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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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THE COMPOSITION AND DISTRIBUTION OF BENTHIC FORAMINIFERA AT CORAL REEF ECOSYSTEM IN THOUSANDS ISLAND Lumban Nauli Lumban Toruan; Dedi Soedharma; Kresna Tri Dewi
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Composition and distribution of foraminifers are affected by human activities and have close association with coral reef ecosystem. The aims of this research were to investigate the benthic foraminifers’ composition and distribution in sediment of coral reef ecosystem. Eleven stations of Karang Bongkok, Pramuka, and Onrust Island were observed in this study. The sediments were taken from surface substrate up to 2 cm under the substrate. Samples were washed on sieve with mesh size 0,063 mm, and then dried in oven with 50°C of temperature for two hours. After separating from the sediment, the foraminifers were laid on foraminiferal slide and indentified using binocular microscope. The highest composition of symbiont-bearing foraminiferal assemblages which associated with reef ecosystem was in East Pramuka (78.17%) and the lowest was in South Onrust (21,83%). The opportunistic type had the highest composition in South Onrust (38.67%) and the lowest was in South Karang Bongkok. In west Pramuka had the highest composition of heterotrophic type (57.17%) and the lowest was in North Onrust (11.33%). Onrust Island was dominated by opportunistic type, indicating high nutrient. The highest amount of foraminifers’ taxa was found in Karang Bongkok with good coral reef coverage, while the lowest in Onrust facing with Jakarta Bay. Keywords: composition, distribution, benthic foraminifers, coral reef.

THE CHARACTERISTIC OF DEEP SEA FORAMINIFERAL COMMUNITY IN TOMINI BAY, SULAWESI Kresna Tri Dewi; Mustafa Hanafi
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

A total of 14 sediment samples from Tomini Bay, Sulawesi were used for this study as a component of sediment. The samples were carried out by using a gravity corer at water depth range between 600 and 1400 m. This study was a part of mapping activity on marine geology and geophysics during the first cruise of R/V Geomarin III in 2010. The purpose of this study was to examine the subsurface geology related to the potency of energy and mineral resources. Top core sediment samples were washed through 0.063mm opening sieve and then dried in an oven. About maximum 300 foraminiferal specimens were picked from every dried washed residue sample to separate them from other particles under a binocular microscope with brush and water. The result showed that most samples were dominated by planktonic foraminifera (>90%), such as Globorotalia menardii, Orbulina universa, Globigerinoides ruber and others as typical of deep sea sediments. On the other hand, benthic foraminifera was found less than 10% that was represented by Cibicidoides wuellerstorfi, Ceratobulimina pacifica, Pyrgo sp., Bolivinita quadralatera, Uvigerina peregrina, etc. The characteristic of deep sea foraminiferal community of this area may be used for interpreting environmental deposition in the adjacent areas that is useful for petroleum exploration. Keywords: foraminifera, deep sea, Tomini Bay, Sulawesi.

BENTHIC FORAMINIFERA AS BIOINDICATOR OF CORAL REEF ENVIRONMENTAL CONDITION BASED ON FORAM Index IN NATUNA ISLANDS, PROVINCE OF RIAU ISLANDS Kinanti Gitaputri; Hikmat Kasmara; Tatang S. Erawan; Suhartati M.
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Foraminifera is one of single-celled protozoa, living in the water environment especially marine waters. This organism can be used as bioindicator of environmental conditions of coral reefs through a simple index called FORAM Index. The purpose of this research are to obtain FORAM Index values, to know any species of benthic foraminifera bioindicator of coral reefs environmental conditions that have been found and to find out whether there is a relationship between FORAM Index to the condition of coral reefs based on coral coverage percentage. The research used survey method on sediment sampling and measurement of environment parameters by P20 LIPI team in April 2011. Several important steps in this research such as sediment samples preparation, sample observation, and sample identification. The results showed that there were 80 species and 31 genera benthic foraminifera bioindicator of coral reefs environmental conditions were found in the Natuna Islands. The condition of coral reefs in the Natuna Islands based on FORAM Index (FI) values ranged from 2.6 to 5.94, and overall there was a positive relationship between FORAM Index and the condition of coral reefs based on coral coverage percentage i.e., the increase of FI was followed by the increase of coral coverage percentage. However, in the terms of correlation there were several different results, there was a strong correlation and a weak correlation. Keywords: foraminifera, FORAM index, coral reef.

SEAGRESS COVERAGE AND ECOSYSTEM CONDITION AT THE COASTAL AREA OF MADASANGER, JELENGA AND MALUK, WEST SUMBAWA Erny Poedjirahajoe; Ni Putu Diana Mahayani; Boy Rahardjo Sidharta; Muhamad Salamuddin
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The increase of temperature might affect the distribution and reproduction of seagrass. This research aims to determine the seagrass bed coverage and the ecosystem condition. Three line transects were established perpendicular to the coastal line with the distance of 50-100 m, or up to the border of the intertidal area. In each transect, sampling points were determined with a distance of 10-20 m. At the sampling points, a plot of 50 cm x 50 cm was established to measure the coverage percentage of seagrass vegetation. The seagrass species were also observed and recorded along the line transects. The percentage of seagrass coverage was measured using a method from Saito and Atobe (1994). The results showed that the coastal area of Jelenga has the highest percentage of seagrass coverage (>60%, healthy) among other coastal areas. This may be caused by the characteristic of Jelenga coast which was relatively calm, few visitors, low water turbidity, and high light penetration. While, other transects have percentage coverage of less than 60% (less healthy). There was one transect on Maluk coast which has coverage percentage of less than 29% (lack of seagrass species). The small coverage percentage on Maluk coast can be caused by the high number of visitors and high activity of fishing boats around the coast which results in high turbidity. Keywords: coverage, ecosystem condition, seagrass bed, west Sumbawa.

LIFE-FEED ENRICHMENT FOR LARVAL REARING OF YELLOWBAND CLOWNFISH (Premnas biaculeatus) Ketut Maha Setiawati; Gunawan Gunawan
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The seeds of yellowband clownfish from hatchery has a pale skin colour and a yellow stripe became white colour. The purposes of this research were to know the effects of life-feed enrichment on the growth of larva and the appearance of colors yellowband clownfish. The treatments were the enrichment of rotifers and Artemia with commercial enrichment + Nannochloropsis (A), and without commercial enrichment as control, only Nannochloropsis (B). This research conducted for 15 days rearing. Larva rearings of yellowband clownfish fish with treatment A were resulted the total length at the end experiment was 7.72 ± 0.63 mm, dan survival rate 52.6 ± 19.1 %. The total length at treatment B was 7. 61 ± 0.43 mm and survival rate 47.7 ± 24.2%. Different enrichment of life-feed was not significant different effect for total length, survival rate and colour of seeds Keywords: life-feed, enrichment, growth, survival rate, colour, yellowband clownfish.

DURATION TIME AND EGGS DENSITY TO IMPROVE CLOSED TRANSPORTATION TECHNOLOGY ON EGGS GROUPER Suko Ismi
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The grouper hatchery technology has been successfully developed and grouper seed can be produced massively and sustainly. Egg is one of key successes in the hatchery processes. Eggs taken from hatchery egg producer were often far away from a final hatchery location. This study tried to find out the effectiveness of eggs transportation duration and densities for eggs’ hatchability of tiger grouper (Epinephelus fuscoguttatus). The first treatment: eggs at a density of 400 000 eggs/8 l sea water, transported with different duration time i.e., 6, 12, 18, and 24 hours. The second treatment: transportation eggs with duration 24-hour at different density i.e., 100,000; 200,000;300,00; and 400,000 eggs/8 l sea waters. Eggs were packaged in a plastic bag with 8 liters of water media, the plastic size 100 cm x 55 cm, ratio water with oxygen was 1: 3, the plastic bag inserted to sterofoam with size 75 cm x 40 cm x 30 cm, to reduce the temperature in sterofoam was added ice the size of 500 grams , wrapped in newspaper, styrofoam covered by selotipe. The results showed that eggs with transportation time of 6 and 12 hours were better and significantly different (P <0.05) than transportation time of 18 and 24 hours. Furthermore, density of 100,000 and 200,000 eggs/8 l sea waters were better and significantly different (P <0.05) than that density of 300,000 and 400,000 eggs/8 l sea waters. Keywords: hatchery, eggs grouper, transportation.

SETTLEMENT ABILITY OF PEARL OYSTER (Pinctada maxima) LARVAE AT DIFFERENT POSITIONS AND DEPTHS COLLECTORS Mat Sardi Hamzah
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

One of the success factor in the cultivation of pearl oysters (Pinctada maxima) within laboratory scale of is the ability of the larvae to settle on the collector. Stocking collectors which are not on time with an irregular position could cause a decline in seed production. The research was conducted from 25 July to 27August 2011 at Laboratory of Marine Bio-industry Technical Implementatation Unit, Research Centre for Oceanography, Indonesian Institute of Sciences, Lombok, West Nusa Tenggara (NTB). The aim of the study was to observe the attachment of larvae at different position and depth. Analysis of variance showed that larvae settlement was influenced by depth instead of position and the interaction between them. Real Honest Different Test showed that in the 20 cm depth was significantly different from 60 cm and 100 cm in number of larvae attached on the collector. The highest survival rate was in 20 cm depth with 68,98% (516 larvae) while in 60 cm was 17,11% (128 larvae) and 100 cm (9,22% (69 larvae), and the others were attached on the wall of the tank 4,68% (35 larvae). Keywords: settlement ability of pearl oyster’s larvae (Pinctada maxima), collector, depth

SPECTRAL OF REMOTE SENSING REFLECTANCE OF SURFACE WATERS Bisman Nababan; Anak A.G. Wirapramana; Risti E. Arhatin
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Spectral measurements of remote sensing reflectance (Rrs) of surface waters in the northeastern Gulf of Mexico were conducted in various seasons in 1999-2000 using Fieldspec Analytical Spectral Devices (ASD) Spectroradiometer. Filtering process was performed on the data to eliminate invalid data. In general, in coastal waters particularly near rivers mouth (water type-2) the Rrs spectrals were relatively low at blue, maximum at green, and decreased to a minimum value at the red wavelength. In offshore waters (type-1), the general pattern of Rrs spectrals were maximum at the blue wavelength and then continued to decline at the green wavelength until the minimum value at the red wavelength except during summer where Rrs spectrals in most offshore area having the maximum value at the green wavelength due to the phytoplankton bloom as a result of freshwater intrusion from the Mississippi river. In general, the patterns and values of Rrs were significantly different among seasons and locations. Results showed that Rrs values at the blue wavelength (λ=400 nm) were generally higher in the spring than in other seasons ranging of 0.007-0.018 sr-1 in offshore waters and 0.004-0.015 sr-1 in coastal waters. During spring, Rrs values at the green wavelength (λ=500 nm) were also higher than in other seasons ranging of 0.005-0.013 sr-1 found in coastal waters. However, during summer in coastal waters, the maximum values of Rrs spectrals were found in different green wavelength on different locations showed the differences in the type and composition of phytoplankton, organic materials, and suspension matters at those locations. Keywords: remote sensing reflectance, phytoplankton, offshore, coastal, Gulf of Mexico

THE EFFECTS OF DIFFERENT IMMERSION METHOD AND TIME ON THE PHYSICO-CHEMICAL CHARACTERISTICS OF SKIPJACK TUNA (Katsuwonus pelamis) FISH MEAL Christina Litaay; Joko Santoso
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

High fat content in a dark fleshed fish can affect on nutritional value because it can lead to odors in fish meal products. Effort Immersion (deffating) is one way to reduce fat content in fish meal products in order to reduce the products from odor. Research on methods and durations of immersion effects were conducted from October to November 2011. This study aimed to determine the best method to get quality materials skipjact tuna fish meal based on methods and durations of immersion. Fish sampling were taken from the village of Latuhalat, Ambon-Maluku waters. Deffating process used water, 3% acetic acid, and 0.8% sodium bicarbonate. Immersion durations were 2, 4, and 6 hours. Deffating method using 0.8% sodium bicarbonate with 6 hours immersion time exhibited the best quality fish meal with protein content of 82.86% and 1.10% fat content. Keywords: deffating, fish meal, skipjact tuna.

DIMENSION OF SEAMOUNT USING MULTIBEAM ECHOSOUNDER IN BENGKULU WATERS Fahrulian Fahrulian; Henry Manik; Djoko Hartoyo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The purpose of this research was to determine the dimensions of seamount using echosuonder in Bengkulu waters. The survey was conducted by BPPT, LIPI, the Ministry of Energy and Mineral Resources, CGGVeritas, and the Institut de Physique du Globe (IPG) Paris in the southwest of the Sumatera island on 18-19 December 2010. Two acoustic instruments were used i.e., ELAC Seabeam 1050D with a frequency of 50 kHz and Simrad EM 12D with a frequency of 12 kHz. Data acquisition was obtained by using the hydrostar software in Baruna Jaya 3 and 4 research vessels. CARIS HIPS and SIPS6.1 softwares were used toprocess the data of bathymetry. Amplitude and backscatter data were obtained by data processing on the MBSystem. Data visualization in 3-D was performed using the Fladermaus 6.2 software (personal license of Djoko Hartoyo). Seamount form was assumed as a cone with an elliptical base to calculate the dimensions. The result showed an under water seamount of 320 Km from the southwest of Bengkulu city at -4°22’9.16’’latitude and 99°25’01.47’’ longitude. The seamount height was ± 3,968 meters and had two peak separated at ± 3,050 meters. Seamount peaks located at ± 1.270 meters below sea level. The major axis was ± 50,240 meters and the minor axis in this seamount was ± 5,644 meters Keywords: seamount dimension, bathymetry, backscattering, Bengkulu Waters

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Contact Name Dietriech G. Bengen

Contact Email dieter@indo.net.id

Phone +62251-8627323

Journal Mail Official 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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Contact Name
Dietriech G. Bengen

Contact Email
dieter@indo.net.id

Phone
+62251-8627323

Journal Mail Official
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

Location
Kota bogor,

Jawa barat

INDONESIA