu. Hasil penelitian menunjukkan bahwa perbedaan komposisi nutrien (fosfat dan nitrat) pada media pemeliharaan berpengaruh terhadap kandungan lipid total pada fase stasioner namun tidak pada fase eksponensial. Kandungan total lipid terbesar 67,7 % dw ditemukan pada N. oculata yang dikultur pada media dengan fosfat dan nitrat 25 % dari kontrol dan yang terkecil 39,3 %-dw pada N. oculata yang dikultur pada nutrien Kontrol. Pembatasan nutrien pada media pemeliharaan dapat meningkatkan kandungan lipid total pada kultur N. oculata Kata kunci: Nannochloropsis oculata, Total Lipid, fosfat, nitrat Phosphate and nitrate play important role on growth and nutrition value of Nannochloropsis oculata. Total lipid content of microalgae Nannochloropsis oculata is influenced by nutrient content in the culture medium. This research was aimed to examine the effect of different depletion phosphate and nitrate composition on the total lipid of Nannochloropsis oculata. Anova One Way with 4 treatments and 3 replicates has been applied in this research. The treatment of differences phosphate and Nitrate composition as follows Nutrient control (Conway medium having Phospate in NaH2PO4 20 g and Nitrate in NaNO3 100 g), Nutrient A (phosphate and nitrate 75 % nutrient control); Nutrient B (phosphate and nitrate 50 % nutrient control), Nutrient C (phosphate and nitrate 25% nutrient control) The volume of culture medium was 250 mL with salinity 35‰, continuous aeration and illumination 3000 lux. The present work revealed that the nutrient composition on culture medium affected the total lipid content of N. oculata at the stationary and but not in exponential phase. The highest total lipid content (67,7%-dw) was found in N. oculata cultured in media with the lowest phosphate and nitrate concentration, in the contrary the lowest total lipid content (39,3%-dw) was happened in Control medium. Nutrient limitation in medium culture was able to increase total lipid content in the culture of N. oculata. Key words: Nannochloropsis oculata; Total Lipid, phosphate, nitrate

Kandungan Nutrisi Spirulina platensis yang Dikultur pada Media yang Berbeda Widianingsih Widianingsih; Ali Ridho; Retno Hartati; Harmoko Harmoko
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 3 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian ini bertujuan untuk mengetahui kandungan nutrisi Spirulina platensis yang dikultur pada media Walne, teknis dan kontrol. Kelimpahan S. plantesis tertinggi dicapai pada kuitur dengan media walne, demikian juga kandungan protein, karbohidrat, air, abu dan lemaknya. Pada media Walne, kandungan protein, karbohidrat dan lemak S. plantesis berturut-turut sebesar 50,05±0,53; 15,48±0,47; dan 0,51±0,12%. Sedangkan, pada media teknis, kandungan protein, karbohidrat dan lemak pada S. plantesis berturut-turut adalah 16,23±0,4; 12,57±0,22; dan 0,18±0,03%. Perbedaan ini disebabkan oleh kandungan nutrient yang ada pada media kuitur.Kata kunci : Spirulina platensis, media walne, media teknis, nutrisi

Konsumsi Oksigen Teripang Hitam (Holothuria atra) pada Sistem Statis dan Sistem Dinamis Tri Karyawati; Retno Hartati; Esti Rudiana
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 3 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Jumlah konsumsi oksigen yang diperlukan organisme untuk proses respirasi selama waktu tertentu disebut konsumsi oksigen. Konsumsi oksigen merupakan parameter fisiologi penting, karena konsumsi oksigen menunjukkan ukuran energi yang dibutuhkan untuk mendukung dan memenuhi kehidupan. Tujuan penelitian ini adalah untuk mengetahui konsumsi oksigen Teripang hitam (Holothuria atra) pada sistem statis dan sistem dinamis. Metode yang digunakan adalah eksperimental laboratoris menggunakan Rancangan Acak Lengkap(RAL) dengan perlakuan sistem statis dan sistem dinamis. Analisa yang digunakan adalah analisa Sidik Ragam dengan pengukuran berulang terhadap waktu pengamatan, sedangkan untuk mengetahui hubungan antara konsumsi oksigen terhadap waktu pengamatan menggunakan analisa korelasi. Hasil analisa data menunjukkan bahwa sistem pengukuran yang berbeda berpengaruh sangat nyata terhadap konsumsi oksigen Teripang hitam (Holothuria atra) . Konsumsi oksigen Teripang hitam (Holothuria atra) pada sistem dinamis lebih stabil daripada sistem statis.Kata kunci : Teripang hitam, konsumsi oksigen, sistem statis dan sistem dinamis.Oxygen total that used organism in respiration until certain time is oxygen consumption. The oxygen consumption is important physiological parameter, because the oxygen consumption that energy size thatneeded in the live. The purpose of reseach was to know oxygen consumption of tee sea cucumber (Holothuria atra) in static and dynamic system. The methode of reseach were experimental laboratories on completely randomized design in static and dynamic system. The analysis statistically by Analysis of Covariance with repeated measurement of time, and to know relationship between the oxygen consumption the time wereused regression analysis. The result of the reseach showed that oxygen consumption were different between static and dynamic system. The oxygen consumption of sea cucumber in dynamic system more stabil thanstatic system.Key words : Sea cucumber, the oxygen consumption, static and dynamic system

Struktur Komunitas Padang Lamun di Perairan Pulau Kumbang, Kepulauan Karimunjawa (Seagrass Community Structure of Kumbang Waters-Karimunjawa Islands) Retno Hartati; Ali Junaedi; Hariyadi Hariyadi; Mujiyanto Mujiyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 4 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Lamun merupakan salah satu ekosistem yang berperan penting dalam kehidupan di laut. Penelitian ini bertujuan untuk mengetahui struktur komunitas lamun di Perairan Pulau Kumbang Karimunjawa. Pengamatan lamun di lapangan meliputi identifikasi jenis-jenis lamun, menghitung jumlah individu/tegakan, presentase penutupan dari masing-masing jenis/spesies pada transek. Persen penutupan lamun diamati dengan menggunakan transek kuadrat ukuran 1 x 1 m pada hamparan lamun. Transek ini dibagi menjadi 25 buah kisi ukuran 20 cm2. Satu tegakan lamun merupakan suatu kumpulan dari beberapa daun yang pangkalnya menyatu. Jumlah tegakan diamati langsung dengan visual. Hasil penelitian menunjukkan bahwa Komunitas lamun di perairan kawasan Pulau Parang, Karimunjawa, tergolong komunitas campuran (mixed community) yang terdiri dari 1–5 jenis lamun. Telah ditemukan 6 jenis lamun, yaitu Thalassia hemprichii, Cymodocea rotundata, C. serrulata, Halodule pinifolia, Halodule uninervis dan Halophila ovali di perairan Pulau Kumbang, C. serrulata hanya ditemukan pada saat sampling ke dua bulan September 2012. Pada sampling pendahuluan (Juni 2012), jumlah kerapatan jenis lamun (Tegakan/m²) T. hemprichii merupakan yang tertinggi (77.11) sedangkan yang terendah adalah H. pinifolia (0.56). pada sampling kedua, H. uninervis lebih tinggi dari pada T. hemprichii. Frekuensi jenis lamun pada sampling bulan Juni dan september 2012 yang menunjukkan nilai 0-15,67 dan 0-16 dengan T. hemprichii ditemukan lebih sering dari pada jenis lamun yang lain pada kedua waktu sampling. Penutupan spesies lamun (%/m2) pada sampling bulan Juni dan September 2012 menunjukkan nilai 0,11–15.67 dan 0-29.29. Thalassia hemprichii dan Halodule uninervis mempunyai rata-rata penutupan yang tertinggi masing-masing pada sampling September dan Juni 2012.Kata kunci: lamun, jenis, kerapatan penutupan, Pulau Kumbang, KarimunjawaSeagrass is found in shallow waters that have an important role in marine life and is one of the most productive marine ecosystems. This study aims to determine the structure of seagrass communities in Kumbang Island, Karimunjawa. Data collected during observations in the field include species identification, number of individual/stand, percent cover of each species. Percent cover of seagrass was observed by using square transect with size of 1x1 m. Transect was divided into 25 pieces of smaller size i.e. 20 cm2. The stands of seagrass is a collection of several fused leaf base. The number of stands were directly counted. Sampling were done twice i.e. June and September 2012. The results showed that the seagrass community in the waters of Kumbang island, Karimunjawa, can be classified as mixed community consisting of 1-5 types of seagrass. In total, six species of seagrass were found in the area i.e. Thalassia hemprichii, Cymodocea rotundata, C. serrulata, Halodule pinifolia, Halodule ovali and Halophila uninervis. C. serrulata was only discovered during second sampling in September 2012. In the first sampling (June 2012), the density of seagrass (stand/m²) T. hemprichii was the highest (77.11), while the lowest was H. pinifolia (0.56). The results of second sampling showed that H. uninervis was found to be higher than T. hemprichii. Frequency of seagrass types in June and September 2012 showed the value from 0 to 15.67 and 0-16 with T. hemprichii was found more frequently than other types of seagrass during both sampling time. Percent coverage of seagrass species (%/m2) during June and September 2012 showed the value of 0,11-15.67 and 0-29.29, respectively. T. hemprichii and H. uninervis have the highest average percent cover in September and June 2012 sampling.Key words: seagrass, type, density, Kumbang Island, Karimunjawa

Effect of Salinities and Dietary Patterns toward Fullness of Gut and Gut Evacuation Time of the Newly Introduced Penaeus merguiensis Larvae Mostafa Imhmed Ighwerb; Johannes Hutabarat; Ervia Yudiati; Rudhi Pribadi; Widianignsih Widianingsih; Retno Hartati; Abidin Nur II; Arumning T. Fauziah; Jelita Rahma Hidayati
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.26.2.71-78

The gut capacity of shrimp larvae is minimal, and their digestion is often challenged by the inevitable fact that they tend to develop slowly during the zoea stage. Many studies approved that the digestive capacity of shrimp larvae could be improved by increasing the retention time of food in the intestine. Gut evacuation time and fullness of the gut are crucial parameters in assessing the growth of shrimp larvae, and the diet as well as environmental conditions indeed influence the activity of these parameters. Although many species of shrimps have a wide salinity tolerance, more specific research on salinity and its relation to the type of diet is necessary to find the optimum condition supporting the growth of shrimp larvae. By employing Penaeus merguiensis larvae, this study evaluates the effect of three nominal salinities (28, 32, and 36 ppt) and types of diets (Diet A: 100% live feed; Diet B: 100% FRIPPAK; Diet C: a combination of Diet A and Diet C, 50 % each) toward the fullness of gut and gut evacuation time of the newly introduced Penaeus merguiensis larvae culture. The result showed that the longest gut evacuation time and the highest percentage of gut's fullness were found in all Zoea reared with Diet A at salinity 28 and 32 ppt; Zoea-1 at 28 ppt with Diet A; Zoea-2 at 32 ppt with Diet A; Zoea-3 at 32 ppt with Diet A. Longer gut evacuation time would have an impact on the higher percentage of the fullness of gut. The higher fullness of the gut also indicates that the larvae have the best capacity to produce energy and achieve optimum growth.

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

Pemangsaan Propagul Mangrove Rhizophora sp. Sebagai Bukti Teori Dominance-Predation (Predation of Mangrove Propagule, Rhizophora sp. as Evidence of Dominance-Predation Theory) Rudhi Pribadi; Achmad Muhajir; Widianingsih Widianingsih; Retno Hartati
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 19, No 2 (2014): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Pemangsaan sering mentebabkan kegagalan propagul mangrove untuk tumbuh menjadi individu baru. Pemangsaan terjadi saat propagul masih bergantung pada pohon induk atau pra-penyebaran maupun setelah terlepas dan jatuh dari pohon induk atau paska-penyebaran. Penelitian ini bertujuan untuk mengetahui tingkat pemangsaan propagul Rhizophora mucronata Lamk., R. stylosa Griff. dan R. apiculata Blume di Desa Pasar Banggi, Kabupaten Rembang, Jawa Tengah. Penelitian terdiri dari 3 tahap yaitu penelitian pendahuluan untuk mengetahui dominasi spesies, penelitian deskriptif pada pra-penyebaran tentang pemangsaan propagul pra-penyebaran dan penelitian eksperimental untuk mengetahui hubungan antara dominasi spesies dengan tingkat pemangsaan propagul paska-penyebaran. Tingkat pemangsaan propagul pra-penyebaran R. stylosa terbukti paling tinggi tingkat pemangsaannya yaitu 61,06% (kisaran 45,40-76,05%), disusul R. apiculata 58,18% (47,41-68,00%) dan terendah R. mucronata 11,88% (7,06-15,71%). Selama 18 hari pengamatan tingkat pemangsaan propagul R. stylosa paling rendah di stasiun yang didominasi R. stylosa (46,67%) dibandingkan di stasiun yang di dominasi R. apiculata (63,33%) maupun R. mucronata (83,33%). Pemangsaan propagul R. mucronata paling tinggi di stasiun yang didominasi R. mucronata (95%) dibandingkan di stasiun yang di dominasi R. apiculata (55%) maupun R. stylosa (45%). Pemangsaan propagul R. apiculata paling rendah di stasiun yang didominasi R. apiculata (50% ) dibandingkan di stasiun yang di dominasi R. stylosa (70%) maupun R. mucronata (73,33%). Hasil penelitian ini berhasil membuktikan teori dominance-predation pada spesies R. stylosa dan R. apiculata, namun tidak pada R. Mucronata. Kata kunci: pemangsaan, propagul, pra-penyebaran, paska-penyebaran, mangrove Propagule predation on mangrove in some extent reduced its viability to grow into seedling. The predation could happened before (pre-dispersal) or after (post-dispersal) the propagule drop from the tree.The reasearch was conducted in Pasar Banggi, Rembang District, Central Java. The aim was to investigate the predation rate of Rhizophora mucronata Lamk., R. stylosa Griff. and R. apiculata Blume propagules pre-dispersal and post-dispersal. Firstly, preface experiment for find domination spesies in the location, Second, with applied descriptive-based survey sampling and field experiment methods. Than all propagules of five replication trees were harvested and checked for its condition on pre-dispersal step. The third, with post-dispersal study there were twenty propagules from each spesies and tied them with used nylon string and placed on the forest floor for 2 until 18 days and checked its condition every 2 days after placement. This study is also set for tested the Smith’s theory on propagule predation related to tree domination. Rhizophora stylosa propagule was most predated before they fall (mean 61,06%, range 45,40-76,05%), followed by R. apiculata (mean 58,18%, range 47,41-68%) and the lowest isR. mucronata with mean 11,88% (range 7,06-15,71%). After 18 days of experiment in the field R. stylosa propagule in R. stylosa–dominated area was the lowest predated (mean 46,67%) compared to propagule in the area dominated by R. apiculata (63,33%) and also in R. mucronata area (83,33) Predated R. mucronata propagule is the highest in the R. mucronata dominated area (mean 95%) compared with R. apiculata dominated area (mean 55%) and also in R. stylosa dominated area (45%). Pradated of R. apiculata propagule is the lowest in the domination area of R. apiculata (50% ) compared with R. stylosa area domination with (mean 70%) also R. mucronata (73,33%). The result showed that the theory of dominance-predation can be proved only for R. stylosa and R. apiculata spesies, but not for R. mucronata spesies. Keywords : propagule, predation, pre-dispersal, post-dispersal, mangrove

Phytoplankton community structure and it’s relationships with water quality in Bangka Island, Indonesia Muh Yusuf; Robin Robin; Wahyu Adi; Mu’alimah Hudatwi; Widianingsih Widianingsih; Retno Hartati; Robertus Triaji Mahendrajaya; Cristiana Manullang
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 26, No 1 (2021): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.26.1.37-44

Phytoplankton plays an important role in primary productivity in marine environment. Various environmental changes in coastal area will impact the water quality and their phytoplankton compositions. The purpose of this study is to examine the abundance of phytoplankton from two different sites, i.e Tanah Merah (close to mining site) and Semujur Island (away from mining site) in Bangka Island. Phytoplankton and water sample were collected on June- August 2018. Water quality was measured using water quality checker, whereas the phytoplankton was identified under the microscope with a magnification of 100x. Non-parametric Kruskal test and T-test analysis was performed to determine the abundance, diversity, uniform, and dominance of phytoplankton between Sites, respectively. Statistical analyses showed the abundance of phytoplankton at Semujur Island was significantly higher than that at Tanah Merah (p = 0.003). In additions the diversity, uniform, and dominance were also significantly different between sites (all p <0.05). In Semujur Island, Diatoms (Thalassiothrix, Chaetoceros and Thalassionema) were more dominants than the Dinophyceae group. However, in Tanah Merah, the genera Ceratium belong to class Dinophyceae was more dominant than the class Bacillariophyceae. These results performed that the phytoplankton in Tanah Merah and Semujur Island was affected by environment, in this case the mining area. The water quality in Semujur Island (non-mining Area) might have good quality than in Tanah Merah (mining area). The average value of turbidity and Total Suspended Solid in Tanah Merah Waters causes low abundance of phytoplankton. It can be concluded that tin mining can disrupt the abundance and composition of phytoplankton as a primary producer of waters.

Pengaruh Diameter Tali Polyethilen Sebagai Kolektor Terhadap Jumlah dan Ketahanan Penempelan Spat Tiram Mutiara (Pinctada maxima) Anindya Wirasatriya; Ita Widowati; Retno Hartati
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 2 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Pemeliharaan spat merupakan salah satu kegiatan dalam pembenihan tiram mutiara. Masa peralihan antara larva menjadi spat merupakan masa yang kritis, dimana terjadi perubahan sifat organisme dari planktonis menuju sesil bentik. Pada masa ini kolektor yang sesuai sangat dibutuhkan sebagai tempat penempelan spat. Penelitian pendahuluan menunjukkan bahwa tali polyethilen merupakan bahan kolektor yang cukup baik untuk penempelan tiram mutiara, tetapi belum ada informasi mengenai diameter tali yang digunakan. Penelitian inibertujuan untuk mengetahui diameter tali polyethilen yang terbaik untuk penempelan spat tiram mutiara (Pinctada maxima) ditinjau dari jumlah dan ketahanan spat yang menempel.Penelitian ini bersifat eksperimentaldengan 5 perlakuan. Kolektor tali polyethilen dengan 5 diameter tali yang berbeda yaitu 500mm, 1500mm, 2500mm, 3500mm dan 5000mm disediakan sebagai tempat penempelan spat. Hasil penelitian menunjukkan bahwa diameter tali polyethilen terbaik untuk spat kolektor adalah 500mm dan 1500mm. Pada diameter 500mm, jumlah rata-rata penempelan spat mencapai 134,67 ekor dan persentase rata-rata spat yang terlepas pada uji ketahanan mencapai 8,42 %. Sedangkan pada diameter 1500mm jumlah rata-rata penempelan spat mencapai 138,33 ekor dan persentase rata-rata spat yang terlepas pada uji ketahanan mencapai 9,16%.Kata kunci : Tali PE, Spat Pinctada maxima, Jumlah dan Ketahanan PenempelanMaintaining spat is one of parts done in pearl oyster hatchery . The transition period from larval to spat is a critical period due the change of the planktonic character to the sesile benthic character. In this period, theavailable collector is needed for spat attachment. The formerly reseach showed that polyethilen rope was good enough for spat attachment but there was no information about the diametre that been used. Thepurpose of this research is to know the best diametre of polyethilen rope as collectors of pearl oyster spat (Pinctada maxima) attachment , viewed from the number and strength of spat attachment.The character ofthis research is experimental with 5 treatment. For spats attachment, collectors from polyethilen rope with 5 different diametres were prepared. They were 500mm, 1500mm, 2500mm, 3500mm and 5000mm. The result of the research showed that the best diametre of polyethilen rope for spat collector were 1500mm and 500mm. In 500mm diametre the mean number of spat attachment was 134, 67 and the mean percentage of falling spat in strength test was 8,42 %. In 1500mm diametre the mean number of spat attachment was 138,33 and the mean percentage of falling spat in strength test was 9,16 %.Key words : PE rope, Pinctada maxima Spat, Number and Strength of attachment

The Growth of Sea cucumber Stichopus herrmanni After Transverse Induced Fission in Two and Three Fission Plane Retno Hartati; Widianingsih Widianingsih; Hadi Endrawati
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 21, No 2 (2016): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Transverse induced fission proven could be done in Teripang Tril, Stichopus herrmanni. This present works aimed to analyze wound recovery, regeneration period and growth of Teripang Trill after asexual reproduction by fission using two and three fission plane. Observations were made every day until the sea cucumber body separated into two or more (depending on treatment) and reared for 16 weeks. The results showed that there are differences in wound recovery, regeneration period and growth of S. herrmanni depend on their different fission plane. The wound recovery and regeneration period (days) of anterior, middle and posterior individu S. herrmanni resulted from two and three fission plane were varied but the two fission plane the anterior individu recover for longer period than posterior part and the wound recover process in both end for thee fission plane was same. Average growth of anterior and posterior fragment were longer for two fission plane than three fission plane. The middle fragment (M1 and M2) both fission plane was able to grow but very low. It showed that three fission plane gave very slow growth in every fragment of the body. Keywords: growth, post-fission, fission plane, Stichopus herrmanni

Co-Authors Abdul Ghofir Abdul Hadi Abdul Latif Mahakar Abdul Muis Prasetia, Abdul Muis Abdullah Afif Abdullah Afif Abidin Nur II Achmad Muhajir Adi Santoso Adiyoga, Diaz Agus Sabdono Agus Trianto Agustiningsih, Luluk Akbarinissa, Rr. Dyah Artati Akhmad Syarifudin Aklif Reza Muttaqin Aldion Adin Nugroho Ali Djunaedi Ali Djunaedi Ali Junaedi Ali Ridlo Altysia Putriany Amalia Rofiah Amalia Rofiah Amar, Fahri Ambariyanto Ambariyanto Anak Agung Istri Sri Wiadnyani Anam, Aufa Anastasia Dian R Anindya Wirasatriya Antonius Budi Susanto Apriliani, Seka Indah Ariel E San Jose Arif Rahman Arumning T. Fauziah Aufa Anam Azizah T.N., Ria Bastiar, Yusuf Bifa Aulia Manuhuwa Bintang Septiarani Broto Wisnu RTD Broto, R. T.D Wisnu Candhika Yusuf Cantik Sitta Devayani Cantika Elistyowati Andanar CB. Ronaldi Chandra E Chrisna Adhi Suryono Chrisna Adi Suryono Cristiana Manullang David Nugroho Delianis Pringgenies Delianis Pringgenies Denny Nugroho Sugianto Dharma, Laga Adhi Diah Permata Wijayanti Diaz Adiyoga Dina Ayu Magfirani Dinda Richa Kumarahaqi Donna Nur'Aurelya Mahardhika Dwi Haryanti, Dwi Dwi Saniscara Wati Edi Supriyo Edi Wibowo Edi Wibowo Kushartono Edi Wibowo Kushartono Edy Supriyo Edy Supriyo Edy Supriyo Edy Wibowo Edy Wibowo Elis Indrayanti Endika Meirawati Erik Wijaya Kusuma Ervia Yudiati Esti Rudiana Ety Parwati Ety Parwati Ety Parwati Fitriyan, Jodhi Kusumayudha Frijona Fabiola Lokollo Gangsar Bayu Setia Nugroho Gangsar Bayu Setia Nugroho Gazali Salim Ginzel, Fanny Iriany Gunawan Widi Santosa H. Endrawati Hadi Endrawati Hadi Endrawati Haniâ€™atun Nurfajriyah Hariyadi Hariyadi Harmoko Harmoko Haryo Farras Raditya Hutama Hawa, Adnin Kamil Bani Heri Yanti Hermawan Hermawan Hermawan Hermawan Hermin Pancasakti Kusumaningrum Hilal M I Wayan Warmada Ibnu Pratikto Ibnu Pratikto Ika Desie Wulandari Ira Kolaya Ira Kolaya, Ira Ireng Sigit Atmanto Irwani Irwani Isai Yusidarta Isti Pudjihastuti Ita Riniatsih Ita Widowati Itsna Yuni H Jelita Rahma Hidayati Johannes Hutabarat Jufri Ubay Julian Ransangan Jussac Maulana Masjhoer Justin Cullen Jusup Suprijanto Jusup Suprijanto Jusup Suprijanto Käll, Sofia Ken Suwartimah Ken Suwartimah Khairunnisa Khairunnisa Khoerunnisa, Rizka Nabila Kholilah, Nenik Koen Praseno Koen Praseno Kusuma, Erik Wijaya Laras Kinanti Pinandita Lilik Maslukah M. Andry Herdiatma M. Andry Herdiatma Madhu Pinastika Puji Lestari Madhu Pinastika Puji Lestari, Madhu Pinastika Puji Magfirani, Dina Ayu Mahakar, Abdul Latif Mahfud Mahfud Manuhuwa, Bifa Aulia Mas’ad Arif Mayestika, Pingkan Meitri Bella Puspa Mostafa Imhmed Ighwerb Muchammad Miftahul Ulum Muchammad Miftahul Ulum Muhammad Yusuf Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Muji Wasis Indriyawan, Muji Wasis Mujiyanto Mujiyanto Mustalafin Mustalafin Mu’alimah Hudatwi Nando Arta Gusti Pamungkas Narendra Prasidya Wishnu Natasya Erdza Aulia Ningrum, Malinda Satya Nirwani Soenardjo Njurumana, Steven Nggiku Norma Afiati Nugroho, Suciadi Catur Nur Taufik SPJ Nur Taufiq Nur Taufiq-Spj Orisu, Anthon Apolos Parameswari Iccha Nirmalabuddhi Wishnuputri Petta, Constantein Philipus Uli Basa Hutabarat Pingkan Mayestika Pingkan Mayestika Pradina Purwati Pradina Purwati Pratama, Candrika Primaswatantri Permata Putri Novianingrum, Milka Putri, Dhiya Aflah Luswanto Putri, Ni Putu Purba Nava Vidyadhari Putriningtias, Andika Raden Ario Rafsanjani A. Karim Rafsanjani A. Karim Raka Pramulo Sophianto Ramadhani, Muhammad Rizqi Reny Yesiana Retno W. Astuti Ria Azizah Ria Azizah Ria Azizah Ria Azizah Ria Azizah Tri Nuraini Rizky Imtihan R. Rizky Imtihan R., Rizky Imtihan Robertus Triaji Mahendrajaya Robertus Triaji Mahendrajaya Robertus Triaji Mahendrajaya Robin Robin Rohmah, Ivatur Rotua Malau Rozi Rr. Dyah Artati Akbarinissa Rudhi Pribadi Rudi Pribadi Sarah Nabilla Sari Budi Moria Sartika, Linda Selvi Marcellia Septiani, Nur Alifah Seto Haryoardyantoro Sitti Hartinah DS Sophianto, Raka Pramulo Sri Redjeki Sri Redjeki Sri Redjeki Sri Yulina Wulandari Subagiyo Subagiyo Subagiyo Subagiyo Sugiyanto Sugiyanto Sugiyanto Sugiyanto, Nenden Rose Suryono Suryono Sutrisno Anggoro Tarigan, Ariyo Imanuel Taufiq-Spj, Nur Tiara Nur Baeti Baeti Tri Karyawati Tria Nidya Pratiwi Ubay, Jufri Ulfah Nurjanah Ulfah Nurjanah Ulfah Nurjanah, Ulfah Umi Fatimah Valentina R Iriani Valentina R. Iriani W.L. Saputra Wahyu Adi Wahyudi, Yudisthio Wibowo, Muhammad Reyhan Widianingsih Widianingsih Widianingsih Widianingsih Widianingsih Widianingsih, - Wilis Ari Setyati Wilis Ari Setyati Wishnuputri, Parameswari Iccha Nirmalabuddhi Wita Kristianty Sirait Yasir, Moh. Yoki Ristadi Yoko Nozawa Yosi Yananda Sijabat Yudho Prasetyo Yunita Anggarini, Yunita Zulfiandi Zulfiandi Zulfiandi Zulfiandi

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