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Jurnal Ilmu dan Teknologi Kelautan Tropis

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Published by Institut Pertanian Bogor

ISSN : 20879423 EISSN : 2620309X DOI : https://doi.org/10.29244/jitkt

Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Library & Information Science

Aims and Scope Journal of Tropical Marine Science and Technology (Jurnal Ilmu dan Teknologi Kelautan Tropis) is a scientific journal in the field of tropical marine science and technology. We have a aims and scope to focus in publishing a good quality scientific articles for dissemination of research results in the field of marine science and technology. Aims As an media of information and dissemination of research results in the field of marine science and technology, especially in the waters of Indonesia and Southeast Asia region, Could actively and continuously disseminate the best research results to various stakeholders, and; This Journal of Tropical Marine Science and Technology can improve the quality of research results and benefit stakeholders. Scope The article, published in this Journal of Tropical Marine Science and Technology covers a wide range of research topics in the field of: marine biology, marine ecology, biological oceanography, chemical oceanography, physical oceanography, dynamical oceanography, coral reef ecology, marine acoustic, marine remote sensing, marine geographical information system, marine microbiology, marine polution, marine aquaculture, post-harvest fisheries technology, integrated coastal management (ICM) marine biotechnology, air-sea interaction, ocean engineering,

Arjuna Subject : Umum - Umum

Articles 656 Documents

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DIVERSITY OF SEA CUCUMBER (ECHINODERMATA: HOLOTHUROIDEA) IN SABU RAIJUA WATERS, SABU ISLAND, EAST NUSA TENGGARA Marcelien Dj Ratoe Oedjoe; Crisca B. Eoh
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Sea cucumber has an ecological function as an organic decomposer in sediment and nutrient producer within a food chain. In addition, sea cucumber has also economic values as fisheries and trade commodities. The pupose of this research was to investigate diversity of sea cucumber in the Sabu Raijua waters, East Nusa Tenggara Province. Samples were collected from Sabu Raijua waters in July -August 2014 using transect quadrant of 1x1 m2 during the lowest low tide in daytime at 13:00-16:00 and nighttime at 18.00-22.00 Central Standar Local Time. Data analyses on the sea cucumber were based on composition, density, distribution, and eating habits. The results showed that there were 8 species that can be classified into 3 families i.e., the Holothuridae (Holothuria nobilis, Holothuria scabra, Holothuria atra, Holothuria edulis, Holothuria impatiens, and Holothuria leucospilato); the Actinopyga (Actinopyga lecanora); and the Bohadshia (Bohadschia argus). The density of Holothuria nobilis was 5.651 individual/m2, Holothuria atra of 4.409 individual/m2, Holothuria scabra of 3.294 individual/m2; Holothuria edulis of 3.102 individual/m2; Bahaschia argus of 2.102 individual/m2; Holothuria mexicana of 2.088 individual/m2; Holothuria impatiens of 2.044 individual/m2; and Actinopyga lecanora of 1.037 individual/m2. Of these sea cucumber species, 17.3% were distributed on sandy substrate and 82.7% on seagrass and coral subtsrates. All sea cucumber species have a posi-tive association with its environment indicating that the water quality was still in a good condition. Keywords: sea cucumber, association, diversity, composition, distribution

ON SEAWEED CULTURE BASED COASTAL AREA DEVELOPMENT IN WEST SUMBAWA REGENCY Rusmin Nuryadin; Kadarwan Soewardi; . Yonvitner
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Seaweed cultivation is one of current coastal development activities in the west Sumbawa regency. Coastal region in the west Sumbawa regency that be used for seaweed cultivation was about 1,550 ha, however, its utilization was still limited of about 536 ha (34.58%). Seaweed farming activities were only carried out in some locations of the subdistrict of Taliwang and Pototano, west Sumbawa. Sustainability analysis of seaweed cultivation was done by Multidimensional scaling method using Rapid Appraisal Seaweed (Rapseaweed). Based on sustainability status of seaweed cultivation, the long line methods was less sustainable with sustanability index of 49.28 and the ‘anchored’ method produced better sustainability of 61.02 index value. A technological dimension is needed for seaweed farming development in order to produce better sustainability. Other dimensions for seaweed farming improvement are ecological, economic, social, and institutional. To reach a sustainable seaweed cultivation in the west Sumbawa regency, farmers and other stake holders should increase the utilization of available coastal region for seaweed farming activities by having the availability of the market and seeds, guarantees access to capital, increasing skills and knowledge of farmers, provide the drying and storage facilities, and develop the seaweed processing industry. Keywords: seaweed, value index, sustainability status, Rapseaweed

TIDAL RANGE CALCULATION BASED ON THE LOCAL KNOWLEDGE OF THE SAMA ETHNIC GROUP IN THE EASTERN INDONESIA . Salnuddin; I Wayan Nurjaya; Indra Jaya; Nyoman M.N. Natih
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The Sama ethnic group (Bajo) is well known as “Indonesian marine people” that dominantly spreaded in coastal region of eastern Indonesian region. Their activities have been adapting with the territorial water as shown in the determination of their home floor height to prevent from the tidal flood. The purpose of this study was to examine the accuracy of the tidal range calculation by local knowledge of the Sama ethnic group (Sama Ethnic Method, SEM). The analysis was done by comparing tidal range result calculated by the Sama Ethnic Method (SEM) with the standardized tidal harmonic constituents. The result showed that the 2nd tidal peaks (DLB-s) in the 15th “Sya’ban” date was the best date to do measurement of a tidal range. In this case, the “Likkas Silapas” (LS) value at the above date was above the mean height water level (MHWL). Meanwhile, in other dates, the LS value was under MHWL value. The result also showed a strong correlation (R2> 90%) between rasio of tidal high on 1st and 2ndpeaks (DLB-s/DLB-m) on 15th Sya’ban date and LS-s value. The local knowledge of the Sama Ethnic Method to determine the tidal range was effective and scientifically proven. Keywords: the Sama Ethnic group, tidal range, Likkas Boe, Likkas Silapas, Sya’ban

DISTRIBUTION OF GASTROPODA AND ITS RELATION WITH ENVIRONMENTAL CHARACTERISTICS IN COASTAL WATERS OF NUSALAUT ISLAND, CENTRAL MALUKU Muhammad Masrur Islami
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Nusalaut Island is one of the small islands in Maluku waters that is influenced by the dynamics of Banda Sea. The aim of this study was to investigate the density and spatial distribution of gastropods and its relation with environmental characteristics using multivariate analysis i.e., Principal Component Analysis (PCA) and Correspondence Analysis (CA). This study was conducted in Nusalaut Island as a part of Marine Resources Inventory Programme in Nusalaut Island in 2009. Fieldwork was conducted in northern Nusalaut Island using systematic random sampling method. Results showed that the highest density was Nassariidae family and other low density were from the familes of Cerithiidae, Buccinidae, Terebridae, and Conidae, respectively. The environmental characteristics affected species composition and density of gastropods. Distribution of environmental characteristics and spatial distribution of gastropods at each station was influenced by a combination of several parameters. Microhabitat pattern, predatory, and human activities also affected the distribution of gastropods. Keywords: gastropoda, spatial distribution, environmental characteristics, Nusalaut Island

PHOTOPROTECTIVE EFFECT OF SUNSCREEN CREAM WITH ADDITION OF CARRAGEENAN AND BLACK MANGROVE FRUIT (Rhizopora mucronata Lamk.) Sri Purwaningsih; Ella Salamah; M. Nur Adnin
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The need of people’s face protection from sun exposure is continuosly increasing. However, the available sunscreen in the market are mostly chemicaly generated. Seaweed (Kappaphycus alvarezii) produced carrageenan, which can be used as stabilizer, thickener, and emulsifier on sunscreen production. Black mangrove fruit (R. mucronata) contains an antioxidant activity, tanin, flavonoids, and phenolic compounds, which are potential to be used for UV light absorber as well as skin protector. The aims of this research were to determine: (1) the best carrageenan concentration in the cream; (2) content of total phenol, flavonoids, and tannin of mangrove fruit extract; and (3) Sun Protection Factor (SPF) value of sunscreen cream. The experiment used a complete random design and with Duncan test. The result showed that the best natural sunscreen formulation was an addition of 0.5% carrageenan and 1% extract from R. mucronata. The best characteristics of natural sunscreen were found within the level of 7.62 pH, 38.250 cP viscosity, 100% emulsion stability, 3.72% shrinkage, and <102 colonies/g total microbial, 10.21 ± 0.06 SPF content, 37.90% total phenol, 0.51% total flavonoids, and 6.20 mg/g tannins. Keywords: antioxidant, carrageenan, flavonoids, Rhizophora mucronata, SPF

DYNAMIC OF SEA LEVEL ANOMALY OF INDONESIAN WATERS Bisman Nababan; Sri Hadianti; Nyoman M.N. Natih
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

A trend in sea level rise as a result of global warming could be a threat to small islands and coastal areas in Indonesia. The objective of this study was to determine the trend and variability of mean sea level anomaly (MSLA) in Indonesian waters during the 20 years of observation. The data used in this study were monthly MSLA data obtained from the AVISO website (ftp://ftp.aviso.oceanobs.com). Supporting data were the Southern Oscillation Index (SOI) (http://www.gom.gov.au/climate/enso), Dipole Indian Mode (DIM) index (http://gcmd.nasa.gov/records/GCMD_Indian_Ocean_Dipole.html), and the Pacific Decadal Oscillation (PDO) index (http://research.jisao.washington.edu/pdo/). Eigth stations of Indonesian waters were selected to study the variability of MSLA. In general, MSLA variabilities of Indonesian waters had a seasonal pattern, positively correlated with the SOI index, and negatively correlated with DIM and PDO indexes. The partial correlation of DIM was more dominant in west of Sumatra (r=-0.52) and south of Java (r=-0.44), PDO was more dominant in the northern waters of Papua (r=-0.37) and Makassar Strait (r=-0.33), and SOI was more dominant in northern Papua (r=0.52) and less toward the west of Indonesian waters. Overall, the MSLA variability of Indonesian waters can be explained by the variabilities of SOI, DIM, and PDO indexes with the lowest value in Natuna waters by 12% (R2=0.12) and the highest value in the northern waters of Papua by 54% (R2=0.54). Interannual variabilities were observed during ENSO events (SOI<-10) along with the maximum value of DIM index resulted in the lowest value of MSLA. Meanwhile, the highest value of MSLA was found during La Nina events (SOI>10) in conjunction with a minimum value of DIM and PDO indexes. The average rate of sea level rise in Indonesian waters was 5.84 mm/yr, almost two times higher than the average rate of global sea level rise (3.2 mm/yr). Keywords: mean sea level, anomaly, SOI, DIM, PDO, interannual, ENSO

VERTICAL DISTRIBUTION OF NUTRIENTS ON TRANSITIONAL SEASON IN WEDA BAY, NORTH MALUKU Faisal Hamzah; Abdul Basit; Iis Triyulianti
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

A vertical distribution of nutrient shows an interaction of physical processes, source, and uptake along the water column. These interactions can occur along the water column with different processes in each layer. Water samples from 17 stations were collected for nitrate, phosphate, and silicates concentration analyses during the transitional season in the Weda Bay. During the transitional season, the Weda Bay was characterized by low salinity (33.55-34.10), relatively warm temperature (30.87°C), and the relatively low nutrient concentrations (nitrate=0.03-4.87 µg at/l, phosphate=0.011-0.852 µg at/l, and silicate=0.04-1.21 µg at/l). The present of Western North Pacific Ocean (WNPO) watermass and the influence of Southern Subtropical Lower Water (SSLW) producing high salinity (>35) at the depth of 130-300 m were observed along the Weda Bay. Nutrient geochemical processes in this region were shown by nutrient utilization and regeneration across the water columns. Nutrients utilization was relatively high in the surface layer. Meanwhile, nutrients regeneration and remineralization were more dominant in the thermocline and deeper water layers. Analyses of nutrients showed that nitrate was more dominant than other nutrients with N/P ratio was 3.83-37.99 and N/Si ratio was 0.12-10.98. The effectiveness of silicate (0.25 μg at/l) that was used by phytoplankton found at a depth of 200 m when its concentration decreased at N/P ratio (16:08) close to the Redfield ratio. Due to an uptake, remineralization, and regeneration processes in each layer, a nutrient distribution pattern was formed which the nutrient concentrations decreased in mixed layer and increased in the deeper water.Keywords:nutrien, pattern, Weda Bay, transitional season

SOCIAL-ECOLOGICAL SYSTEM OF SEAGRASS AND SMALL-SCALE FISHERIES CONNECTIVITY IN MALANG RAPAT AND BERAKIT VILLAGES, BINTAN DISTRICT, RIAU ISLANDS Muhammad Nur Arkham; Luky Adrianto; Yusli Wardiatno
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Seagrass ecosystem has important roles in ecological and social factors to support fisherman income. The purpose of this research was to map the social-ecological system connectivity of seagrass with small-scale fisheries with networks perspective, to identify social-ecological connectivity of seagrass with fisheries resource availability approaches in small-scale fisheries, and to estimate the benefits of fish resources relation to seagrass ecosystem in Malang Rapat and Berakit vilages. Social-ecological system connectivity of seagrass was proven by the spatial distribution of fishing areas, networks map markets, and dynamics of small-scale fisheries catches in the study site. Social-ecocoligal connectivity of seagrass was also proven by fish catches dominated by Siganidae, Scaridae, Lethrinidae, and Lutjanidae families. The fishermen income was supported by seagrass ecosystem connectivity which contributed revenue from fish catches totally Rp 202,124,00/day in Malang Rapat village and Rp. 193,151,00/day in Berakit village. Other benefit of seagrass ecosystem located nearby the beach was that the fishermen can have an easy access or less fuel for fishing operation.Keywords: seagrass ecosystem, network map, connectivity, small-scale fisheries, social-ecological system, Riau islands

CONCENTRATION HEAVY METALS (Cu AND Pb) IN MUSI RIVER ESTUARY Wike Ayu Eka Putri; Dietriech G. Bengen; Etty Riani
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The Musi River is one of the biggest river of twelve big rivers in South Sumatra Province. Water quality of this river affects the water quality in the estuary and biological health in its surrounding so that it is important to determine the Cu and Pb concentrations. The purposes of this study were to analize distribution of heavy metals (Cu and Pb) and to determine the water quality status in March and September 2014. The water and sediment samples were collected from eight stations along the Musi River from downstream to the estuary. Heavy metal concentration was analized by employing USEPA 30050B method using AAS Spektra plus variant with air mixure flame – acetylene. Dissolved Cu and Pb concentrations in March were 0,002 - 0,006 mg/l and 0,002-0,003 mg/l, respectively, while in September were 0,001-0,010 mg/lfor Cu and 0,001-0,005 mg/lfor Pb. Cu and Pb concentrations in sediment detected in March were 6,92-16,4 mg/l and 1,9-11,4 mg/l, respectively, while in September were 2,3-13,9 mg/l for Cu and 4,29-9,95 mg/l for Pb. Student test analysis showed that was no significant differences between Pb and Cu concentrations (dissolved and sediment) between March and September. Generally, the concentration of heavy metals Cu and Pb in Musi River estuary were still below specified quality standards.Keywords: heavy metal, Cu, Pb, the Musi River, estuary

BACTERIAL SYMBIONT BIOACTIVE COMPOUND OF SOFT CORAL Sinularia flexibilis AND S. polydactyla . Rozirwan; Dietriech G. Bengen; . Chaidir; Neviaty P. Zamani; Hefni Effendi
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Symbiont bacteria on soft coral can produce bioactive compounds that plays an important role in chemical ecology and as a marine natural product. The purpose of this study was to find and characterize the antibacterial activities of active compounds extracted from bacterial symbionts of soft coral S. flexibilis and S. polydactyla. The methods used in this study were culture and isolation of bacterial symbionts, extraction of compounds, antibacterial bioassay, and identification of bioactive compounds using the LC-MS analyses. Four isolates of bacterial symbionts were obtained from two samples of soft corals, 2 isolates of Pseudomonas diminuta (A1) and Edwardsiellla hoshinae (A2) from soft coral S. flexibilis, and 2 isolates of E. hoshinae (B1) and P. acidovorans (B4) from S. polydactila. Antibacterial activity were found only from the extracts of bacterial symbionts P. diminuta (A1) and from S. flexiblis about 10.16 ± 0.3mm (for B. subtilis), 8.66 ± 0.8 mm (E. coli) and 9.86 ± 1.7mm (S. dysentri). No antibacterial activity found from the extracts of S. polydactyla. The results of LC MS analysis showed that the group of diterpenes sinularin produced by soft corals S. flexibilis and bacterial symbionts isolates of P. diminuta (A1).Keywords: Bacterial Symbiont, Bioactive Compound, Antibacterial Activity, Soft Coral, Sinularia flexibilis, Sinularia polydactyla

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Dietriech G. Bengen

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Contact Name Dietriech G. Bengen

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Editorial Address Departement of Marine Science and Technology Faculty of fisheries and marine science, IPB University Jln. Lingkar Akademik, Kampus IPB Darmaga, Bogor 16680, Indonesia

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Contact Name
Dietriech G. Bengen

Contact Email
dieter@indo.net.id

Phone
+62251-8627323

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dieter@indo.net.id

Editorial Address
Departement of Marine Science and Technology Faculty of fisheries and marine science, IPB University Jln. Lingkar Akademik, Kampus IPB Darmaga, Bogor 16680, Indonesia

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Kota bogor,

Jawa barat

INDONESIA