Pelabuhan Ratu Research Articles

Hubungan Kumpulan Mineral Berat pada Sedimen Pantai dan Lepas Pantai dengan Batuan Asal Darat di Perairan Teluk Pelabuhan Ratu, Jawa Barat

DOI: 10.17014/ijog.v5i1.93 Based on the depth contour, the sea bottom morphology in southern part of the researched area is very steep, while in the northern area it is sloped slightly. It shows that sedimentation process is from south to the north and continues to the west. It is supported by the current process in studied area. Rock slope stability of hilly morphology in the Cimandiri River area is related to weathering, erosion, and transportation process in coastal and nearshore areas. The presence of mineral in the studied area caused by those processes, was accumulated in the mouth of Cimandiri River, coastal, and nearshore areas. Those minerals were deposited in Cibelendung to Karangbeureum nearshore area by the longshore current. Magnetite and pyroxene minerals are dominant along the coastal and offshore areas of Pelabuhan Ratu Bay. The presence of augite and diopside shows that the source rock is basic igneous rocks (basalt), while the presence of hornblende and biotite minerals tend to indicate that the source rock is intermediate igneous rocks (andesite).

Genetic Divergence and Evolutionary Relationship inFejervarya cancrivorafrom Indonesia and Other Asian Countries Inferred from Allozyme and MtDNA Sequence Analyses

To elucidate genetic divergence and evolutionary relationship in Fejervarya cancrivora from Indonesia and other Asian countries, allozyme and molecular analyses were carried out using 131 frogs collected from 24 populations in Indonesia, Thailand, Bangladesh, Malaysia, and the Philippines. In the allozymic survey, seventeen enzymatic loci were examined for 92 frogs from eight representative localities. The results showed that F. cancrivora is subdivided into two main groups, the mangrove type and the large- plus Pelabuhan ratu types. The average Nel's genetic distance between the two groups was 0.535. Molecular phylogenetic trees based on nucleotide sequences of the 16S rRNA and Cyt b genes and constructed with the ML, MP, NJ, and BI methods also showed that the individuals of F. cancrivora analyzed comprised two clades, the mangrove type and the large plus Pelabuhan ratu / Sulawesi types, the latter further split into two subclades, the large type and the Pelabuhan ratu / Sulawesi type. The geographical distribution of individuals of the three F. cancrivora types was examined. Ten Individuals from Bangladesh, Thailand, and the Philippines represented the mangrove type; 34 Individuals from Malaysia and Indonesia represented the large type; and 11 individuals from Indonesia represented the Pelabuhan ratu / Sulawesi type. Average sequence divergences among the three types were 5.78-10.22% for the 16S and 12.88-16.38% for Cyt b. Our results suggest that each of the three types can be regarded as a distinct species.

Molecular genotyping of Anisakis Dujardin, 1845 (Nematoda: Ascaridoidea: Anisakidae) larvae from marine fish of Balinese and Javanese waters, Indonesia

Abstract The genetic identification and distribution of Anisakis larvae in Indonesia is described. 110 Auxis rochei rochei and 45 Decapterus russellii were sampled from fish markets in North (Anturan) and South (Kedonganan) Bali. Nematode larvae from A. rochei rochei, Caesio cuning and Epinephelus areolatus from Kedonganan and from Coryphaena hippurus from Pelabuhan Ratu, South Java, were identified using sequence analysis of the internal transcribed spacers (ITS-1, ITS-2) and 5.8S region of rDNA. The larvae belonged to Anisakis typica with an identical sequence to this species from the spinner dolphin (Stenella longirostris) from Brazil, and to 2 further genotypes that differed from that sequence by 0.24–0.47 %. A. typica occurred in the migratory A. rochei rochei and C. hippurus, while Anisakis sp. 1 and 2 were isolated from the same fish species and the non-migratory C. cuning and E. areolatus. The latter genotype is distinguishable by 4 positions in the ITS-1 region (1.1 %), a genetic distance that indicates the presence of an Indonesian A. typica sibling species. The musculature infection in A. rochei rochei was low (2.5 %), indicating no major risk for the fish consumers. The much higher A. typica infection of fish intermediate hosts in the northern Bali coast is suggested to be dependent on the large dolphin population (nematode final hosts) in the waters off Lovina Beach (North Bali).

PEMANFAATAN LAMPU LISTRIK UNTUK PENINGKATAN HASIL TANGKAPAN PADA BAGAN APUNG TRADISIONAL DI PELABUHAN RATU

The objectives of this research were to know the effect of different light sources on the total catch, species composition and size of fish captured by traditional lift net. This research was conducted at the Pelabuhan Ratu Waters,West Java.Fishing experiment was conducted for 12 hours each night, for 5 night. Fishing operation was conducted alternately for two hours using kerosene lamp and electric lamp.The light illumination, temperature, salinity and water current were measured after setting the gear, while the catch data were measured after hauling. The maximum light penetration of kerosene lamp was able to reach 9 m depth (at the center of lift net), 8 m (at the middle of lift net) and 6 m (at the corner of lift net). In addition, by using kerosene and electric lamps, the light penetration was able reach 11 m (at center and midlle of lift net) and 12 m (at the corner of lift net).The total catch of lift net using kerosene lamp was 85.12 kg (9,086 fishes) comprise of 12 spesies with sizes 5.3 – 42.7 cm, while the total catch using combination of kerosene and electric lamps was 148.67 kg (12,685 fishes) comprise of 18 spesies with sizes 5.95 – 52.78 cm.The results showed, that the combination of kerosene and electric lamps was able to increase the total catch.

Efektivitas Penambahan Vitamin a Dan Zat Besi Pada Garam Yodium Terhadap Status Gizi Dan Konsentrasi Belajar Anak Sekolah Dasar

THE EFFECT OF VITAMIN A AND IRON ADDED INTO IODIZED SALT ON NUTRITION STATUS AND LEARNING CONCENTRATION OF ELEMENTARY SCHOOL CHILDREN. Background: It was assumed that in some areas of Indonesia previously recognized as area of endemic goitre, thenutrition problem in that area became more complex due to crisis of economy. Probably some people in that area not only suffering from 100 but also vitamin A and iron deficiency. In this condition intervention of multinutrient is more reasonable than of single nutrient in improving nutrition status. Objectives: The aim of this study was to investigate the effect of vitamin A and iron added into iodized salt on iodine status and learning concentration of elementary school children in moderate endemic goiter area. Methods: The study design was field trial. Study sites covered two subdistricts, namely Nagak subdistrict and Pelabuhan ratu subdistrict of Sukabumi District, West Java. A total of 221 boys and girls students in the fourth, fifth and sixth grades with positive goitre at grade I, by palpation were randomly assigned into four groups. Each group received different treatment. Group I received iodized salt (43 ppm of Iodine) + 180 ppm of vitamin A (A formula), group II received iodized salt (52 ppm) + 1500 ppm of iron (8 formula), group III received iodized salt only (37 ppm) (C formula) and group IV received iodized salt only (20 ppm). Data evaluation was collected 18 week after intervention. Results: The result of study revealed that proportion of goitre measured by palpation decreased in all groups, group I (14%), group II (7%), group III (21%) as well as group IV (19%). The increment of serum tetraiodotirosine (thyroxine) hormone (T4) of group II (5.02 ug/dl) and group I (4.60 ug/dl) were significantly higher than that of group Ill (2.04 ug/dl) or group IV (2.91 ug/dl). There were no significant differences in the increment of serum triiodotirosine hormone (T3) among group. The haemoglobin level of group II increased (0.36 g/dl), while group I and group IV were slightly decreased. The proportion of student suffering from anemia in group I decreased (25%), while in the other groups increased (4.3% to 9.8%). Conclusions: The increment of T4 was not followed by improvement of learning concentration measured by using 'Weschler Intelligence Scale for Children method. Keywords: 100 (Iodine deficiency disorder), nutrition status; iodine status; learning concentration; endemic goitre area; palpation; tetraiodotirosine (thyroxine); triiodotirosine; Weschler Intelligence Scale for Children.

Evaluation of photo voltaic generating system performance for fishing light application

SUMMARY: Authors tested the performances of the photo voltaic generating system of independent source with solar and storage batteries for the purpose of application for fishing activities. Converting efficiency was −0.0024t + 0.2231 (t is average temperature), and battery coefficient, which means efficiency of battery, was 0.378. Simulation for installment on bamboo-platform liftnet (Bagan) in Pelabuhan Ratu, Indonesia, shows good results (i.e. power generated by this system is expected to be 0.263 MJ/m2 per day, 48% greater than under the solar radiation conditions in Japan). Required area for the system installment is 18.2 m2 for 10 h lighting of 0.5 kW fishing light. It is possible to install the system on standard Bagans.

From normal to oblique subduction: Tectonic relationships between Java and Sumatra

The convergent motion of the Indian-Australian and the Eurasian Plates results in subduction at the Sunda Arc. Obliquity of subduction beneath Sumatra induces large strike-slip faults in Sumatra and its margin, whereas the subduction is almost perpendicular to the trench southwest of Java. The nature of the transition between these two subduction regimes is of major interest. New data collected with the Indonesian R.V. Baruna Jaya III, show that the Cimandiri Fault Zone of west Java continues out to sea. Sinistral activity seen on land, can be the conjugate of dextral strike-slip faulting along a NW-SE prolongation of the Sumatra strike-slip fault in the forearc domain. A structural transition is occurring south of the Pelabuhan Ratu Gulf and may therefore correspond to a change in the subduction regime. To the west, oblique subduction induces partitioning of the motion into convergent motion and northwestward strike-slip motion. To the east, opposite Java, subduction is normal and typical forearc basin develops. In the transition area, the curvature of the margin induces a northwestward increase of the obliquity of subduction and consequently of the lateral component of the partitioned motion. North-westward, displacement of the forearc domain results in internal extensional deformation and ablation of accreted sediments south of the Sunda Strait, explaining the concave shape of the deformation front.